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optimize section pushing

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This commit is contained in:
Edward Shen 2021-03-08 15:53:16 -05:00
parent 1cde32efd1
commit 3c83e46a30
Signed by: edward
GPG key ID: 19182661E818369F
2 changed files with 99 additions and 87 deletions
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125
src/file.rs
View file

@ -746,7 +746,7 @@ impl<'lookup, 'event> MutableMultiValue<'_, 'lookup, 'event> {
/// with all values instead.
///
/// [`get_raw_value`]: Self::get_raw_value
#[derive(PartialEq, Eq, Clone, Debug)]
#[derive(PartialEq, Eq, Clone, Debug, Default)]
pub struct GitConfig<'a> {
/// The list of events that occur before an actual section. Since a
/// `git-config` file prohibits global values, this vec is limited to only
@ -765,6 +765,11 @@ pub struct GitConfig<'a> {
}
impl<'event> GitConfig<'event> {
/// Constructs an empty `git-config` file.
pub fn new() -> Self {
Self::default()
}
/// Returns an interpreted value given a section, an optional subsection and
/// key.
///
@ -903,18 +908,44 @@ impl<'event> GitConfig<'event> {
))
}
/// Adds a new section to config. This cannot fail.
/// Adds a new section to config. This cannot fail. Returns a reference to
/// the new section for immediate editing.
///
///
/// # Examples
///
/// ```
/// # use git_config::file::{GitConfig, GitConfigError};
/// # use std::convert::TryFrom;
/// let mut git_config = GitConfig::new();
/// let mut section = git_config.new_section("hello", Some("world".into()));
/// assert_eq!(git_config.to_string(), r#"[hello "world"]"#);
/// ```
pub fn new_section(
&mut self,
section_name: impl Into<Cow<'event, str>>,
subsection_name: impl Into<Option<Cow<'event, str>>>,
) -> MutableSection<'_, 'event> {
let subsection_name = subsection_name.into();
if subsection_name.is_some() {
self.push_section(
Some(SectionHeaderName(section_name.into())),
subsection_name.into(),
&mut Some(vec![]),
ParsedSectionHeader {
name: SectionHeaderName(section_name.into()),
separator: Some(" ".into()),
subsection_name,
},
vec![],
)
.unwrap()
} else {
self.push_section(
ParsedSectionHeader {
name: SectionHeaderName(section_name.into()),
separator: None,
subsection_name: None,
},
vec![],
)
}
}
/// Removes the section, returning the events it had, if any. If multiple
@ -1349,20 +1380,18 @@ impl<'event> GitConfig<'event> {
/// Adds a new section to the config file.
fn push_section(
&mut self,
current_section_name: Option<SectionHeaderName<'event>>,
current_subsection_name: Option<Cow<'event, str>>,
maybe_section: &mut Option<Vec<Event<'event>>>,
) -> Option<MutableSection<'_, 'event>> {
if let Some(section) = maybe_section.take() {
// current_section_name: Option<SectionHeaderName<'event>>,
// current_subsection_name: Option<Cow<'event, str>>,
header: ParsedSectionHeader<'event>,
maybe_section: Vec<Event<'event>>,
) -> MutableSection<'_, 'event> {
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();
self.section_headers.insert(new_section_id, header.clone());
self.sections.insert(new_section_id, maybe_section);
let lookup = self.section_lookup_tree.entry(header.name).or_default();
let mut found_node = false;
if let Some(subsection_name) = current_subsection_name {
if let Some(subsection_name) = header.subsection_name {
for node in lookup.iter_mut() {
if let LookupTreeNode::NonTerminal(subsection) = node {
found_node = true;
@ -1393,10 +1422,10 @@ impl<'event> GitConfig<'event> {
}
self.section_order.push_back(new_section_id);
self.section_id_counter += 1;
self.sections.get_mut(&new_section_id).map(MutableSection)
} else {
None
}
self.sections
.get_mut(&new_section_id)
.map(MutableSection)
.unwrap()
}
/// Returns the mapping between section and subsection name to section ids.
@ -1471,57 +1500,40 @@ impl<'a> From<Parser<'a>> for GitConfig<'a> {
};
// Current section that we're building
let mut current_section_name: Option<SectionHeaderName<'_>> = None;
let mut current_subsection_name: Option<Cow<'a, str>> = None;
let mut maybe_section: Option<Vec<Event<'a>>> = None;
let mut prev_section_header = None;
let mut section_events: Vec<Event<'a>> = vec![];
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;
if let Some(prev_header) = prev_section_header.take() {
new_self.push_section(prev_header, section_events);
} else {
new_self.frontmatter_events = section_events;
}
prev_section_header = Some(header);
section_events = vec![];
}
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::KeyValueSeparator => section_events.push(e),
e @ Event::Comment(_) | e @ Event::Newline(_) | e @ Event::Whitespace(_) => {
match maybe_section {
Some(ref mut section) => section.push(e),
None => new_self.frontmatter_events.push(e),
}
section_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,
);
if let Some(header) = prev_section_header {
new_self.push_section(header, section_events);
} else {
new_self.frontmatter_events = section_events;
}
new_self
dbg!(new_self)
}
}
@ -1765,7 +1777,6 @@ mod mutable_multi_value {
.get_raw_multi_value_mut("core", None, "a")
.unwrap();
values.set_string(0, "Hello".to_string());
dbg!(values);
assert_eq!(
git_config.to_string(),
r#"[core]
@ -2074,7 +2085,7 @@ mod from_parser {
#[cfg(test)]
mod get_raw_value {
use super::{Cow, GitConfig, GitConfigError, TryFrom};
use crate::parser::{Key, SectionHeaderName};
use crate::parser::SectionHeaderName;
#[test]
fn single_section() {

1
src/parser.rs
View file

@ -222,6 +222,7 @@ generate_case_insensitive!(
Cow<'a, str>,
"Wrapper struct for section header names, since section headers are case-insensitive."
);
generate_case_insensitive!(
Key,
Cow<'a, str>,