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use crate::error::SiteError;
use regex::Regex;
use std::collections::HashMap;
use std::path::{Path, PathBuf};
use std::process::Command;
use std::time::{Duration, SystemTime, UNIX_EPOCH};
pub fn git(args: &[&str], cwd: &Path) -> Result<String, SiteError> {
assert!(!args.is_empty());
let output = Command::new("git")
.args(args)
.current_dir(cwd)
.output()
.map_err(|e| SiteError::GitInvoke(args[0].into(), cwd.into(), e))?;
if output.status.success() {
Ok(String::from_utf8_lossy(&output.stdout).into())
} else {
let stderr = String::from_utf8_lossy(&output.stderr).into();
Err(SiteError::GitError(args[0].into(), cwd.into(), stderr))
}
}
pub fn git_whatchanged(cwd: &Path) -> Result<HashMap<PathBuf, SystemTime>, SiteError> {
let mut files = HashMap::new();
if cwd.join(".git").is_dir() {
let output = git(&["whatchanged", "--pretty=format:%ad", "--date=unix"], cwd)?;
let timepat = Regex::new(r#"^(?P<secs>\d+)$"#).expect("regex compilation");
let filepat = Regex::new(r#"^:\S+ \S+ \S+ \S+ (?P<flag>\S)\t(?P<filename>\S+)$"#)
.expect("regex compilation");
let mut mtime = None;
for line in output.lines() {
if let Some(caps) = timepat.captures(line) {
let secs = caps.name("secs").unwrap().as_str();
let timestamp = secs
.parse::<u64>()
.map_err(|e| SiteError::ParseUnixTimestamp(secs.into(), e))?;
mtime = Some(UNIX_EPOCH + Duration::new(timestamp, 0));
} else if let Some(caps) = filepat.captures(line) {
let flag = caps.name("flag").unwrap().as_str();
let filename = PathBuf::from(caps.name("filename").unwrap().as_str());
if (flag == "M" || flag == "A") && !files.contains_key(&filename) {
assert!(mtime.is_some());
files.insert(filename, mtime.unwrap());
}
} else if line.trim().is_empty() {
mtime = None;
}
}
}
Ok(files)
}
pub fn git_dirty(cwd: &Path) -> Result<Vec<PathBuf>, SiteError> {
let mut dirty = vec![];
if cwd.join(".git").is_dir() {
let output = git(&["status", "--short"], cwd)?;
let pat = Regex::new(r#"^.(?P<status>.) (?P<filename>\S.+)$"#).expect("regex compilation");
for line in output.lines() {
if let Some(caps) = pat.captures(line) {
let status = GitStatus::from(caps.name("status").unwrap().as_str());
let filename = caps.name("filename").unwrap().as_str();
if status == GitStatus::Dirty {
dirty.push(filename.into());
}
}
}
}
Ok(dirty)
}
#[derive(Debug, Eq, PartialEq)]
pub enum GitStatus {
Clean,
Dirty,
Unknown,
}
impl From<&str> for GitStatus {
fn from(status: &str) -> Self {
match status {
"M" => Self::Dirty,
"?" => Self::Unknown,
_ => Self::Clean,
}
}
}
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