use clap::{Arg, Command};
use console::style;
use eyre::{Context, ContextCompat};
use std::io::prelude::*;
use std::{env::current_dir, io::Read, path::PathBuf};
use tracing_subscriber::layer::SubscriberExt;
use tracing_subscriber::util::SubscriberInitExt;
pub fn main() -> eyre::Result<()> {
let matches = Command::new("gitignore")
.version("0.1")
.author("Kasper J. Hermansen <contact@kjuulh.io>")
.about("Easily ignore items and remove from git state")
.long_about("git ignore is a utility tool for easily adding patterns to your .gitignore file.
Easily add patterns using `git ignore <pattern>` this will by default also help you remove committed code violating these patterns
")
.propagate_version(true)
.arg(
Arg::new("pattern")
.help("the pattern you want to ignore")
.long_help("the pattern you want to ignore in the nearest .gitignore file")
.required(true),
).arg(
Arg::new("log-level").long("log-level").help("choose a log level and get more messages").long_help("Choose a log level and get more message, defaults to [fatal]"))
.get_matches();
let log_level = match matches.get_one::<String>("log-level").map(|f| f.as_str()) {
Some("off") => "off",
Some("info") => "info",
Some("debug") => "debug",
Some("warn") => "warn",
Some("error") => "error",
_ => "error",
};
tracing_subscriber::registry()
.with(tracing_subscriber::EnvFilter::new(format!(
"gitignore={}",
log_level
)))
.with(tracing_subscriber::fmt::layer())
.init();
let term = console::Term::stdout();
let pattern = matches
.get_one::<String>("pattern")
.context("missing [pattern]")?;
add_gitignore_pattern(term, pattern)
}
enum GitActions {
AddPattern { gitignore_path: PathBuf },
CreateIgnoreAndAddPattern { git_path: PathBuf },
}
fn add_gitignore_pattern(term: console::Term, pattern: &String) -> eyre::Result<()> {
println!("git ignore: Add pattern");
let curdir = current_dir().context(
"could not find current_dir, you may not have permission to access that directory",
)?;
let actions = match search_for_dotgitignore(&curdir)? {
GitSearchResult::GitIgnore(ignorepath) => match search_for_git_root(&curdir)? {
GitSearchResult::Git(_gitpath) => GitActions::AddPattern {
gitignore_path: ignorepath,
},
_ => return Err(eyre::anyhow!("could not find parent git directory")),
},
GitSearchResult::Git(gitpath) => {
GitActions::CreateIgnoreAndAddPattern { git_path: gitpath }
} };
match actions {
GitActions::AddPattern { gitignore_path } => {
println!("Found existing {}", style(".gitignore").green());
let mut gitignore_file = open_gitignore_file(&gitignore_path)?;
let mut gitignore_content = String::new();
gitignore_file
.read_to_string(&mut gitignore_content)
.context(format!(
"could not read file: {}",
gitignore_path.to_string_lossy()
))?;
if gitignore_content.contains(pattern) {
println!(
".gitignore already contains pattern, {}",
style("skipping...").blue()
);
return Ok(());
}
println!("adding pattern to file");
writeln!(gitignore_file, "{}", pattern).context("could not write contents to file")?;
gitignore_file
.sync_all()
.context("failed to write data to disk")?;
}
GitActions::CreateIgnoreAndAddPattern { git_path } => {
println!(
"could not find {} file, creating one in the root of the git repository",
style(".gitignore").yellow()
);
let mut gitignore_file = create_gitignore_file(git_path)?;
println!("adding pattern to file");
writeln!(gitignore_file, "{}", pattern).context("could not write contents to file")?;
gitignore_file
.sync_all()
.context("failed to write data to disk")?;
}
}
let output = std::process::Command::new("git")
.arg("rm")
.arg("-r")
.arg("--cached")
.arg("-f")
.arg("--ignore-unmatch")
.arg(pattern)
.output()
.context("could not process git remove from index command")?;
String::from_utf8(output.stdout)?
.lines()
.chain(String::from_utf8(output.stderr)?.lines())
.map(|l| {
if l.contains("rm") {
if let Some((_, pruned_first)) = l.split_once("'") {
if let Some((content, _)) = pruned_first.rsplit_once("'") {
return content;
}
}
}
l
})
.for_each(|l| println!("removed from git history: {}", style(l).yellow()));
if !output.status.success() {
return Err(eyre::anyhow!("failed to run git index command"));
}
term.write_line("git successfully removed files")?;
Ok(())
}
fn create_gitignore_file(gitroot: PathBuf) -> eyre::Result<std::fs::File> {
let mut ignore_path = gitroot.clone();
if !ignore_path.pop() {
return Err(eyre::anyhow!("could not open parent dir"));
}
ignore_path.push(".gitignore");
let file = std::fs::File::create(ignore_path.clone()).context(format!(
"could not create file at path: {}",
ignore_path.to_string_lossy()
))?;
Ok(file)
}
fn open_gitignore_file(gitignore: &PathBuf) -> eyre::Result<std::fs::File> {
let file = std::fs::OpenOptions::new()
.read(true)
.write(true)
.open(gitignore)
.context(format!(
"could not create file at path: {}",
gitignore.to_string_lossy()
))?;
Ok(file)
}
enum GitSearchResult {
GitIgnore(PathBuf),
Git(PathBuf),
}
fn search_for_git_root(path: &PathBuf) -> eyre::Result<GitSearchResult> {
if !path.is_dir() {
return Err(eyre::anyhow!(
"path is not a dir: {}",
path.to_string_lossy()
));
}
let direntries = std::fs::read_dir(path)
.context(format!("could not open dir: {}", path.to_string_lossy()))?;
for direntry in direntries {
let entry = direntry.context("could not access file")?;
let file_name = entry.file_name().to_os_string();
if file_name.to_str().context("could not convert to str")? == ".git" {
return Ok(GitSearchResult::Git(entry.path()));
}
}
let mut upwards_par = path.clone();
if !upwards_par.pop() {
return Err(eyre::anyhow!(
"no parent exists, cannot check further, you may not be in a git repository"
));
}
search_for_git_root(&upwards_par)
}
fn search_for_dotgitignore(path: &PathBuf) -> eyre::Result<GitSearchResult> {
if !path.is_dir() {
return Err(eyre::anyhow!(
"path is not a dir: {}",
path.to_string_lossy()
));
}
let direntries = std::fs::read_dir(path)
.context(format!("could not open dir: {}", path.to_string_lossy()))?;
for direntry in direntries {
let entry = direntry.context("could not access file")?;
let file_name = entry.file_name().to_os_string();
if file_name.to_str().context("could not convert to str")? == ".gitignore" {
return Ok(GitSearchResult::GitIgnore(entry.path()));
}
}
let direntries = std::fs::read_dir(path)
.context(format!("could not open dir: {}", path.to_string_lossy()))?;
for direntry in direntries {
let entry = direntry.context("could not access file")?;
let file_name = entry.file_name().to_os_string();
if file_name.to_str().context("could not convert to str")? == ".git" {
return Ok(GitSearchResult::Git(entry.path()));
}
}
let mut upwards_par = path.clone();
if !upwards_par.pop() {
return Err(eyre::anyhow!(
"no parent exists, cannot check further, you may not be in a git repository"
));
}
search_for_dotgitignore(&upwards_par)
}