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src/file.rs
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@ -4,7 +4,8 @@ use crate::parser::{
parse_from_bytes, Error, Event, Key, ParsedSectionHeader, Parser, SectionHeaderName, parse_from_bytes, Error, Event, Key, ParsedSectionHeader, Parser, SectionHeaderName,
}; };
use crate::values::{normalize_bytes, normalize_cow, normalize_vec}; use crate::values::{normalize_bytes, normalize_cow, normalize_vec};
use std::borrow::{Borrow, Cow}; use std::borrow::Borrow;
use std::borrow::Cow;
use std::collections::{HashMap, VecDeque}; use std::collections::{HashMap, VecDeque};
use std::convert::TryFrom; use std::convert::TryFrom;
use std::fmt::Display; use std::fmt::Display;
@ -18,9 +19,9 @@ pub enum GitConfigError<'a> {
/// The requested subsection does not exist. /// The requested subsection does not exist.
SubSectionDoesNotExist(Option<&'a str>), SubSectionDoesNotExist(Option<&'a str>),
/// The key does not exist in the requested section. /// The key does not exist in the requested section.
KeyDoesNotExist, KeyDoesNotExist(Key<'a>),
/// The conversion into the provided type for methods such as /// The conversion into the provided type for methods such as
/// [`GitConfig::value`] failed. /// [`GitConfig::get_value`] failed.
FailedConversion, FailedConversion,
} }
@ -32,7 +33,7 @@ impl Display for GitConfigError<'_> {
Some(s) => write!(f, "Subsection '{}' does not exist.", s), Some(s) => write!(f, "Subsection '{}' does not exist.", s),
None => write!(f, "Top level section does not exist."), None => write!(f, "Top level section does not exist."),
}, },
Self::KeyDoesNotExist => write!(f, "The name for a value provided does not exist."), Self::KeyDoesNotExist(k) => write!(f, "Name '{}' does not exist.", k),
Self::FailedConversion => write!(f, "Failed to convert to specified type."), Self::FailedConversion => write!(f, "Failed to convert to specified type."),
} }
} }
@ -54,122 +55,46 @@ impl std::error::Error for GitConfigError<'_> {}
#[derive(PartialEq, Eq, Hash, Copy, Clone, PartialOrd, Ord, Debug)] #[derive(PartialEq, Eq, Hash, Copy, Clone, PartialOrd, Ord, Debug)]
struct SectionId(usize); struct SectionId(usize);
/// A opaque type that represents a mutable reference to a section. #[derive(PartialEq, Eq, Clone, Debug)]
#[derive(PartialEq, Eq, Hash, PartialOrd, Ord, Debug)] enum LookupTreeNode<'a> {
pub struct MutableSection<'borrow, 'event>(&'borrow mut Vec<Event<'event>>); Terminal(Vec<SectionId>),
NonTerminal(HashMap<Cow<'a, str>, Vec<SectionId>>),
}
// Immutable methods, effectively a deref into Section /// An intermediate representation of a mutable value obtained from
impl<'borrow, 'event> MutableSection<'borrow, 'event> { /// [`GitConfig`].
/// Retrieves the last matching value in a section with the given key. ///
/// Returns None if the key was not found. /// This holds a mutable reference to the underlying data structure of
#[inline] /// [`GitConfig`], and thus guarantees through Rust's borrower checker that
#[must_use] /// multiple mutable references to [`GitConfig`] cannot be owned at the same
pub fn value(&self, key: &Key) -> Option<Cow<'event, [u8]>> { /// time.
Section(self.0).value(key) pub struct MutableValue<'borrow, 'lookup, 'event> {
} section: &'borrow mut Vec<Event<'event>>,
key: Key<'lookup>,
index: usize,
size: usize,
}
/// Retrieves the last matching value in a section with the given key, and impl MutableValue<'_, '_, '_> {
/// attempts to convert the value into the provided type. /// Returns the actual value. This is computed each time this is called, so
/// it's best to reuse this value or own it if an allocation is acceptable.
/// ///
/// # Errors /// # Errors
/// ///
/// Returns an error if the key was not found, or if the conversion failed. /// Returns an error if the lookup failed.
#[inline] pub fn get(&self) -> Result<Cow<'_, [u8]>, GitConfigError> {
pub fn value_as<T: TryFrom<Cow<'event, [u8]>>>(
&self,
key: &Key,
) -> Result<T, GitConfigError<'event>> {
Section(self.0).value_as(key)
}
/// Retrieves all values that have the provided key name. This may return
/// an empty vec, which implies there was values with the provided key.
#[inline]
#[must_use]
pub fn values(&self, key: &Key) -> Vec<Cow<'event, [u8]>> {
Section(self.0).values(key)
}
/// Retrieves all values that have the provided key name. This may return
/// an empty vec, which implies there was values with the provided key.
///
/// # Errors
///
/// Returns an error if the conversion failed.
#[inline]
pub fn values_as<T: TryFrom<Cow<'event, [u8]>>>(
&self,
key: &Key,
) -> Result<Vec<T>, GitConfigError<'event>> {
Section(self.0).values_as(key)
}
}
// Mutable methods on a mutable section
impl<'borrow, 'event> MutableSection<'borrow, 'event> {
/// Adds an entry to the end of this section
pub fn push(&mut self, key: Key<'event>, value: Cow<'event, [u8]>) {
self.0.push(Event::Key(key));
self.0.push(Event::KeyValueSeparator);
self.0.push(Event::Value(value));
}
/// Removes all events until a key value pair is removed. This will also
/// remove the whitespace preceding the key value pair, if any is found.
pub fn pop(&mut self) -> Option<(Key, Cow<'event, [u8]>)> {
let mut values = vec![];
// events are popped in reverse order
while let Some(e) = self.0.pop() {
match e {
Event::Key(k) => {
// pop leading whitespace
if let Some(Event::Whitespace(_)) = self.0.last() {
self.0.pop();
}
if values.len() == 1 {
return Some((k, normalize_cow(values.pop().unwrap())));
}
return Some((
k,
normalize_vec(
values
.into_iter()
.rev()
.flat_map(|v: Cow<[u8]>| v.to_vec())
.collect(),
),
));
}
Event::Value(v) | Event::ValueNotDone(v) | Event::ValueDone(v) => values.push(v),
_ => (),
}
}
None
}
}
// Internal methods that require exact indices for faster operations.
impl<'borrow, 'event> MutableSection<'borrow, 'event> {
fn get<'key>(
&self,
key: &Key<'key>,
start: usize,
end: usize,
) -> Result<Cow<'_, [u8]>, GitConfigError<'key>> {
let mut found_key = false; let mut found_key = false;
let mut latest_value = None; let mut latest_value = None;
let mut partial_value = None; let mut partial_value = None;
// section_id is guaranteed to exist in self.sections, else we have a // section_id is guaranteed to exist in self.sections, else we have a
// violated invariant. // violated invariant.
for event in &self.0[start..=end] { for event in &self.section[self.index..=self.index + self.size] {
match event { match event {
Event::Key(event_key) if event_key == key => found_key = true, Event::Key(event_key) if *event_key == self.key => found_key = true,
Event::Value(v) if found_key => { Event::Value(v) if found_key => {
found_key = false; found_key = false;
// Clones the Cow, doesn't copy underlying value if borrowed latest_value = Some(Cow::Borrowed(v.borrow()));
latest_value = Some(v.clone());
} }
Event::ValueNotDone(v) if found_key => { Event::ValueNotDone(v) if found_key => {
latest_value = None; latest_value = None;
@ -186,155 +111,7 @@ impl<'borrow, 'event> MutableSection<'borrow, 'event> {
latest_value latest_value
.map(normalize_cow) .map(normalize_cow)
.or_else(|| partial_value.map(normalize_vec)) .or_else(|| partial_value.map(normalize_vec))
.ok_or(GitConfigError::KeyDoesNotExist) .ok_or(GitConfigError::KeyDoesNotExist(self.key.to_owned()))
}
fn delete(&mut self, start: usize, end: usize) {
self.0.drain(start..=end);
}
fn set_value(&mut self, index: usize, key: Key<'event>, value: Vec<u8>) {
self.0.insert(index, Event::Value(Cow::Owned(value)));
self.0.insert(index, Event::KeyValueSeparator);
self.0.insert(index, Event::Key(key));
}
}
/// A opaque type that represents a reference to a section.
#[derive(PartialEq, Eq, Hash, PartialOrd, Ord, Debug)]
pub struct Section<'borrow, 'event>(&'borrow [Event<'event>]);
impl<'borrow, 'event> Section<'borrow, 'event> {
/// Retrieves the last matching value in a section with the given key.
/// Returns None if the key was not found.
#[must_use]
pub fn value(&self, key: &Key) -> Option<Cow<'event, [u8]>> {
let mut found_key = false;
let mut latest_value = None;
let mut partial_value = None;
// todo: iterate backwards instead
for event in self.0 {
match event {
Event::Key(event_key) if *event_key == *key => found_key = true,
Event::Value(v) if found_key => {
found_key = false;
// Clones the Cow, doesn't copy underlying value if borrowed
latest_value = Some(v.clone());
partial_value = None;
}
Event::ValueNotDone(v) if found_key => {
latest_value = None;
partial_value = Some((*v).to_vec());
}
Event::ValueDone(v) if found_key => {
found_key = false;
partial_value.as_mut().unwrap().extend(&**v);
}
_ => (),
}
}
latest_value.or_else(|| partial_value.map(normalize_vec))
}
/// Retrieves the last matching value in a section with the given key, and
/// attempts to convert the value into the provided type.
///
/// # Errors
///
/// Returns an error if the key was not found, or if the conversion failed.
pub fn value_as<T: TryFrom<Cow<'event, [u8]>>>(
&self,
key: &Key,
) -> Result<T, GitConfigError<'event>> {
T::try_from(self.value(key).ok_or(GitConfigError::KeyDoesNotExist)?)
.map_err(|_| GitConfigError::FailedConversion)
}
/// Retrieves all values that have the provided key name. This may return
/// an empty vec, which implies there was values with the provided key.
#[must_use]
pub fn values(&self, key: &Key) -> Vec<Cow<'event, [u8]>> {
let mut values = vec![];
let mut found_key = false;
let mut partial_value = None;
// This can iterate forwards because we need to iterate over the whole
// section anyways.
for event in self.0 {
match event {
Event::Key(event_key) if event_key == key => found_key = true,
Event::Value(v) if found_key => {
found_key = false;
// Clones the Cow, doesn't copy underlying value if borrowed
values.push(normalize_cow(v.clone()));
partial_value = None;
}
Event::ValueNotDone(v) if found_key => {
partial_value = Some((*v).to_vec());
}
Event::ValueDone(v) if found_key => {
found_key = false;
partial_value.as_mut().unwrap().extend(&**v);
values.push(normalize_cow(Cow::Owned(partial_value.take().unwrap())));
}
_ => (),
}
}
values
}
/// Retrieves all values that have the provided key name. This may return
/// an empty vec, which implies there was values with the provided key.
///
/// # Errors
///
/// Returns an error if the conversion failed.
pub fn values_as<T: TryFrom<Cow<'event, [u8]>>>(
&self,
key: &Key,
) -> Result<Vec<T>, GitConfigError<'event>> {
self.values(key)
.into_iter()
.map(T::try_from)
.collect::<Result<Vec<T>, _>>()
.map_err(|_| GitConfigError::FailedConversion)
}
}
#[derive(PartialEq, Eq, Clone, Debug)]
enum LookupTreeNode<'a> {
Terminal(Vec<SectionId>),
NonTerminal(HashMap<Cow<'a, str>, Vec<SectionId>>),
}
/// An intermediate representation of a mutable value obtained from
/// [`GitConfig`].
///
/// This holds a mutable reference to the underlying data structure of
/// [`GitConfig`], and thus guarantees through Rust's borrower checker that
/// multiple mutable references to [`GitConfig`] cannot be owned at the same
/// time.
pub struct MutableValue<'borrow, 'lookup, 'event> {
section: MutableSection<'borrow, 'event>,
key: Key<'lookup>,
index: usize,
size: usize,
}
impl MutableValue<'_, '_, '_> {
/// Returns the actual value. This is computed each time this is called, so
/// it's best to reuse this value or own it if an allocation is acceptable.
///
/// # Errors
///
/// Returns an error if the lookup failed.
#[inline]
pub fn get(&self) -> Result<Cow<'_, [u8]>, GitConfigError> {
self.section
.get(&self.key, self.index, self.index + self.size)
} }
/// Update the value to the provided one. This modifies the value such that /// Update the value to the provided one. This modifies the value such that
@ -350,18 +127,23 @@ impl MutableValue<'_, '_, '_> {
/// new value. /// new value.
pub fn set_bytes(&mut self, input: Vec<u8>) { pub fn set_bytes(&mut self, input: Vec<u8>) {
if self.size > 0 { if self.size > 0 {
self.section.delete(self.index, self.index + self.size); self.section.drain(self.index..=self.index + self.size);
} }
self.size = 3; self.size = 3;
self.section self.section
.set_value(self.index, Key(Cow::Owned(self.key.to_string())), input); .insert(self.index, Event::Value(Cow::Owned(input)));
self.section.insert(self.index, Event::KeyValueSeparator);
self.section.insert(
self.index,
Event::Key(Key(Cow::Owned(self.key.0.to_string()))),
);
} }
/// Removes the value. Does nothing when called multiple times in /// Removes the value. Does nothing when called multiple times in
/// succession. /// succession.
pub fn delete(&mut self) { pub fn delete(&mut self) {
if self.size > 0 { if self.size > 0 {
self.section.delete(self.index, self.index + self.size); self.section.drain(self.index..=self.index + self.size);
self.size = 0; self.size = 0;
} }
} }
@ -466,7 +248,7 @@ impl<'lookup, 'event> MutableMultiValue<'_, 'lookup, 'event> {
} }
if values.is_empty() { if values.is_empty() {
return Err(GitConfigError::KeyDoesNotExist); return Err(GitConfigError::KeyDoesNotExist(self.key.to_owned()));
} }
Ok(values) Ok(values)
@ -518,7 +300,7 @@ impl<'lookup, 'event> MutableMultiValue<'_, 'lookup, 'event> {
offset_index, offset_index,
} = self.indices_and_sizes[index]; } = self.indices_and_sizes[index];
MutableMultiValue::set_value_inner( MutableMultiValue::set_value_inner(
&self.key, self.key.to_owned(),
&mut self.offsets, &mut self.offsets,
self.section.get_mut(&section_id).unwrap(), self.section.get_mut(&section_id).unwrap(),
section_id, section_id,
@ -545,7 +327,7 @@ impl<'lookup, 'event> MutableMultiValue<'_, 'lookup, 'event> {
) in self.indices_and_sizes.iter().zip(input) ) in self.indices_and_sizes.iter().zip(input)
{ {
Self::set_value_inner( Self::set_value_inner(
&self.key, self.key.to_owned(),
&mut self.offsets, &mut self.offsets,
self.section.get_mut(section_id).unwrap(), self.section.get_mut(section_id).unwrap(),
*section_id, *section_id,
@ -572,7 +354,7 @@ impl<'lookup, 'event> MutableMultiValue<'_, 'lookup, 'event> {
} in &self.indices_and_sizes } in &self.indices_and_sizes
{ {
Self::set_value_inner( Self::set_value_inner(
&self.key, self.key.to_owned(),
&mut self.offsets, &mut self.offsets,
self.section.get_mut(section_id).unwrap(), self.section.get_mut(section_id).unwrap(),
*section_id, *section_id,
@ -595,7 +377,7 @@ impl<'lookup, 'event> MutableMultiValue<'_, 'lookup, 'event> {
} in &self.indices_and_sizes } in &self.indices_and_sizes
{ {
Self::set_value_inner( Self::set_value_inner(
&self.key, self.key.to_owned(),
&mut self.offsets, &mut self.offsets,
self.section.get_mut(section_id).unwrap(), self.section.get_mut(section_id).unwrap(),
*section_id, *section_id,
@ -606,7 +388,7 @@ impl<'lookup, 'event> MutableMultiValue<'_, 'lookup, 'event> {
} }
fn set_value_inner<'a: 'event>( fn set_value_inner<'a: 'event>(
key: &Key<'lookup>, key: Key<'lookup>,
offsets: &mut HashMap<SectionId, Vec<Offset>>, offsets: &mut HashMap<SectionId, Vec<Offset>>,
section: &mut Vec<Event<'event>>, section: &mut Vec<Event<'event>>,
section_id: SectionId, section_id: SectionId,
@ -772,7 +554,7 @@ impl<'event> GitConfig<'event> {
/// the conversion is already implemented, but this function is flexible and /// the conversion is already implemented, but this function is flexible and
/// will accept any type that implements [`TryFrom<&[u8]>`][`TryFrom`]. /// will accept any type that implements [`TryFrom<&[u8]>`][`TryFrom`].
/// ///
/// Consider [`Self::multi_value`] if you want to get all values of a /// Consider [`Self::get_multi_value`] if you want to get all values of a
/// multivar instead. /// multivar instead.
/// ///
/// # Examples /// # Examples
@ -789,9 +571,9 @@ impl<'event> GitConfig<'event> {
/// "#; /// "#;
/// let git_config = GitConfig::try_from(config).unwrap(); /// let git_config = GitConfig::try_from(config).unwrap();
/// // You can either use the turbofish to determine the type... /// // You can either use the turbofish to determine the type...
/// let a_value = git_config.value::<Integer>("core", None, "a")?; /// let a_value = git_config.get_value::<Integer>("core", None, "a")?;
/// // ... or explicitly declare the type to avoid the turbofish /// // ... or explicitly declare the type to avoid the turbofish
/// let c_value: Boolean = git_config.value("core", None, "c")?; /// let c_value: Boolean = git_config.get_value("core", None, "c")?;
/// # Ok::<(), GitConfigError>(()) /// # Ok::<(), GitConfigError>(())
/// ``` /// ```
/// ///
@ -803,7 +585,7 @@ impl<'event> GitConfig<'event> {
/// ///
/// [`values`]: crate::values /// [`values`]: crate::values
/// [`TryFrom`]: std::convert::TryFrom /// [`TryFrom`]: std::convert::TryFrom
pub fn value<'lookup, T: TryFrom<Cow<'event, [u8]>>>( pub fn get_value<'lookup, T: TryFrom<Cow<'event, [u8]>>>(
&'event self, &'event self,
section_name: &'lookup str, section_name: &'lookup str,
subsection_name: Option<&'lookup str>, subsection_name: Option<&'lookup str>,
@ -820,7 +602,7 @@ impl<'event> GitConfig<'event> {
/// the conversion is already implemented, but this function is flexible and /// the conversion is already implemented, but this function is flexible and
/// will accept any type that implements [`TryFrom<&[u8]>`][`TryFrom`]. /// will accept any type that implements [`TryFrom<&[u8]>`][`TryFrom`].
/// ///
/// Consider [`Self::value`] if you want to get a single value /// Consider [`Self::get_value`] if you want to get a single value
/// (following last-one-wins resolution) instead. /// (following last-one-wins resolution) instead.
/// ///
/// # Examples /// # Examples
@ -840,7 +622,7 @@ impl<'event> GitConfig<'event> {
/// "#; /// "#;
/// let git_config = GitConfig::try_from(config).unwrap(); /// let git_config = GitConfig::try_from(config).unwrap();
/// // You can either use the turbofish to determine the type... /// // You can either use the turbofish to determine the type...
/// let a_value = git_config.multi_value::<Boolean>("core", None, "a")?; /// let a_value = git_config.get_multi_value::<Boolean>("core", None, "a")?;
/// assert_eq!( /// assert_eq!(
/// a_value, /// a_value,
/// vec![ /// vec![
@ -850,7 +632,7 @@ impl<'event> GitConfig<'event> {
/// ] /// ]
/// ); /// );
/// // ... or explicitly declare the type to avoid the turbofish /// // ... or explicitly declare the type to avoid the turbofish
/// let c_value: Vec<Value> = git_config.multi_value("core", None, "c")?; /// let c_value: Vec<Value> = git_config.get_multi_value("core", None, "c")?;
/// assert_eq!(c_value, vec![Value::Other(Cow::Borrowed(b"g"))]); /// assert_eq!(c_value, vec![Value::Other(Cow::Borrowed(b"g"))]);
/// # Ok::<(), GitConfigError>(()) /// # Ok::<(), GitConfigError>(())
/// ``` /// ```
@ -863,7 +645,7 @@ impl<'event> GitConfig<'event> {
/// ///
/// [`values`]: crate::values /// [`values`]: crate::values
/// [`TryFrom`]: std::convert::TryFrom /// [`TryFrom`]: std::convert::TryFrom
pub fn multi_value<'lookup, T: TryFrom<Cow<'event, [u8]>>>( pub fn get_multi_value<'lookup, T: TryFrom<Cow<'event, [u8]>>>(
&'event self, &'event self,
section_name: &'lookup str, section_name: &'lookup str,
subsection_name: Option<&'lookup str>, subsection_name: Option<&'lookup str>,
@ -876,68 +658,6 @@ impl<'event> GitConfig<'event> {
.map_err(|_| GitConfigError::FailedConversion) .map_err(|_| GitConfigError::FailedConversion)
} }
/// Returns an immutable section reference.
pub fn section<'lookup>(
&mut self,
section_name: &'lookup str,
subsection_name: Option<&'lookup str>,
) -> Result<Section, GitConfigError<'lookup>> {
let section_ids =
self.get_section_ids_by_name_and_subname(section_name, subsection_name)?;
Ok(Section(
self.sections.get(section_ids.last().unwrap()).unwrap(),
))
}
/// Returns an mutable section reference.
pub fn section_mut<'lookup>(
&mut self,
section_name: &'lookup str,
subsection_name: Option<&'lookup str>,
) -> Result<MutableSection<'_, 'event>, GitConfigError<'lookup>> {
let section_ids =
self.get_section_ids_by_name_and_subname(section_name, subsection_name)?;
Ok(MutableSection(
self.sections.get_mut(section_ids.last().unwrap()).unwrap(),
))
}
/// Adds a new section to config. This cannot fail.
pub fn new_section(
&mut self,
section_name: impl Into<Cow<'event, str>>,
subsection_name: impl Into<Option<Cow<'event, str>>>,
) -> MutableSection<'_, 'event> {
self.push_section(
Some(SectionHeaderName(section_name.into())),
subsection_name.into(),
&mut Some(vec![]),
)
.unwrap()
}
/// Removes the section, returning the events it had, if any. If multiple
/// sections have the same name, then the last one is returned.
pub fn remove_section<'lookup>(
&mut self,
section_name: &'lookup str,
subsection_name: impl Into<Option<&'lookup str>>,
) -> Option<Vec<Event>> {
let section_ids =
self.get_section_ids_by_name_and_subname(section_name, subsection_name.into());
let section_ids = section_ids.ok()?.pop()?;
self.sections.remove(&section_ids)
}
}
/// # Raw value API
///
/// These functions are the raw value API. Instead of returning Rust structures,
/// these functions return bytes which may or may not be owned. Generally
/// speaking, you shouldn't need to use these functions, but are exposed in case
/// the higher level functions are deficient.
impl<'event> GitConfig<'event> {
/// Returns an uninterpreted value given a section, an optional subsection /// Returns an uninterpreted value given a section, an optional subsection
/// and key. /// and key.
/// ///
@ -957,18 +677,42 @@ impl<'event> GitConfig<'event> {
// Note: cannot wrap around the raw_multi_value method because we need // Note: cannot wrap around the raw_multi_value method because we need
// to guarantee that the highest section id is used (so that we follow // to guarantee that the highest section id is used (so that we follow
// the "last one wins" resolution strategy by `git-config`). // the "last one wins" resolution strategy by `git-config`).
let section_ids =
self.get_section_ids_by_name_and_subname(section_name, subsection_name)?;
let key = Key(key.into()); let key = Key(key.into());
for section_id in self
.get_section_ids_by_name_and_subname(section_name, subsection_name)? for section_id in section_ids.iter().rev() {
.iter() let mut found_key = false;
.rev() let mut latest_value = None;
{ let mut partial_value = None;
if let Some(v) = Section(self.sections.get(section_id).unwrap()).value(&key) {
return Ok(v.to_vec().into()); // section_id is guaranteed to exist in self.sections, else we have a
// violated invariant.
for event in self.sections.get(section_id).unwrap() {
match event {
Event::Key(event_key) if *event_key == key => found_key = true,
Event::Value(v) if found_key => {
found_key = false;
latest_value = Some(Cow::Borrowed(v.borrow()));
partial_value = None;
}
Event::ValueNotDone(v) if found_key => {
latest_value = None;
partial_value = Some((*v).to_vec());
}
Event::ValueDone(v) if found_key => {
found_key = false;
partial_value.as_mut().unwrap().extend(&**v);
}
_ => (),
}
}
if let Some(v) = latest_value.or_else(|| partial_value.map(normalize_vec)) {
return Ok(v);
} }
} }
Err(GitConfigError::KeyDoesNotExist) Err(GitConfigError::KeyDoesNotExist(key))
} }
/// Returns a mutable reference to an uninterpreted value given a section, /// Returns a mutable reference to an uninterpreted value given a section,
@ -1020,14 +764,14 @@ impl<'event> GitConfig<'event> {
} }
return Ok(MutableValue { return Ok(MutableValue {
section: MutableSection(self.sections.get_mut(section_id).unwrap()), section: self.sections.get_mut(section_id).unwrap(),
key, key,
size, size,
index, index,
}); });
} }
Err(GitConfigError::KeyDoesNotExist) Err(GitConfigError::KeyDoesNotExist(key))
} }
/// Returns all uninterpreted values given a section, an optional subsection /// Returns all uninterpreted values given a section, an optional subsection
@ -1079,16 +823,32 @@ impl<'event> GitConfig<'event> {
let key = Key(key.into()); let key = Key(key.into());
let mut values = vec![]; let mut values = vec![];
for section_id in self.get_section_ids_by_name_and_subname(section_name, subsection_name)? { for section_id in self.get_section_ids_by_name_and_subname(section_name, subsection_name)? {
values.extend( let mut found_key = false;
Section(self.sections.get(&section_id).unwrap()) let mut partial_value = None;
.values(&key) // section_id is guaranteed to exist in self.sections, else we
.iter() // have a violated invariant.
.map(|v| Cow::Owned(v.to_vec())), for event in self.sections.get(&section_id).unwrap() {
); match event {
Event::Key(event_key) if *event_key == key => found_key = true,
Event::Value(v) if found_key => {
values.push(normalize_bytes(v));
found_key = false;
}
Event::ValueNotDone(v) if found_key => {
partial_value = Some((*v).to_vec());
}
Event::ValueDone(v) if found_key => {
found_key = false;
partial_value.as_mut().unwrap().extend(&**v);
values.push(normalize_vec(partial_value.take().unwrap()));
}
_ => (),
}
}
} }
if values.is_empty() { if values.is_empty() {
Err(GitConfigError::KeyDoesNotExist) Err(GitConfigError::KeyDoesNotExist(key))
} else { } else {
Ok(values) Ok(values)
} }
@ -1194,7 +954,7 @@ impl<'event> GitConfig<'event> {
entries.sort(); entries.sort();
if entries.is_empty() { if entries.is_empty() {
Err(GitConfigError::KeyDoesNotExist) Err(GitConfigError::KeyDoesNotExist(key))
} else { } else {
Ok(MutableMultiValue { Ok(MutableMultiValue {
section: &mut self.sections, section: &mut self.sections,
@ -1342,17 +1102,43 @@ impl<'event> GitConfig<'event> {
self.get_raw_multi_value_mut(section_name, subsection_name, key) self.get_raw_multi_value_mut(section_name, subsection_name, key)
.map(|mut v| v.set_values(new_values)) .map(|mut v| v.set_values(new_values))
} }
/// Adds a new section to config. This cannot fail.
pub fn new_empty_section(
&mut self,
section_name: impl Into<Cow<'event, str>>,
subsection_name: impl Into<Option<Cow<'event, str>>>,
) {
self.push_section(
Some(SectionHeaderName(section_name.into())),
subsection_name.into(),
&mut Some(vec![]),
)
}
/// Removes the section, returning the events it had, if any.
pub fn remove_section<'lookup>(
&mut self,
section_name: &'lookup str,
subsection_name: impl Into<Option<&'lookup str>>,
) -> Option<Vec<Event>> {
let section_ids =
self.get_section_ids_by_name_and_subname(section_name, subsection_name.into());
let section_ids = section_ids.ok()?.pop()?;
self.sections.remove(&section_ids)
}
} }
/// Private helper functions /// Private helper functions
impl<'event> GitConfig<'event> { impl<'event> GitConfig<'event> {
/// Adds a new section to the config file. /// Used during initialization.
fn push_section( fn push_section(
&mut self, &mut self,
current_section_name: Option<SectionHeaderName<'event>>, current_section_name: Option<SectionHeaderName<'event>>,
current_subsection_name: Option<Cow<'event, str>>, current_subsection_name: Option<Cow<'event, str>>,
maybe_section: &mut Option<Vec<Event<'event>>>, maybe_section: &mut Option<Vec<Event<'event>>>,
) -> Option<MutableSection<'_, 'event>> { ) {
if let Some(section) = maybe_section.take() { if let Some(section) = maybe_section.take() {
let new_section_id = SectionId(self.section_id_counter); let new_section_id = SectionId(self.section_id_counter);
self.sections.insert(new_section_id, section); self.sections.insert(new_section_id, section);
@ -1367,7 +1153,10 @@ impl<'event> GitConfig<'event> {
if let LookupTreeNode::NonTerminal(subsection) = node { if let LookupTreeNode::NonTerminal(subsection) = node {
found_node = true; found_node = true;
subsection subsection
// Clones the cow, not the inner borrowed str. // Despite the clone `push_section` is always called
// with a Cow::Borrowed, so this is effectively a
// copy. This copy might not be necessary, but need
// to work around borrowck to figure it out.
.entry(subsection_name.clone()) .entry(subsection_name.clone())
.or_default() .or_default()
.push(new_section_id); .push(new_section_id);
@ -1393,9 +1182,6 @@ impl<'event> GitConfig<'event> {
} }
self.section_order.push_back(new_section_id); self.section_order.push_back(new_section_id);
self.section_id_counter += 1; self.section_id_counter += 1;
self.sections.get_mut(&new_section_id).map(MutableSection)
} else {
None
} }
} }
@ -2132,7 +1918,7 @@ mod get_raw_value {
let config = GitConfig::try_from("[core]\na=b\nc=d").unwrap(); let config = GitConfig::try_from("[core]\na=b\nc=d").unwrap();
assert_eq!( assert_eq!(
config.get_raw_value("core", None, "aaaaaa"), config.get_raw_value("core", None, "aaaaaa"),
Err(GitConfigError::KeyDoesNotExist) Err(GitConfigError::KeyDoesNotExist(Key("aaaaaa".into())))
); );
} }
@ -2159,8 +1945,8 @@ mod get_value {
#[test] #[test]
fn single_section() -> Result<(), Box<dyn Error>> { fn single_section() -> Result<(), Box<dyn Error>> {
let config = GitConfig::try_from("[core]\na=b\nc").unwrap(); let config = GitConfig::try_from("[core]\na=b\nc").unwrap();
let first_value: Value = config.value("core", None, "a")?; let first_value: Value = config.get_value("core", None, "a")?;
let second_value: Boolean = config.value("core", None, "c")?; let second_value: Boolean = config.get_value("core", None, "c")?;
assert_eq!(first_value, Value::Other(Cow::Borrowed(b"b"))); assert_eq!(first_value, Value::Other(Cow::Borrowed(b"b")));
assert_eq!(second_value, Boolean::True(TrueVariant::Implicit)); assert_eq!(second_value, Boolean::True(TrueVariant::Implicit));
@ -2172,7 +1958,7 @@ mod get_value {
#[cfg(test)] #[cfg(test)]
mod get_raw_multi_value { mod get_raw_multi_value {
use super::{Cow, GitConfig, GitConfigError, TryFrom}; use super::{Cow, GitConfig, GitConfigError, TryFrom};
use crate::parser::SectionHeaderName; use crate::parser::{Key, SectionHeaderName};
#[test] #[test]
fn single_value_is_identical_to_single_value_query() { fn single_value_is_identical_to_single_value_query() {
@ -2230,7 +2016,7 @@ mod get_raw_multi_value {
let config = GitConfig::try_from("[core]\na=b\nc=d").unwrap(); let config = GitConfig::try_from("[core]\na=b\nc=d").unwrap();
assert_eq!( assert_eq!(
config.get_raw_multi_value("core", None, "aaaaaa"), config.get_raw_multi_value("core", None, "aaaaaa"),
Err(GitConfigError::KeyDoesNotExist) Err(GitConfigError::KeyDoesNotExist(Key("aaaaaa".into())))
); );
} }

32
tests/integration_tests/file_integeration_test.rs
View file

@ -20,17 +20,17 @@ fn get_value_for_all_provided_values() -> Result<(), Box<dyn std::error::Error>>
let file = GitConfig::try_from(config)?; let file = GitConfig::try_from(config)?;
assert_eq!( assert_eq!(
file.value::<Boolean>("core", None, "bool-explicit")?, file.get_value::<Boolean>("core", None, "bool-explicit")?,
Boolean::False(Cow::Borrowed("false")) Boolean::False(Cow::Borrowed("false"))
); );
assert_eq!( assert_eq!(
file.value::<Boolean>("core", None, "bool-implicit")?, file.get_value::<Boolean>("core", None, "bool-implicit")?,
Boolean::True(TrueVariant::Implicit) Boolean::True(TrueVariant::Implicit)
); );
assert_eq!( assert_eq!(
file.value::<Integer>("core", None, "integer-no-prefix")?, file.get_value::<Integer>("core", None, "integer-no-prefix")?,
Integer { Integer {
value: 10, value: 10,
suffix: None suffix: None
@ -38,7 +38,7 @@ fn get_value_for_all_provided_values() -> Result<(), Box<dyn std::error::Error>>
); );
assert_eq!( assert_eq!(
file.value::<Integer>("core", None, "integer-no-prefix")?, file.get_value::<Integer>("core", None, "integer-no-prefix")?,
Integer { Integer {
value: 10, value: 10,
suffix: None suffix: None
@ -46,7 +46,7 @@ fn get_value_for_all_provided_values() -> Result<(), Box<dyn std::error::Error>>
); );
assert_eq!( assert_eq!(
file.value::<Integer>("core", None, "integer-prefix")?, file.get_value::<Integer>("core", None, "integer-prefix")?,
Integer { Integer {
value: 10, value: 10,
suffix: Some(IntegerSuffix::Gibi), suffix: Some(IntegerSuffix::Gibi),
@ -54,7 +54,7 @@ fn get_value_for_all_provided_values() -> Result<(), Box<dyn std::error::Error>>
); );
assert_eq!( assert_eq!(
file.value::<Color>("core", None, "color")?, file.get_value::<Color>("core", None, "color")?,
Color { Color {
foreground: Some(ColorValue::BrightGreen), foreground: Some(ColorValue::BrightGreen),
background: Some(ColorValue::Red), background: Some(ColorValue::Red),
@ -63,7 +63,7 @@ fn get_value_for_all_provided_values() -> Result<(), Box<dyn std::error::Error>>
); );
assert_eq!( assert_eq!(
file.value::<Value>("core", None, "other")?, file.get_value::<Value>("core", None, "other")?,
Value::Other(Cow::Borrowed(b"hello world")) Value::Other(Cow::Borrowed(b"hello world"))
); );
@ -86,12 +86,12 @@ fn get_value_looks_up_all_sections_before_failing() -> Result<(), Box<dyn std::e
// Checks that we check the last entry first still // Checks that we check the last entry first still
assert_eq!( assert_eq!(
file.value::<Boolean>("core", None, "bool-implicit")?, file.get_value::<Boolean>("core", None, "bool-implicit")?,
Boolean::True(TrueVariant::Implicit) Boolean::True(TrueVariant::Implicit)
); );
assert_eq!( assert_eq!(
file.value::<Boolean>("core", None, "bool-explicit")?, file.get_value::<Boolean>("core", None, "bool-explicit")?,
Boolean::False(Cow::Borrowed("false")) Boolean::False(Cow::Borrowed("false"))
); );
@ -102,10 +102,12 @@ fn get_value_looks_up_all_sections_before_failing() -> Result<(), Box<dyn std::e
fn section_names_are_case_insensitive() -> Result<(), Box<dyn std::error::Error>> { fn section_names_are_case_insensitive() -> Result<(), Box<dyn std::error::Error>> {
let config = "[core] bool-implicit"; let config = "[core] bool-implicit";
let file = GitConfig::try_from(config)?; let file = GitConfig::try_from(config)?;
assert!(file.value::<Boolean>("core", None, "bool-implicit").is_ok()); assert!(file
.get_value::<Boolean>("core", None, "bool-implicit")
.is_ok());
assert_eq!( assert_eq!(
file.value::<Boolean>("core", None, "bool-implicit"), file.get_value::<Boolean>("core", None, "bool-implicit"),
file.value::<Boolean>("CORE", None, "bool-implicit") file.get_value::<Boolean>("CORE", None, "bool-implicit")
); );
Ok(()) Ok(())
@ -117,10 +119,10 @@ fn value_names_are_case_insensitive() -> Result<(), Box<dyn std::error::Error>>
a = true a = true
A = false"; A = false";
let file = GitConfig::try_from(config)?; let file = GitConfig::try_from(config)?;
assert_eq!(file.multi_value::<Boolean>("core", None, "a")?.len(), 2); assert_eq!(file.get_multi_value::<Boolean>("core", None, "a")?.len(), 2);
assert_eq!( assert_eq!(
file.value::<Boolean>("core", None, "a"), file.get_value::<Boolean>("core", None, "a"),
file.value::<Boolean>("core", None, "A") file.get_value::<Boolean>("core", None, "A")
); );
Ok(()) Ok(())