1321 lines
45 KiB
Rust
1321 lines
45 KiB
Rust
use crate::parser::{parse_from_bytes, Error, Event, ParsedSectionHeader, Parser};
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use crate::values::{normalize_bytes, normalize_vec};
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use std::collections::{HashMap, VecDeque};
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use std::{borrow::Borrow, convert::TryFrom};
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use std::{borrow::Cow, fmt::Display};
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#[derive(PartialEq, Eq, Hash, Copy, Clone, PartialOrd, Ord, Debug)]
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pub enum GitConfigError<'a> {
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/// The requested section does not exist.
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SectionDoesNotExist(&'a str),
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/// The requested subsection does not exist.
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SubSectionDoesNotExist(Option<&'a str>),
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/// The key does not exist in the requested section.
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KeyDoesNotExist(&'a str),
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FailedConversion,
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}
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impl Display for GitConfigError<'_> {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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match self {
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// Todo, try parse as utf8 first for better looking errors
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Self::SectionDoesNotExist(s) => write!(f, "Section '{}' does not exist.", s),
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Self::SubSectionDoesNotExist(s) => match s {
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Some(s) => write!(f, "Subsection '{}' does not exist.", s),
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None => write!(f, "Top level section does not exist."),
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},
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Self::KeyDoesNotExist(k) => write!(f, "Name '{}' does not exist.", k),
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Self::FailedConversion => write!(f, "Failed to convert to specified type."),
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}
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}
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}
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impl std::error::Error for GitConfigError<'_> {}
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/// The section ID is a monotonically increasing ID used to refer to sections.
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/// This value does not imply any ordering between sections, as new sections
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/// with higher section IDs may be in between lower ID sections.
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///
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/// We need to use a section id because `git-config` permits sections with
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/// identical names. As a result, we can't simply use the section name as a key
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/// in a map.
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///
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/// This id guaranteed to be unique, but not guaranteed to be compact. In other
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/// words, it's possible that a section may have an ID of 3 but the next section
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/// has an ID of 5.
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#[derive(PartialEq, Eq, Hash, Copy, Clone, PartialOrd, Ord, Debug)]
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struct SectionId(usize);
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#[derive(PartialEq, Eq, Clone, Debug)]
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enum LookupTreeNode<'a> {
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Terminal(Vec<SectionId>),
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NonTerminal(HashMap<Cow<'a, str>, Vec<SectionId>>),
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}
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pub struct MutableValue<'borrow, 'lookup, 'event> {
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section: &'borrow mut Vec<Event<'event>>,
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key: &'lookup str,
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index: usize,
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size: usize,
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}
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impl MutableValue<'_, '_, '_> {
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/// Returns the actual value. This is computed each time this is called, so
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/// it's best to reuse this value or own it if an allocation is acceptable.
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pub fn value(&self) -> Result<Cow<'_, [u8]>, GitConfigError> {
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let mut found_key = false;
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let mut latest_value = None;
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let mut partial_value = None;
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// section_id is guaranteed to exist in self.sections, else we have a
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// violated invariant.
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for event in &self.section[self.index..self.size] {
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match event {
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Event::Key(event_key) if *event_key == self.key => found_key = true,
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Event::Value(v) if found_key => {
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found_key = false;
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latest_value = Some(Cow::Borrowed(v.borrow()));
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}
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Event::ValueNotDone(v) if found_key => {
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latest_value = None;
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partial_value = Some((*v).to_vec());
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}
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Event::ValueDone(v) if found_key => {
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found_key = false;
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partial_value.as_mut().unwrap().extend(&**v);
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}
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_ => (),
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}
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}
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latest_value
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.or_else(|| partial_value.map(normalize_vec))
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.ok_or(GitConfigError::KeyDoesNotExist(self.key))
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}
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/// Update the value to the provided one. This modifies the value such that
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/// the Value event(s) are replaced with a single new event containing the
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/// new value.
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pub fn set_bytes(&mut self, input: Vec<u8>) {
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self.section.drain(self.index..self.index + self.size);
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self.size = 1;
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self.section
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.insert(self.index, Event::Value(Cow::Owned(input)));
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}
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/// Update the value to the provided one. This modifies the value such that
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/// the Value event(s) are replaced with a single new event containing the
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/// new value.
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pub fn set_string(&mut self, input: String) {
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self.set_bytes(input.into_bytes());
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}
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}
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// pub struct MutableMultiValue<'borrow, 'lookup, 'event> {
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// section: &'borrow mut Vec<Event<'event>>,
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// key: &'lookup str,
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// indices_and_sizes: Vec<(usize, usize)>,
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// }
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/// High level `git-config` reader and writer.
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///
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/// Internally, this uses various acceleration data structures to improve
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/// performance.
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///
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/// # Multivar behavior
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///
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/// `git` is flexible enough to allow users to set a key multiple times in
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/// any number of identically named sections. When this is the case, the key
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/// is known as a "multivar". In this case, `get_raw_value` follows the
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/// "last one wins" approach that `git-config` internally uses for multivar
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/// resolution.
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///
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/// Concretely, the following config has a multivar, `a`, with the values
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/// of `b`, `c`, and `d`, while `e` is a single variable with the value
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/// `f g h`.
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///
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/// ```text
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/// [core]
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/// a = b
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/// a = c
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/// [core]
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/// a = d
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/// e = f g h
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/// ```
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///
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/// Calling methods that fetch or set only one value (such as [`get_raw_value`])
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/// key `a` with the above config will fetch `d` or replace `d`, since the last
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/// valid config key/value pair is `a = d`:
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///
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/// ```
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/// # use git_config::file::GitConfig;
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/// # use std::borrow::Cow;
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/// # use std::convert::TryFrom;
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/// # let git_config = GitConfig::try_from("[core]a=b\n[core]\na=c\na=d").unwrap();
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/// assert_eq!(git_config.get_raw_value("core", None, "a"), Ok(Cow::Borrowed("d".as_bytes())));
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/// ```
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///
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/// Consider the `multi` variants of the methods instead, if you want to work
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/// with all values instead.
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///
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/// [`get_raw_value`]: Self::get_raw_value
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#[derive(PartialEq, Eq, Clone, Debug)]
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pub struct GitConfig<'a> {
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/// The list of events that occur before an actual section. Since a
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/// `git-config` file prohibits global values, this vec is limited to only
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/// comment, newline, and whitespace events.
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front_matter_events: Vec<Event<'a>>,
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section_lookup_tree: HashMap<Cow<'a, str>, Vec<LookupTreeNode<'a>>>,
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/// SectionId to section mapping. The value of this HashMap contains actual
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/// events.
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///
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/// This indirection with the SectionId as the key is critical to flexibly
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/// supporting `git-config` sections, as duplicated keys are permitted.
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sections: HashMap<SectionId, Vec<Event<'a>>>,
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section_headers: HashMap<SectionId, ParsedSectionHeader<'a>>,
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section_id_counter: usize,
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section_order: VecDeque<SectionId>,
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}
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impl<'event> GitConfig<'event> {
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/// Returns an interpreted value given a section, an optional subsection and
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/// key.
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///
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/// It's recommended to use one of the values in the [`values`] module as
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/// the conversion is already implemented, but this function is flexible and
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/// will accept any type that implements [`TryFrom<&[u8]>`][`TryFrom`].
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///
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/// Consider [`Self::get_multi_value`] if you want to get all values of a
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/// multivar instead.
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///
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/// # Examples
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///
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/// ```
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/// # use git_config::file::{GitConfig, GitConfigError};
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/// # use git_config::values::{Integer, Value, Boolean};
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/// # use std::borrow::Cow;
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/// # use std::convert::TryFrom;
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/// let config = r#"
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/// [core]
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/// a = 10k
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/// c
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/// "#;
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/// let git_config = GitConfig::try_from(config).unwrap();
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/// // You can either use the turbofish to determine the type...
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/// let a_value = git_config.get_value::<Integer>("core", None, "a")?;
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/// // ... or explicitly declare the type to avoid the turbofish
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/// let c_value: Boolean = git_config.get_value("core", None, "c")?;
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/// # Ok::<(), GitConfigError>(())
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/// ```
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///
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/// # Errors
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///
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/// This function will return an error if the key is not in the requested
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/// section and subsection, if the section and subsection do not exist, or
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/// if there was an issue converting the type into the requested variant.
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///
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/// [`values`]: crate::values
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/// [`TryFrom`]: std::convert::TryFrom
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pub fn get_value<'b, T: TryFrom<Cow<'event, [u8]>>>(
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&'event self,
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section_name: &'b str,
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subsection_name: Option<&'b str>,
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key: &'b str,
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) -> Result<T, GitConfigError<'b>> {
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T::try_from(self.get_raw_value(section_name, subsection_name, key)?)
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.map_err(|_| GitConfigError::FailedConversion)
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}
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/// Returns an uninterpreted value given a section, an optional subsection
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/// and key.
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///
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/// Consider [`Self::get_raw_multi_value`] if you want to get all values of
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/// a multivar instead.
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///
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/// # Errors
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///
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/// This function will return an error if the key is not in the requested
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/// section and subsection, or if the section and subsection do not exist.
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pub fn get_raw_value<'lookup>(
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&'event self,
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section_name: &'lookup str,
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subsection_name: Option<&'lookup str>,
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key: &'lookup str,
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) -> Result<Cow<'event, [u8]>, GitConfigError<'lookup>> {
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// Note: cannot wrap around the raw_multi_value method because we need
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// to guarantee that the highest section id is used (so that we follow
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// the "last one wins" resolution strategy by `git-config`).
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let section_id = self.get_section_id_by_name_and_subname(section_name, subsection_name)?;
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let mut found_key = false;
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let mut latest_value = None;
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let mut partial_value = None;
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// section_id is guaranteed to exist in self.sections, else we have a
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// violated invariant.
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for event in self.sections.get(§ion_id).unwrap() {
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match event {
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Event::Key(event_key) if *event_key == key => found_key = true,
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Event::Value(v) if found_key => {
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found_key = false;
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latest_value = Some(Cow::Borrowed(v.borrow()));
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partial_value = None;
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}
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Event::ValueNotDone(v) if found_key => {
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latest_value = None;
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partial_value = Some((*v).to_vec());
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}
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Event::ValueDone(v) if found_key => {
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found_key = false;
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partial_value.as_mut().unwrap().extend(&**v);
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}
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_ => (),
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}
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}
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latest_value
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.or_else(|| partial_value.map(normalize_vec))
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.ok_or(GitConfigError::KeyDoesNotExist(key))
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}
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/// Returns a mutable reference to an uninterpreted value given a section,
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/// an optional subsection and key.
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///
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/// Consider [`Self::get_raw_multi_value_mut`] if you want to get mutable
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/// references to all values of a multivar instead.
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///
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/// # Errors
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///
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/// This function will return an error if the key is not in the requested
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/// section and subsection, or if the section and subsection do not exist.
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pub fn get_raw_value_mut<'lookup>(
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&mut self,
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section_name: &'lookup str,
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subsection_name: Option<&'lookup str>,
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key: &'lookup str,
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) -> Result<MutableValue<'_, 'lookup, 'event>, GitConfigError<'lookup>> {
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// Note: cannot wrap around the raw_multi_value method because we need
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// to guarantee that the highest section id is used (so that we follow
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// the "last one wins" resolution strategy by `git-config`).
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let section_id = self.get_section_id_by_name_and_subname(section_name, subsection_name)?;
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let mut size = 0;
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let mut index = 0;
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let mut found_key = false;
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for (i, event) in self.sections.get(§ion_id).unwrap().iter().enumerate() {
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match event {
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Event::Key(event_key) if *event_key == key => found_key = true,
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Event::Value(_) if found_key => {
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found_key = false;
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size = 1;
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index = i;
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}
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Event::ValueNotDone(_) if found_key => {
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size = 1;
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index = i;
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}
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Event::ValueDone(_) if found_key => {
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found_key = false;
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size += 1;
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}
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_ => (),
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}
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}
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if size == 0 {
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return Err(GitConfigError::KeyDoesNotExist(key));
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}
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Ok(MutableValue {
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section: self.sections.get_mut(§ion_id).unwrap(),
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key,
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size,
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index,
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})
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}
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/// Returns all uninterpreted values given a section, an optional subsection
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/// and key.
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///
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/// # Examples
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///
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/// If you have the following config:
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///
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/// ```text
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/// [core]
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/// a = b
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/// [core]
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/// a = c
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/// a = d
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/// ```
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///
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/// Attempting to get all values of `a` yields the following:
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///
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/// ```
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/// # use git_config::file::GitConfig;
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/// # use std::borrow::Cow;
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/// # use std::convert::TryFrom;
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/// # let git_config = GitConfig::try_from("[core]a=b\n[core]\na=c\na=d").unwrap();
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/// assert_eq!(
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/// git_config.get_raw_multi_value("core", None, "a"),
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/// Ok(vec![
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/// Cow::<[u8]>::Borrowed(b"b"),
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/// Cow::<[u8]>::Borrowed(b"c"),
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/// Cow::<[u8]>::Borrowed(b"d"),
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/// ]),
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/// );
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/// ```
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///
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/// Consider [`Self::get_raw_value`] if you want to get the resolved single
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/// value for a given key, if your key does not support multi-valued values.
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///
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/// # Errors
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///
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/// This function will return an error if the key is not in any requested
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/// section and subsection, or if no instance of the section and subsections
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/// exist.
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pub fn get_raw_multi_value<'lookup>(
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&self,
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section_name: &'lookup str,
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subsection_name: Option<&'lookup str>,
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key: &'lookup str,
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) -> Result<Vec<Cow<'_, [u8]>>, GitConfigError<'lookup>> {
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let key = key;
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let mut values = vec![];
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for section_id in self.get_section_ids_by_name_and_subname(section_name, subsection_name)? {
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let mut found_key = false;
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let mut partial_value = None;
|
|
// section_id is guaranteed to exist in self.sections, else we
|
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// have a violated invariant.
|
|
for event in self.sections.get(section_id).unwrap() {
|
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match event {
|
|
Event::Key(event_key) if *event_key == key => found_key = true,
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Event::Value(v) if found_key => {
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values.push(normalize_bytes(v));
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found_key = false;
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}
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Event::ValueNotDone(v) if found_key => {
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partial_value = Some((*v).to_vec());
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}
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|
Event::ValueDone(v) if found_key => {
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found_key = false;
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partial_value.as_mut().unwrap().extend(&**v);
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values.push(normalize_vec(partial_value.take().unwrap()));
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}
|
|
_ => (),
|
|
}
|
|
}
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|
}
|
|
|
|
if values.is_empty() {
|
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Err(GitConfigError::KeyDoesNotExist(key))
|
|
} else {
|
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Ok(values)
|
|
}
|
|
}
|
|
|
|
/// Returns mutable references to all uninterpreted values given a section,
|
|
/// an optional subsection and key.
|
|
///
|
|
/// # Examples
|
|
///
|
|
/// If you have the following config:
|
|
///
|
|
/// ```text
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|
/// [core]
|
|
/// a = b
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|
/// [core]
|
|
/// a = c
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|
/// a = d
|
|
/// ```
|
|
///
|
|
/// Attempting to get all values of `a` yields the following:
|
|
///
|
|
/// ```
|
|
/// # use git_config::file::{GitConfig, GitConfigError};
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|
/// # use std::borrow::Cow;
|
|
/// # use std::convert::TryFrom;
|
|
/// # let mut git_config = GitConfig::try_from("[core]a=b\n[core]\na=c\na=d").unwrap();
|
|
/// assert_eq!(
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|
/// git_config.get_raw_multi_value("core", None, "a")?,
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|
/// vec![
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|
/// Cow::Borrowed(b"b"),
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/// Cow::Borrowed(b"c"),
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/// Cow::Borrowed(b"d")
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|
/// ]
|
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/// );
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|
/// for value in git_config.get_raw_multi_value_mut("core", None, "a")? {
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/// *value = Cow::Borrowed(b"g");
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|
///}
|
|
/// assert_eq!(
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/// git_config.get_raw_multi_value("core", None, "a")?,
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/// vec![
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/// Cow::Borrowed(b"g"),
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/// Cow::Borrowed(b"g"),
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/// Cow::Borrowed(b"g")
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|
/// ],
|
|
/// );
|
|
/// # Ok::<(), GitConfigError>(())
|
|
/// ```
|
|
///
|
|
/// Consider [`Self::get_raw_value`] if you want to get the resolved single
|
|
/// value for a given key, if your key does not support multi-valued values.
|
|
///
|
|
/// Note that this operation is relatively expensive, requiring a full
|
|
/// traversal of the config.
|
|
///
|
|
/// # Errors
|
|
///
|
|
/// This function will return an error if the key is not in any requested
|
|
/// section and subsection, or if no instance of the section and subsections
|
|
/// exist.
|
|
pub fn get_raw_multi_value_mut<'lookup>(
|
|
&mut self,
|
|
section_name: &'lookup str,
|
|
subsection_name: Option<&'lookup str>,
|
|
key: &'lookup str,
|
|
) -> Result<Vec<&mut Cow<'event, [u8]>>, GitConfigError<'lookup>> {
|
|
let key = key;
|
|
let section_ids = self
|
|
.get_section_ids_by_name_and_subname(section_name, subsection_name)?
|
|
.to_vec();
|
|
let mut found_key = false;
|
|
let values: Vec<&mut Cow<'event, [u8]>> = self
|
|
.sections
|
|
.iter_mut()
|
|
.filter_map(|(k, v)| {
|
|
if section_ids.contains(k) {
|
|
let mut values = vec![];
|
|
for event in v {
|
|
match event {
|
|
Event::Key(event_key) if *event_key == key => found_key = true,
|
|
Event::Value(v) if found_key => {
|
|
values.push(v);
|
|
found_key = false;
|
|
}
|
|
_ => (),
|
|
}
|
|
}
|
|
Some(values)
|
|
} else {
|
|
None
|
|
}
|
|
})
|
|
.flatten()
|
|
.collect();
|
|
|
|
// TODO: return mutable entry instead
|
|
// TODO: support partial values
|
|
if values.is_empty() {
|
|
Err(GitConfigError::KeyDoesNotExist(key))
|
|
} else {
|
|
Ok(values)
|
|
}
|
|
}
|
|
|
|
/// Sets a value in a given section, optional subsection, and key value.
|
|
///
|
|
/// # Examples
|
|
///
|
|
/// Given the config,
|
|
///
|
|
/// ```text
|
|
/// [core]
|
|
/// a = b
|
|
/// [core]
|
|
/// a = c
|
|
/// a = d
|
|
/// ```
|
|
///
|
|
/// Setting a new value to the key `core.a` will yield the following:
|
|
///
|
|
/// ```
|
|
/// # use git_config::file::{GitConfig, GitConfigError};
|
|
/// # use std::borrow::Cow;
|
|
/// # use std::convert::TryFrom;
|
|
/// # let mut git_config = GitConfig::try_from("[core]a=b\n[core]\na=c\na=d").unwrap();
|
|
/// git_config.set_raw_value("core", None, "a", vec![b'e'])?;
|
|
/// assert_eq!(git_config.get_raw_value("core", None, "a")?, Cow::Borrowed(b"e"));
|
|
/// # Ok::<(), GitConfigError>(())
|
|
/// ```
|
|
///
|
|
/// # Errors
|
|
///
|
|
/// This errors if any lookup input (section, subsection, and key value) fails.
|
|
pub fn set_raw_value<'lookup>(
|
|
&mut self,
|
|
section_name: &'lookup str,
|
|
subsection_name: Option<&'lookup str>,
|
|
key: &'lookup str,
|
|
new_value: Vec<u8>,
|
|
) -> Result<(), GitConfigError<'lookup>> {
|
|
self.get_raw_value_mut(section_name, subsection_name, key)
|
|
.map(|mut entry| entry.set_bytes(new_value))
|
|
}
|
|
|
|
/// Sets a multivar in a given section, optional subsection, and key value.
|
|
///
|
|
/// This internally zips together the new values and the existing values.
|
|
/// As a result, if more new values are provided than the current amount of
|
|
/// multivars, then the latter values are not applied. If there are less
|
|
/// new values than old ones then the remaining old values are unmodified.
|
|
///
|
|
/// **Note**: Mutation order is _not_ guaranteed and is non-deterministic.
|
|
/// If you need finer control over which values of the multivar are set,
|
|
/// consider using [`get_raw_multi_value_mut`], which will let you iterate
|
|
/// and check over the values instead. This is best used as a convenience
|
|
/// function for setting multivars whose values should be treated as an
|
|
/// unordered set.
|
|
///
|
|
/// # Examples
|
|
///
|
|
/// Let us use the follow config for all examples:
|
|
///
|
|
/// ```text
|
|
/// [core]
|
|
/// a = b
|
|
/// [core]
|
|
/// a = c
|
|
/// a = d
|
|
/// ```
|
|
///
|
|
/// Setting an equal number of values:
|
|
///
|
|
/// ```
|
|
/// # use git_config::file::{GitConfig, GitConfigError};
|
|
/// # use std::borrow::Cow;
|
|
/// # use std::convert::TryFrom;
|
|
/// # let mut git_config = GitConfig::try_from("[core]a=b\n[core]\na=c\na=d").unwrap();
|
|
/// let new_values: Vec<Cow<'_, [u8]>> = vec![
|
|
/// Cow::Borrowed(b"x"),
|
|
/// Cow::Borrowed(b"y"),
|
|
/// Cow::Borrowed(b"z"),
|
|
/// ];
|
|
/// git_config.set_raw_multi_value("core", None, "a", new_values.into_iter())?;
|
|
/// let fetched_config = git_config.get_raw_multi_value("core", None, "a")?;
|
|
/// assert!(fetched_config.contains(&Cow::Borrowed(b"x")));
|
|
/// assert!(fetched_config.contains(&Cow::Borrowed(b"y")));
|
|
/// assert!(fetched_config.contains(&Cow::Borrowed(b"z")));
|
|
/// # Ok::<(), GitConfigError>(())
|
|
/// ```
|
|
///
|
|
/// Setting less than the number of present values sets the first ones found:
|
|
///
|
|
/// ```
|
|
/// # use git_config::file::{GitConfig, GitConfigError};
|
|
/// # use std::borrow::Cow;
|
|
/// # use std::convert::TryFrom;
|
|
/// # let mut git_config = GitConfig::try_from("[core]a=b\n[core]\na=c\na=d").unwrap();
|
|
/// let new_values: Vec<Cow<'_, [u8]>> = vec![
|
|
/// Cow::Borrowed(b"x"),
|
|
/// Cow::Borrowed(b"y"),
|
|
/// ];
|
|
/// git_config.set_raw_multi_value("core", None, "a", new_values.into_iter())?;
|
|
/// let fetched_config = git_config.get_raw_multi_value("core", None, "a")?;
|
|
/// assert!(fetched_config.contains(&Cow::Borrowed(b"x")));
|
|
/// assert!(fetched_config.contains(&Cow::Borrowed(b"y")));
|
|
/// # Ok::<(), GitConfigError>(())
|
|
/// ```
|
|
///
|
|
/// Setting more than the number of present values discards the rest:
|
|
///
|
|
/// ```
|
|
/// # use git_config::file::{GitConfig, GitConfigError};
|
|
/// # use std::borrow::Cow;
|
|
/// # use std::convert::TryFrom;
|
|
/// # let mut git_config = GitConfig::try_from("[core]a=b\n[core]\na=c\na=d").unwrap();
|
|
/// let new_values: Vec<Cow<'_, [u8]>> = vec![
|
|
/// Cow::Borrowed(b"x"),
|
|
/// Cow::Borrowed(b"y"),
|
|
/// Cow::Borrowed(b"z"),
|
|
/// Cow::Borrowed(b"discarded"),
|
|
/// ];
|
|
/// git_config.set_raw_multi_value("core", None, "a", new_values.into_iter())?;
|
|
/// assert!(!git_config.get_raw_multi_value("core", None, "a")?.contains(&Cow::Borrowed(b"discarded")));
|
|
/// # Ok::<(), GitConfigError>(())
|
|
/// ```
|
|
///
|
|
/// # Errors
|
|
///
|
|
/// This errors if any lookup input (section, subsection, and key value) fails.
|
|
///
|
|
/// [`get_raw_multi_value_mut`]: Self::get_raw_multi_value_mut
|
|
pub fn set_raw_multi_value<'lookup>(
|
|
&mut self,
|
|
section_name: &'lookup str,
|
|
subsection_name: Option<&'lookup str>,
|
|
key: &'lookup str,
|
|
new_values: impl Iterator<Item = Cow<'event, [u8]>>,
|
|
) -> Result<(), GitConfigError<'lookup>> {
|
|
let values = self.get_raw_multi_value_mut(section_name, subsection_name, key)?;
|
|
for (old, new) in values.into_iter().zip(new_values) {
|
|
*old = new;
|
|
}
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
// Private helper functions
|
|
impl<'event> GitConfig<'event> {
|
|
fn push_section(
|
|
&mut self,
|
|
current_section_name: Option<Cow<'event, str>>,
|
|
current_subsection_name: Option<Cow<'event, str>>,
|
|
maybe_section: &mut Option<Vec<Event<'event>>>,
|
|
) {
|
|
if let Some(section) = maybe_section.take() {
|
|
let new_section_id = SectionId(self.section_id_counter);
|
|
self.sections.insert(new_section_id, section);
|
|
let lookup = self
|
|
.section_lookup_tree
|
|
.entry(current_section_name.unwrap())
|
|
.or_default();
|
|
|
|
let mut found_node = false;
|
|
if let Some(subsection_name) = current_subsection_name {
|
|
for node in lookup.iter_mut() {
|
|
if let LookupTreeNode::NonTerminal(subsection) = node {
|
|
found_node = true;
|
|
subsection
|
|
// Despite the clone `push_section` is always called
|
|
// with a Cow::Borrowed, so this is effectively a
|
|
// copy.
|
|
.entry(subsection_name.clone())
|
|
.or_default()
|
|
.push(new_section_id);
|
|
break;
|
|
}
|
|
}
|
|
if !found_node {
|
|
let mut map = HashMap::new();
|
|
map.insert(subsection_name, vec![new_section_id]);
|
|
lookup.push(LookupTreeNode::NonTerminal(map));
|
|
}
|
|
} else {
|
|
for node in lookup.iter_mut() {
|
|
if let LookupTreeNode::Terminal(vec) = node {
|
|
found_node = true;
|
|
vec.push(new_section_id);
|
|
break;
|
|
}
|
|
}
|
|
if !found_node {
|
|
lookup.push(LookupTreeNode::Terminal(vec![new_section_id]))
|
|
}
|
|
}
|
|
self.section_order.push_back(new_section_id);
|
|
self.section_id_counter += 1;
|
|
}
|
|
}
|
|
|
|
fn get_section_id_by_name_and_subname<'lookup>(
|
|
&'event self,
|
|
section_name: &'lookup str,
|
|
subsection_name: Option<&'lookup str>,
|
|
) -> Result<SectionId, GitConfigError<'lookup>> {
|
|
self.get_section_ids_by_name_and_subname(section_name, subsection_name)
|
|
.map(|vec| {
|
|
// get_section_ids_by_name_and_subname is guaranteed to return
|
|
// a non-empty vec, so max can never return empty.
|
|
*vec.iter().max().unwrap()
|
|
})
|
|
}
|
|
|
|
fn get_section_ids_by_name_and_subname<'lookup>(
|
|
&self,
|
|
section_name: &'lookup str,
|
|
subsection_name: Option<&'lookup str>,
|
|
) -> Result<&[SectionId], GitConfigError<'lookup>> {
|
|
let section_ids = self
|
|
.section_lookup_tree
|
|
.get(section_name)
|
|
.ok_or(GitConfigError::SectionDoesNotExist(section_name))?;
|
|
let mut maybe_ids = None;
|
|
// Don't simplify if and matches here -- the for loop currently needs
|
|
// `n + 1` checks, while the if and matches will result in the for loop
|
|
// needing `2n` checks.
|
|
if let Some(subsect_name) = subsection_name {
|
|
for node in section_ids {
|
|
if let LookupTreeNode::NonTerminal(subsection_lookup) = node {
|
|
maybe_ids = subsection_lookup.get(subsect_name);
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
for node in section_ids {
|
|
if let LookupTreeNode::Terminal(subsection_lookup) = node {
|
|
maybe_ids = Some(subsection_lookup);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
maybe_ids
|
|
.map(Vec::as_slice)
|
|
.ok_or(GitConfigError::SubSectionDoesNotExist(subsection_name))
|
|
}
|
|
}
|
|
|
|
impl<'a> TryFrom<&'a str> for GitConfig<'a> {
|
|
type Error = Error<'a>;
|
|
|
|
/// Convenience constructor. Attempts to parse the provided string into a
|
|
/// [`GitConfig`]. See [`parse_from_str`] for more information.
|
|
///
|
|
/// [`parse_from_str`]: crate::parser::parse_from_str
|
|
fn try_from(s: &'a str) -> Result<Self, Self::Error> {
|
|
parse_from_bytes(s.as_bytes()).map(Self::from)
|
|
}
|
|
}
|
|
|
|
impl<'a> TryFrom<&'a [u8]> for GitConfig<'a> {
|
|
type Error = Error<'a>;
|
|
|
|
/// Convenience constructor. Attempts to parse the provided byte string into
|
|
//// a [`GitConfig`]. See [`parse_from_bytes`] for more information.
|
|
///
|
|
/// [`parse_from_bytes`]: crate::parser::parse_from_bytes
|
|
fn try_from(value: &'a [u8]) -> Result<Self, Self::Error> {
|
|
parse_from_bytes(value).map(Self::from)
|
|
}
|
|
}
|
|
|
|
impl<'a> From<Parser<'a>> for GitConfig<'a> {
|
|
fn from(parser: Parser<'a>) -> Self {
|
|
let mut new_self = Self {
|
|
front_matter_events: vec![],
|
|
sections: HashMap::new(),
|
|
section_lookup_tree: HashMap::new(),
|
|
section_headers: HashMap::new(),
|
|
section_id_counter: 0,
|
|
section_order: VecDeque::new(),
|
|
};
|
|
|
|
// Current section that we're building
|
|
let mut current_section_name: Option<Cow<'a, str>> = None;
|
|
let mut current_subsection_name: Option<Cow<'a, str>> = None;
|
|
let mut maybe_section: Option<Vec<Event<'a>>> = None;
|
|
|
|
for event in parser.into_iter() {
|
|
match event {
|
|
Event::SectionHeader(header) => {
|
|
new_self.push_section(
|
|
current_section_name,
|
|
current_subsection_name,
|
|
&mut maybe_section,
|
|
);
|
|
|
|
// Initialize new section
|
|
// We need to store the new, current id counter, so don't
|
|
// use new_section_id here and use the already incremented
|
|
// section id value.
|
|
new_self
|
|
.section_headers
|
|
.insert(SectionId(new_self.section_id_counter), header.clone());
|
|
let (name, subname) = (header.name, header.subsection_name);
|
|
maybe_section = Some(vec![]);
|
|
current_section_name = Some(name);
|
|
current_subsection_name = subname;
|
|
}
|
|
e @ Event::Key(_)
|
|
| e @ Event::Value(_)
|
|
| e @ Event::ValueNotDone(_)
|
|
| e @ Event::ValueDone(_)
|
|
| e @ Event::KeyValueSeparator => maybe_section
|
|
.as_mut()
|
|
.expect("Got a section-only event before a section")
|
|
.push(e),
|
|
e @ Event::Comment(_) | e @ Event::Newline(_) | e @ Event::Whitespace(_) => {
|
|
match maybe_section {
|
|
Some(ref mut section) => section.push(e),
|
|
None => new_self.front_matter_events.push(e),
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// The last section doesn't get pushed since we only push if there's a
|
|
// new section header, so we need to call push one more time.
|
|
new_self.push_section(
|
|
current_section_name,
|
|
current_subsection_name,
|
|
&mut maybe_section,
|
|
);
|
|
|
|
new_self
|
|
}
|
|
}
|
|
|
|
impl Display for GitConfig<'_> {
|
|
/// Note that this is a best-effort attempt at printing a `GitConfig`. If
|
|
/// there are non UTF-8 values in your config, this will _NOT_ render as
|
|
/// read.
|
|
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
|
|
for front_matter in &self.front_matter_events {
|
|
front_matter.fmt(f)?;
|
|
}
|
|
|
|
for section_id in &self.section_order {
|
|
self.section_headers.get(section_id).unwrap().fmt(f)?;
|
|
for event in self.sections.get(section_id).unwrap() {
|
|
event.fmt(f)?;
|
|
}
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
// todo impl serialize
|
|
|
|
#[cfg(test)]
|
|
mod from_parser {
|
|
use super::*;
|
|
use crate::test_util::*;
|
|
|
|
#[test]
|
|
fn parse_empty() {
|
|
let config = GitConfig::try_from("").unwrap();
|
|
assert!(config.section_headers.is_empty());
|
|
assert_eq!(config.section_id_counter, 0);
|
|
assert!(config.section_lookup_tree.is_empty());
|
|
assert!(config.sections.is_empty());
|
|
assert!(config.section_order.is_empty());
|
|
}
|
|
|
|
#[test]
|
|
fn parse_single_section() {
|
|
let mut config = GitConfig::try_from("[core]\na=b\nc=d").unwrap();
|
|
let expected_separators = {
|
|
let mut map = HashMap::new();
|
|
map.insert(SectionId(0), section_header("core", None));
|
|
map
|
|
};
|
|
assert_eq!(config.section_headers, expected_separators);
|
|
assert_eq!(config.section_id_counter, 1);
|
|
let expected_lookup_tree = {
|
|
let mut tree = HashMap::new();
|
|
tree.insert(
|
|
Cow::Borrowed("core"),
|
|
vec![LookupTreeNode::Terminal(vec![SectionId(0)])],
|
|
);
|
|
tree
|
|
};
|
|
assert_eq!(config.section_lookup_tree, expected_lookup_tree);
|
|
let expected_sections = {
|
|
let mut sections = HashMap::new();
|
|
sections.insert(
|
|
SectionId(0),
|
|
vec![
|
|
newline_event(),
|
|
name_event("a"),
|
|
Event::KeyValueSeparator,
|
|
value_event("b"),
|
|
newline_event(),
|
|
name_event("c"),
|
|
Event::KeyValueSeparator,
|
|
value_event("d"),
|
|
],
|
|
);
|
|
sections
|
|
};
|
|
assert_eq!(config.sections, expected_sections);
|
|
assert_eq!(config.section_order.make_contiguous(), &[SectionId(0)]);
|
|
}
|
|
|
|
#[test]
|
|
fn parse_single_subsection() {
|
|
let mut config = GitConfig::try_from("[core.subsec]\na=b\nc=d").unwrap();
|
|
let expected_separators = {
|
|
let mut map = HashMap::new();
|
|
map.insert(SectionId(0), section_header("core", (".", "subsec")));
|
|
map
|
|
};
|
|
assert_eq!(config.section_headers, expected_separators);
|
|
assert_eq!(config.section_id_counter, 1);
|
|
let expected_lookup_tree = {
|
|
let mut tree = HashMap::new();
|
|
let mut inner_tree = HashMap::new();
|
|
inner_tree.insert(Cow::Borrowed("subsec"), vec![SectionId(0)]);
|
|
tree.insert(
|
|
Cow::Borrowed("core"),
|
|
vec![LookupTreeNode::NonTerminal(inner_tree)],
|
|
);
|
|
tree
|
|
};
|
|
assert_eq!(config.section_lookup_tree, expected_lookup_tree);
|
|
let expected_sections = {
|
|
let mut sections = HashMap::new();
|
|
sections.insert(
|
|
SectionId(0),
|
|
vec![
|
|
newline_event(),
|
|
name_event("a"),
|
|
Event::KeyValueSeparator,
|
|
value_event("b"),
|
|
newline_event(),
|
|
name_event("c"),
|
|
Event::KeyValueSeparator,
|
|
value_event("d"),
|
|
],
|
|
);
|
|
sections
|
|
};
|
|
assert_eq!(config.sections, expected_sections);
|
|
assert_eq!(config.section_order.make_contiguous(), &[SectionId(0)]);
|
|
}
|
|
|
|
#[test]
|
|
fn parse_multiple_sections() {
|
|
let mut config = GitConfig::try_from("[core]\na=b\nc=d\n[other]e=f").unwrap();
|
|
let expected_separators = {
|
|
let mut map = HashMap::new();
|
|
map.insert(SectionId(0), section_header("core", None));
|
|
map.insert(SectionId(1), section_header("other", None));
|
|
map
|
|
};
|
|
assert_eq!(config.section_headers, expected_separators);
|
|
assert_eq!(config.section_id_counter, 2);
|
|
let expected_lookup_tree = {
|
|
let mut tree = HashMap::new();
|
|
tree.insert(
|
|
Cow::Borrowed("core"),
|
|
vec![LookupTreeNode::Terminal(vec![SectionId(0)])],
|
|
);
|
|
tree.insert(
|
|
Cow::Borrowed("other"),
|
|
vec![LookupTreeNode::Terminal(vec![SectionId(1)])],
|
|
);
|
|
tree
|
|
};
|
|
assert_eq!(config.section_lookup_tree, expected_lookup_tree);
|
|
let expected_sections = {
|
|
let mut sections = HashMap::new();
|
|
sections.insert(
|
|
SectionId(0),
|
|
vec![
|
|
newline_event(),
|
|
name_event("a"),
|
|
Event::KeyValueSeparator,
|
|
value_event("b"),
|
|
newline_event(),
|
|
name_event("c"),
|
|
Event::KeyValueSeparator,
|
|
value_event("d"),
|
|
newline_event(),
|
|
],
|
|
);
|
|
sections.insert(
|
|
SectionId(1),
|
|
vec![name_event("e"), Event::KeyValueSeparator, value_event("f")],
|
|
);
|
|
sections
|
|
};
|
|
assert_eq!(config.sections, expected_sections);
|
|
assert_eq!(
|
|
config.section_order.make_contiguous(),
|
|
&[SectionId(0), SectionId(1)]
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn parse_multiple_duplicate_sections() {
|
|
let mut config = GitConfig::try_from("[core]\na=b\nc=d\n[core]e=f").unwrap();
|
|
let expected_separators = {
|
|
let mut map = HashMap::new();
|
|
map.insert(SectionId(0), section_header("core", None));
|
|
map.insert(SectionId(1), section_header("core", None));
|
|
map
|
|
};
|
|
assert_eq!(config.section_headers, expected_separators);
|
|
assert_eq!(config.section_id_counter, 2);
|
|
let expected_lookup_tree = {
|
|
let mut tree = HashMap::new();
|
|
tree.insert(
|
|
Cow::Borrowed("core"),
|
|
vec![LookupTreeNode::Terminal(vec![SectionId(0), SectionId(1)])],
|
|
);
|
|
tree
|
|
};
|
|
assert_eq!(config.section_lookup_tree, expected_lookup_tree);
|
|
let expected_sections = {
|
|
let mut sections = HashMap::new();
|
|
sections.insert(
|
|
SectionId(0),
|
|
vec![
|
|
newline_event(),
|
|
name_event("a"),
|
|
Event::KeyValueSeparator,
|
|
value_event("b"),
|
|
newline_event(),
|
|
name_event("c"),
|
|
Event::KeyValueSeparator,
|
|
value_event("d"),
|
|
newline_event(),
|
|
],
|
|
);
|
|
sections.insert(
|
|
SectionId(1),
|
|
vec![name_event("e"), Event::KeyValueSeparator, value_event("f")],
|
|
);
|
|
sections
|
|
};
|
|
assert_eq!(config.sections, expected_sections);
|
|
assert_eq!(
|
|
config.section_order.make_contiguous(),
|
|
&[SectionId(0), SectionId(1)]
|
|
);
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod get_raw_value {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn single_section() {
|
|
let config = GitConfig::try_from("[core]\na=b\nc=d").unwrap();
|
|
assert_eq!(
|
|
config.get_raw_value("core", None, "a"),
|
|
Ok(Cow::<[u8]>::Borrowed(b"b"))
|
|
);
|
|
assert_eq!(
|
|
config.get_raw_value("core", None, "c"),
|
|
Ok(Cow::<[u8]>::Borrowed(b"d"))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn last_one_wins_respected_in_section() {
|
|
let config = GitConfig::try_from("[core]\na=b\na=d").unwrap();
|
|
assert_eq!(
|
|
config.get_raw_value("core", None, "a"),
|
|
Ok(Cow::<[u8]>::Borrowed(b"d"))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn last_one_wins_respected_across_section() {
|
|
let config = GitConfig::try_from("[core]\na=b\n[core]\na=d").unwrap();
|
|
assert_eq!(
|
|
config.get_raw_value("core", None, "a"),
|
|
Ok(Cow::<[u8]>::Borrowed(b"d"))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn section_not_found() {
|
|
let config = GitConfig::try_from("[core]\na=b\nc=d").unwrap();
|
|
assert_eq!(
|
|
config.get_raw_value("foo", None, "a"),
|
|
Err(GitConfigError::SectionDoesNotExist("foo"))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn subsection_not_found() {
|
|
let config = GitConfig::try_from("[core]\na=b\nc=d").unwrap();
|
|
assert_eq!(
|
|
config.get_raw_value("core", Some("a"), "a"),
|
|
Err(GitConfigError::SubSectionDoesNotExist(Some("a")))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn key_not_found() {
|
|
let config = GitConfig::try_from("[core]\na=b\nc=d").unwrap();
|
|
assert_eq!(
|
|
config.get_raw_value("core", None, "aaaaaa"),
|
|
Err(GitConfigError::KeyDoesNotExist("aaaaaa"))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn subsection_must_be_respected() {
|
|
let config = GitConfig::try_from("[core]a=b\n[core.a]a=c").unwrap();
|
|
assert_eq!(
|
|
config.get_raw_value("core", None, "a"),
|
|
Ok(Cow::<[u8]>::Borrowed(b"b"))
|
|
);
|
|
assert_eq!(
|
|
config.get_raw_value("core", Some("a"), "a"),
|
|
Ok(Cow::<[u8]>::Borrowed(b"c"))
|
|
);
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod get_value {
|
|
use super::*;
|
|
use crate::values::{Boolean, TrueVariant, Value};
|
|
use std::error::Error;
|
|
|
|
#[test]
|
|
fn single_section() -> Result<(), Box<dyn Error>> {
|
|
let config = GitConfig::try_from("[core]\na=b\nc").unwrap();
|
|
let first_value: Value = config.get_value("core", None, "a")?;
|
|
let second_value: Boolean = config.get_value("core", None, "c")?;
|
|
|
|
assert_eq!(first_value, Value::Other(Cow::Borrowed(b"b")));
|
|
assert_eq!(second_value, Boolean::True(TrueVariant::Implicit));
|
|
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod get_raw_multi_value {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn single_value_is_identical_to_single_value_query() {
|
|
let config = GitConfig::try_from("[core]\na=b\nc=d").unwrap();
|
|
assert_eq!(
|
|
vec![config.get_raw_value("core", None, "a").unwrap()],
|
|
config.get_raw_multi_value("core", None, "a").unwrap()
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn multi_value_in_section() {
|
|
let config = GitConfig::try_from("[core]\na=b\na=c").unwrap();
|
|
assert_eq!(
|
|
config.get_raw_multi_value("core", None, "a").unwrap(),
|
|
vec![Cow::Borrowed(b"b"), Cow::Borrowed(b"c")]
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn multi_value_across_sections() {
|
|
let config = GitConfig::try_from("[core]\na=b\na=c\n[core]a=d").unwrap();
|
|
assert_eq!(
|
|
config.get_raw_multi_value("core", None, "a").unwrap(),
|
|
vec![
|
|
Cow::Borrowed(b"b"),
|
|
Cow::Borrowed(b"c"),
|
|
Cow::Borrowed(b"d")
|
|
]
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn section_not_found() {
|
|
let config = GitConfig::try_from("[core]\na=b\nc=d").unwrap();
|
|
assert_eq!(
|
|
config.get_raw_multi_value("foo", None, "a"),
|
|
Err(GitConfigError::SectionDoesNotExist("foo"))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn subsection_not_found() {
|
|
let config = GitConfig::try_from("[core]\na=b\nc=d").unwrap();
|
|
assert_eq!(
|
|
config.get_raw_multi_value("core", Some("a"), "a"),
|
|
Err(GitConfigError::SubSectionDoesNotExist(Some("a")))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn key_not_found() {
|
|
let config = GitConfig::try_from("[core]\na=b\nc=d").unwrap();
|
|
assert_eq!(
|
|
config.get_raw_multi_value("core", None, "aaaaaa"),
|
|
Err(GitConfigError::KeyDoesNotExist("aaaaaa"))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn subsection_must_be_respected() {
|
|
let config = GitConfig::try_from("[core]a=b\n[core.a]a=c").unwrap();
|
|
assert_eq!(
|
|
config.get_raw_multi_value("core", None, "a").unwrap(),
|
|
vec![Cow::Borrowed(b"b")]
|
|
);
|
|
assert_eq!(
|
|
config.get_raw_multi_value("core", Some("a"), "a").unwrap(),
|
|
vec![Cow::Borrowed(b"c")]
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn non_relevant_subsection_is_ignored() {
|
|
let config = GitConfig::try_from("[core]\na=b\na=c\n[core]a=d\n[core]g=g").unwrap();
|
|
assert_eq!(
|
|
config.get_raw_multi_value("core", None, "a").unwrap(),
|
|
vec![
|
|
Cow::Borrowed(b"b"),
|
|
Cow::Borrowed(b"c"),
|
|
Cow::Borrowed(b"d")
|
|
]
|
|
);
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod display {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn can_reconstruct_empty_config() {
|
|
let config = r#"
|
|
|
|
"#;
|
|
assert_eq!(GitConfig::try_from(config).unwrap().to_string(), config);
|
|
}
|
|
|
|
#[test]
|
|
fn can_reconstruct_non_empty_config() {
|
|
let config = r#"[user]
|
|
email = code@eddie.sh
|
|
[core]
|
|
autocrlf = input
|
|
[push]
|
|
default = simple
|
|
[commit]
|
|
gpgsign = true
|
|
[gpg]
|
|
program = gpg
|
|
[url "ssh://git@github.com/"]
|
|
insteadOf = "github://"
|
|
[url "ssh://git@git.eddie.sh/edward/"]
|
|
insteadOf = "gitea://"
|
|
[pull]
|
|
ff = only
|
|
[init]
|
|
defaultBranch = master"#;
|
|
|
|
assert_eq!(GitConfig::try_from(config).unwrap().to_string(), config);
|
|
}
|
|
|
|
#[test]
|
|
fn can_reconstruct_configs_with_implicits() {
|
|
let config = r#"[user]
|
|
email
|
|
name
|
|
[core]
|
|
autocrlf
|
|
[push]
|
|
default
|
|
[commit]
|
|
gpgsign"#;
|
|
|
|
assert_eq!(GitConfig::try_from(config).unwrap().to_string(), config);
|
|
}
|
|
|
|
#[test]
|
|
fn can_reconstruct_configs_without_whitespace_in_middle() {
|
|
let config = r#"[core]
|
|
autocrlf=input
|
|
[push]
|
|
default=simple
|
|
[commit]
|
|
gpgsign=true
|
|
[pull]
|
|
ff = only
|
|
[init]
|
|
defaultBranch = master"#;
|
|
|
|
assert_eq!(GitConfig::try_from(config).unwrap().to_string(), config);
|
|
}
|
|
}
|