dedup multivar docs
parent
bac41a802a
commit
48d41b81e9
GPG Key ID:
19182661E818369F
153
src/config.rs
153
src/config.rs
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@ -52,6 +52,47 @@ enum LookupTreeNode<'a> {
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NonTerminal(HashMap<Cow<'a, BStr>, Vec<SectionId>>),
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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 only one fetch value (such as [`get_raw_value`]) to
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/// fetch `a` with the above config will return `d`, since the last valid config
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/// value is `a = d`:
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///
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/// ```
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/// # use git_config::config::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".into())));
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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_value`]: Self::get_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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@ -126,45 +167,11 @@ impl<'a> GitConfig<'a> {
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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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/// # 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 this function to fetch `a` with the above config will return
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/// `d`, since the last valid config value is `a = d`:
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///
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/// ```
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/// # use git_config::config::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".into())));
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/// ```
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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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/// 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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/// Fetching a config value
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/// ```
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/// # use git_config::config::{GitConfig, GitConfigError};
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/// # use git_config::values::{Integer, Value, Boolean};
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@ -217,43 +224,6 @@ impl<'a> GitConfig<'a> {
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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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/// # 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 this function to fetch `a` with the above config will return
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/// `d`, since the last valid config value is `a = d`:
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///
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/// ```
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/// # use git_config::config::{GitConfig, GitConfigError};
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/// # use git_config::values::Value;
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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_value::<Value, _>("core", None, "a")?,
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/// Value::Other(Cow::Borrowed("d".into()))
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/// );
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/// # Ok::<(), GitConfigError>(())
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/// ```
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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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@ -298,43 +268,6 @@ impl<'a> GitConfig<'a> {
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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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/// # 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 this function to fetch `a` with the above config will return
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/// `d`, since the last valid config value is `a = d`:
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///
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/// ```
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/// # use git_config::config::{GitConfig, GitConfigError};
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/// # use std::borrow::Cow;
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/// # use bstr::BStr;
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/// # use std::convert::TryFrom;
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/// # let mut git_config = GitConfig::try_from("[core]a=b\n[core]\na=c\na=d").unwrap();
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/// let mut mut_value = git_config.get_raw_value_mut("core", None, "a")?;
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/// assert_eq!(mut_value, &mut Cow::<BStr>::Borrowed("d".into()));
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/// *mut_value = Cow::Borrowed("hello".into());
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/// assert_eq!(git_config.get_raw_value("core", None, "a"), Ok(&Cow::Borrowed("hello".into())));
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/// # Ok::<(), GitConfigError>(())
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/// ```
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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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