use anyhow::Result;
use std::fs;
use std::fs::OpenOptions;
use std::io::Write;
use std::path::{Path, PathBuf};
use std::process::Command;
#[derive(Debug, Clone)]
pub struct RepoState {
pub files: Vec<FileStatus>,
pub timeline: Vec<TimelineEntry>,
pub selected_file: usize,
}
#[derive(Debug, Clone)]
pub struct FileStatus {
pub path: String,
pub status: String,
}
#[derive(Debug, Clone)]
pub struct TimelineEntry {
pub rid: String,
pub user: String,
pub message: String,
pub date: String,
}
#[derive(Debug)]
pub enum FossilError {
NotRepository,
CommandFailed(String),
}
impl std::fmt::Display for FossilError {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
FossilError::NotRepository => write!(f, "not a fossil repository"),
FossilError::CommandFailed(msg) => write!(f, "{}", msg),
}
}
}
impl std::error::Error for FossilError {}
pub struct FossilClient {
checkout_root: Option<PathBuf>,
}
impl FossilClient {
pub fn new() -> Self {
Self { checkout_root: None }
}
pub fn checkout_root_path(&self) -> Option<&Path> {
self.checkout_root.as_deref()
}
pub fn repo_state(&mut self) -> std::result::Result<RepoState, FossilError> {
self.ensure_repo()?;
self.checkout_root = Some(self.checkout_root()?);
let status = self.run(&["status"])?;
let tracked = self.run(&["ls"])?;
let extras = self.run(&["extras", "--dotfiles"]).unwrap_or_default();
let timeline = self.history_timeline(None).unwrap_or_default();
Ok(RepoState {
files: merge_files(parse_tracked(&tracked), parse_status(&status), parse_extra(&extras)),
timeline,
selected_file: 0,
})
}
pub fn diff_for(&self, path: &str) -> std::result::Result<String, FossilError> {
self.run(&["diff", "--", path])
}
pub fn sync(&self) -> std::result::Result<String, FossilError> {
self.run(&["sync"])
}
pub fn history_timeline(
&self,
path: Option<&str>,
) -> std::result::Result<Vec<TimelineEntry>, FossilError> {
let mut args: Vec<String> = vec!["timeline", "-n", "20", "-t", "ci", "-F", "%h|%a|%d|%c"]
.into_iter()
.map(|s| s.to_string())
.collect();
if let Some(path) = path {
args.push("-p".to_string());
args.push(path.to_string());
}
let arg_refs: Vec<&str> = args.iter().map(|s| s.as_str()).collect();
let output = self.run(&arg_refs)?;
Ok(parse_timeline(&output))
}
pub fn add_files(&self, paths: &[String]) -> std::result::Result<String, FossilError> {
self.run(&build_add_args(paths))
}
pub fn commit_paths(
&self,
paths: &[String],
message: &str,
) -> std::result::Result<String, FossilError> {
self.run(&build_commit_args(paths, message))
}
pub fn commit_all(&self, message: &str) -> std::result::Result<String, FossilError> {
self.run(&["commit", "-m", message])
}
pub fn ignore_glob(&self, pattern: &str) -> std::result::Result<String, FossilError> {
let root = self.checkout_root.as_deref().ok_or(FossilError::NotRepository)?;
update_ignore_file(root, pattern).map_err(|e| FossilError::CommandFailed(e.to_string()))?;
Ok(format!("ignored {}", pattern))
}
pub fn discard_file(&self, path: &str) -> std::result::Result<String, FossilError> {
self.run(&["revert", "--", path])
}
pub fn set_binary_glob(&self, pattern: &str) -> std::result::Result<String, FossilError> {
self.run(&["settings", "binary-glob", pattern])
}
pub fn cat_file(&self, path: &str) -> std::result::Result<String, FossilError> {
self.run(&["cat", path])
}
pub fn ensure_repo(&self) -> std::result::Result<(), FossilError> {
self.run(&["info"]).map(|_| ())
}
fn checkout_root(&self) -> std::result::Result<PathBuf, FossilError> {
let mut command = Command::new("fossil");
command.arg("info");
let output = command.output().map_err(|e| FossilError::CommandFailed(e.to_string()))?;
let info = String::from_utf8_lossy(&output.stdout);
for line in info.lines() {
if let Some(root) = line.strip_prefix("local-root:") {
return Ok(Path::new(root.trim()).to_path_buf());
}
}
Err(FossilError::CommandFailed("unable to determine checkout root".to_string()))
}
fn run(&self, args: &[&str]) -> std::result::Result<String, FossilError> {
let cmdline = format!("fossil {}", args.join(" "));
let mut command = Command::new("fossil");
command.args(args);
if let Some(root) = self.checkout_root.as_deref() {
command.current_dir(root);
}
let output = command.output()
.map_err(|e| FossilError::CommandFailed(e.to_string()))?;
let stdout = String::from_utf8_lossy(&output.stdout).to_string();
let stderr = String::from_utf8_lossy(&output.stderr).to_string();
let _ = log_command(&cmdline, output.status.success(), &stdout, &stderr);
if output.status.success() {
Ok(stdout)
} else {
let lowered = stderr.to_lowercase();
if lowered.contains("not within an open checkout")
|| lowered.contains("not an open checkout")
|| lowered.contains("use 'fossil open'")
|| lowered.contains("repository filename")
|| lowered.contains("no such file or directory")
{
Err(FossilError::NotRepository)
} else {
Err(FossilError::CommandFailed(stderr))
}
}
}
}
fn build_add_args<'a>(paths: &'a [String]) -> Vec<&'a str> {
let mut args = vec!["add"];
for path in paths {
args.push(path.as_str());
}
args
}
fn build_commit_args<'a>(paths: &'a [String], message: &'a str) -> Vec<&'a str> {
let mut args = vec!["commit", "-m", message];
for path in paths {
args.push(path.as_str());
}
args
}
fn update_ignore_file(root: &Path, pattern: &str) -> std::io::Result<()> {
let dir = root.join(".fossil-settings");
let path = dir.join("ignore-glob");
fs::create_dir_all(&dir)?;
let mut contents = fs::read_to_string(&path).unwrap_or_default();
let pattern = pattern.trim();
if pattern.is_empty() {
return Ok(());
}
if !contents.lines().any(|line| line.trim() == pattern) {
if !contents.ends_with('\n') && !contents.is_empty() {
contents.push('\n');
}
contents.push_str(pattern);
contents.push('\n');
fs::write(path, contents)?;
}
Ok(())
}
fn log_command(cmd: &str, success: bool, stdout: &str, stderr: &str) -> std::io::Result<()> {
let mut file = OpenOptions::new().create(true).append(true).open("fossil-debug.log")?;
writeln!(file, "=== {} ===", cmd)?;
writeln!(file, "status: {}", if success { "ok" } else { "err" })?;
if !stdout.trim().is_empty() {
writeln!(file, "stdout:\n{}", stdout)?;
}
if !stderr.trim().is_empty() {
writeln!(file, "stderr:\n{}", stderr)?;
}
writeln!(file)?;
Ok(())
}
fn parse_status(out: &str) -> Vec<FileStatus> {
out.lines()
.filter_map(|line| {
line.strip_prefix("EDITED ")
.map(|path| FileStatus { path: path.trim().to_string(), status: "edited".to_string() })
.or_else(|| line.strip_prefix("ADDED ").map(|path| FileStatus { path: path.trim().to_string(), status: "added".to_string() }))
.or_else(|| line.strip_prefix("DELETED ").map(|path| FileStatus { path: path.trim().to_string(), status: "deleted".to_string() }))
.or_else(|| line.strip_prefix("MISSING ").map(|path| FileStatus { path: path.trim().to_string(), status: "missing".to_string() }))
.or_else(|| line.strip_prefix("CHECKED-OUT ").map(|path| FileStatus { path: path.trim().to_string(), status: "checked-out".to_string() }))
.or_else(|| line.strip_prefix("CONFLICT ").map(|path| FileStatus { path: path.trim().to_string(), status: "conflict".to_string() }))
.or_else(|| line.strip_prefix("MERGE-CONFLICT ").map(|path| FileStatus { path: path.trim().to_string(), status: "conflict".to_string() }))
})
.collect()
}
fn parse_extra(out: &str) -> Vec<FileStatus> {
out.lines()
.filter_map(|line| {
let path = line.trim();
(!path.is_empty()).then(|| FileStatus { path: path.to_string(), status: "extra".to_string() })
})
.collect()
}
fn parse_tracked(out: &str) -> Vec<FileStatus> {
out.lines()
.filter_map(|line| {
let path = line.trim();
(!path.is_empty()).then(|| FileStatus { path: path.to_string(), status: "checked-out".to_string() })
})
.collect()
}
fn merge_files(mut tracked: Vec<FileStatus>, status: Vec<FileStatus>, extras: Vec<FileStatus>) -> Vec<FileStatus> {
for file in status.into_iter().chain(extras.into_iter()) {
if let Some(existing) = tracked.iter_mut().find(|entry| entry.path == file.path) {
existing.status = file.status;
} else {
tracked.push(file);
}
}
tracked
}
fn parse_timeline(out: &str) -> Vec<TimelineEntry> {
out.lines()
.filter_map(|line| {
let parts: Vec<_> = line.splitn(4, '|').collect();
if parts.len() == 4 {
Some(TimelineEntry {
rid: parts[0].trim().to_string(),
user: parts[1].trim().to_string(),
date: parts[2].trim().to_string(),
message: parts[3].trim().to_string(),
})
} else {
None
}
})
.collect()
}
pub fn _dummy_result() -> Result<()> {
Ok(())
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn parses_status_and_extras_and_merges() {
let tracked = parse_tracked("src/lib.rs\nREADME.md\nold.txt\ntracked.txt\n");
let status = parse_status("EDITED src/lib.rs\nADDED README.md\nDELETED old.txt\nMISSING gone.txt\nCHECKED-OUT tracked.txt\nIGNORED nope\n");
let extras = parse_extra("tmp.log\n \nnotes.txt\n");
let merged = merge_files(tracked, status, extras);
assert_eq!(merged.len(), 7);
assert!(merged.iter().any(|f| f.path == "src/lib.rs" && f.status == "edited"));
assert!(merged.iter().any(|f| f.path == "README.md" && f.status == "added"));
assert!(merged.iter().any(|f| f.path == "old.txt" && f.status == "deleted"));
assert!(merged.iter().any(|f| f.path == "gone.txt" && f.status == "missing"));
assert!(merged.iter().any(|f| f.path == "tracked.txt" && f.status == "checked-out"));
assert!(merged.iter().any(|f| f.path == "tmp.log" && f.status == "extra"));
assert!(merged.iter().any(|f| f.path == "notes.txt" && f.status == "extra"));
}
#[test]
fn parses_timeline_format() {
let entries = parse_timeline("abc123|Alice|2026-06-04 10:00|Fix bug\nzzz999|Bob|2026-06-04 11:00|Refactor\n");
assert_eq!(entries.len(), 2);
assert_eq!(entries[0].rid, "abc123");
assert_eq!(entries[0].user, "Alice");
assert_eq!(entries[0].date, "2026-06-04 10:00");
assert_eq!(entries[0].message, "Fix bug");
}
#[test]
fn builds_commit_arguments_for_selected_paths() {
let paths = vec!["a.txt".to_string(), "b.txt".to_string()];
let args = build_commit_args(&paths, "hello");
assert_eq!(args, vec!["commit", "-m", "hello", "a.txt", "b.txt"]);
}
#[test]
fn builds_add_arguments_for_selected_paths() {
let paths = vec!["extra.txt".to_string()];
let args = build_add_args(&paths);
assert_eq!(args, vec!["add", "extra.txt"]);
}
#[test]
fn updates_ignore_file_contents() {
let dir = std::env::temp_dir().join(format!("lazyfossil-test-{}", std::process::id()));
let settings = dir.join(".fossil-settings");
std::fs::create_dir_all(&settings).unwrap();
let ignore = settings.join("ignore-glob");
std::fs::write(&ignore, "*.swp\n").unwrap();
let old = std::env::current_dir().unwrap();
std::env::set_current_dir(&dir).unwrap();
update_ignore_file("notes.txt").unwrap();
std::env::set_current_dir(old).unwrap();
let contents = std::fs::read_to_string(ignore).unwrap();
assert!(contents.contains("*.swp"));
assert!(contents.contains("notes.txt"));
}
}