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mod git_config_entry;
pub use git_config_entry::{GitConfigEntry, GitRemoteRepo};
use regex::Regex;
use std::collections::HashMap;
use std::env;
#[cfg(test)]
use std::path::Path;
use std::process;
use lazy_static::lazy_static;
pub struct GitConfig {
config: git2::Config,
config_from_env_var: HashMap<String, String>,
pub enabled: bool,
pub repo: Option<git2::Repository>,
}
impl GitConfig {
pub fn try_create() -> Option<Self> {
let repo = match std::env::current_dir() {
Ok(dir) => git2::Repository::discover(dir).ok(),
_ => None,
};
let config = match &repo {
Some(repo) => repo.config().ok(),
None => git2::Config::open_default().ok(),
};
match config {
Some(mut config) => {
let config = config.snapshot().unwrap_or_else(|err| {
eprintln!("Failed to read git config: {}", err);
process::exit(1)
});
Some(Self {
config,
config_from_env_var: parse_config_from_env_var(),
repo,
enabled: true,
})
}
None => None,
}
}
#[cfg(test)]
pub fn from_path(path: &Path, honor_env_var: bool) -> Self {
Self {
config: git2::Config::open(path).unwrap(),
config_from_env_var: if honor_env_var {
parse_config_from_env_var()
} else {
HashMap::new()
},
repo: None,
enabled: true,
}
}
pub fn get<T>(&self, key: &str) -> Option<T>
where
T: GitConfigGet,
{
if self.enabled {
T::git_config_get(key, self)
} else {
None
}
}
}
fn parse_config_from_env_var() -> HashMap<String, String> {
if let Ok(s) = env::var("GIT_CONFIG_PARAMETERS") {
parse_config_from_env_var_value(&s)
} else {
HashMap::new()
}
}
lazy_static! {
static ref GIT_CONFIG_PARAMETERS_REGEX: Regex =
Regex::new(r"'(delta\.[a-z-]+)=([^']+)'").unwrap();
}
fn parse_config_from_env_var_value(s: &str) -> HashMap<String, String> {
GIT_CONFIG_PARAMETERS_REGEX
.captures_iter(s)
.map(|captures| (captures[1].to_string(), captures[2].to_string()))
.collect()
}
pub trait GitConfigGet {
fn git_config_get(key: &str, git_config: &GitConfig) -> Option<Self>
where
Self: Sized;
}
impl GitConfigGet for String {
fn git_config_get(key: &str, git_config: &GitConfig) -> Option<Self> {
match git_config.config_from_env_var.get(key) {
Some(val) => Some(val.to_string()),
None => git_config.config.get_string(key).ok(),
}
}
}
impl GitConfigGet for Option<String> {
fn git_config_get(key: &str, git_config: &GitConfig) -> Option<Self> {
match git_config.config_from_env_var.get(key) {
Some(val) => Some(Some(val.to_string())),
None => match git_config.config.get_string(key) {
Ok(val) => Some(Some(val)),
_ => None,
},
}
}
}
impl GitConfigGet for bool {
fn git_config_get(key: &str, git_config: &GitConfig) -> Option<Self> {
match git_config.config_from_env_var.get(key).map(|s| s.as_str()) {
Some("true") => Some(true),
Some("false") => Some(false),
_ => git_config.config.get_bool(key).ok(),
}
}
}
impl GitConfigGet for usize {
fn git_config_get(key: &str, git_config: &GitConfig) -> Option<Self> {
if let Some(s) = git_config.config_from_env_var.get(key) {
if let Ok(n) = s.parse::<usize>() {
return Some(n);
}
}
match git_config.config.get_i64(key) {
Ok(value) => Some(value as usize),
_ => None,
}
}
}
impl GitConfigGet for f64 {
fn git_config_get(key: &str, git_config: &GitConfig) -> Option<Self> {
if let Some(s) = git_config.config_from_env_var.get(key) {
if let Ok(n) = s.parse::<f64>() {
return Some(n);
}
}
match git_config.config.get_string(key) {
Ok(value) => value.parse::<f64>().ok(),
_ => None,
}
}
}
#[cfg(test)]
mod tests {
use super::parse_config_from_env_var_value;
#[test]
fn test_parse_config_from_env_var_value() {
// To generate test cases, use git -c ... with
// [core]
// pager = env | grep GIT_CONFIG_PARAMETERS
let config = parse_config_from_env_var_value("'user.name=xxx'");
assert!(config.is_empty());
let config = parse_config_from_env_var_value("'delta.plus-style=green'");
assert_eq!(config["delta.plus-style"], "green");
let config = parse_config_from_env_var_value(
r##"'user.name=xxx' 'delta.hunk-header-line-number-style=red "#067a00"'"##,
);
assert_eq!(
config["delta.hunk-header-line-number-style"],
r##"red "#067a00""##
);
let config =
parse_config_from_env_var_value(r##"'user.name=xxx' 'delta.side-by-side=false'"##);
assert_eq!(config["delta.side-by-side"], "false");
let config = parse_config_from_env_var_value(
r##"'delta.plus-style=green' 'delta.side-by-side=false' 'delta.hunk-header-line-number-style=red "#067a00"'"##,
);
assert_eq!(config["delta.plus-style"], "green");
assert_eq!(config["delta.side-by-side"], "false");
assert_eq!(
config["delta.hunk-header-line-number-style"],
r##"red "#067a00""##
);
}
}
|
