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use std::{
default::Default,
fs, io,
path::{Path, PathBuf},
str::FromStr,
};
use clap::Clap;
use globset::{Error as GlobError, GlobBuilder, GlobSet, GlobSetBuilder};
use vfs::ReadOnlyVfs;
use crate::err::ConfigErr;
/// Lints and suggestions for the Nix programming language
#[derive(Clap, Debug)]
#[clap(version = "0.1.0", author = "Akshay <[email protected]>")]
pub struct Opts {
/// File or directory to run statix on
#[clap(default_value = ".")]
target: String,
// /// Path to statix config
// #[clap(short, long, default_value = ".statix.toml")]
// config: String,
/// Regex of file patterns to not lint
#[clap(short, long)]
ignore: Vec<String>,
/// Output format. Supported values: json, errfmt
#[clap(short = 'o', long)]
format: Option<OutFormat>,
#[clap(subcommand)]
pub subcmd: Option<SubCommand>,
}
#[derive(Clap, Debug)]
#[clap(version = "0.1.0", author = "Akshay <[email protected]>")]
pub enum SubCommand {
/// Find and fix issues raised by statix
Fix(Fix),
}
#[derive(Clap, Debug)]
pub struct Fix {
/// Do not write to files, display a diff instead
#[clap(short = 'd', long = "dry-run")]
diff_only: bool,
}
#[derive(Debug, Copy, Clone)]
pub enum OutFormat {
Json,
Errfmt,
StdErr,
}
impl Default for OutFormat {
fn default() -> Self {
OutFormat::StdErr
}
}
impl FromStr for OutFormat {
type Err = &'static str;
fn from_str(value: &str) -> Result<Self, Self::Err> {
match value.to_ascii_lowercase().as_str() {
"json" => Ok(Self::Json),
"errfmt" => Ok(Self::Errfmt),
"stderr" => Ok(Self::StdErr),
_ => Err("unknown output format, try: json, errfmt"),
}
}
}
#[derive(Debug)]
pub struct LintConfig {
pub files: Vec<PathBuf>,
pub format: OutFormat,
}
impl LintConfig {
pub fn from_opts(opts: Opts) -> Result<Self, ConfigErr> {
let ignores = build_ignore_set(&opts.ignore).map_err(|err| {
ConfigErr::InvalidGlob(err.glob().map(|i| i.to_owned()), err.kind().clone())
})?;
let files = walk_nix_files(&opts.target)?
.filter(|path| !ignores.is_match(path))
.collect();
Ok(Self {
files,
format: opts.format.unwrap_or_default(),
})
}
pub fn vfs(&self) -> Result<ReadOnlyVfs, ConfigErr> {
let mut vfs = ReadOnlyVfs::default();
for file in self.files.iter() {
let _id = vfs.alloc_file_id(&file);
let data = fs::read_to_string(&file).map_err(ConfigErr::InvalidPath)?;
vfs.set_file_contents(&file, data.as_bytes());
}
Ok(vfs)
}
}
pub struct FixConfig {
pub files: Vec<PathBuf>,
pub diff_only: bool,
}
impl FixConfig {
pub fn from_opts(opts: Opts) -> Result<Self, ConfigErr> {
let ignores = build_ignore_set(&opts.ignore).map_err(|err| {
ConfigErr::InvalidGlob(err.glob().map(|i| i.to_owned()), err.kind().clone())
})?;
let files = walk_nix_files(&opts.target)?
.filter(|path| !ignores.is_match(path))
.collect();
let diff_only = match opts.subcmd {
Some(SubCommand::Fix(f)) => f.diff_only,
_ => false,
};
Ok(Self { files, diff_only })
}
pub fn vfs(&self) -> Result<ReadOnlyVfs, ConfigErr> {
let mut vfs = ReadOnlyVfs::default();
for file in self.files.iter() {
let _id = vfs.alloc_file_id(&file);
let data = fs::read_to_string(&file).map_err(ConfigErr::InvalidPath)?;
vfs.set_file_contents(&file, data.as_bytes());
}
Ok(vfs)
}
}
mod dirs {
use std::{
fs,
io::{self, Error, ErrorKind},
path::{Path, PathBuf},
};
#[derive(Default, Debug)]
pub struct Walker {
dirs: Vec<PathBuf>,
files: Vec<PathBuf>,
}
impl Walker {
pub fn new<P: AsRef<Path>>(target: P) -> io::Result<Self> {
let target = target.as_ref().to_path_buf();
if !target.exists() {
Err(Error::new(
ErrorKind::NotFound,
format!("file not found: {}", target.display()),
))
} else if target.is_dir() {
Ok(Self {
dirs: vec![target],
..Default::default()
})
} else {
Ok(Self {
files: vec![target],
..Default::default()
})
}
}
}
impl Iterator for Walker {
type Item = PathBuf;
fn next(&mut self) -> Option<Self::Item> {
if let Some(dir) = self.dirs.pop() {
if dir.is_dir() {
for entry in fs::read_dir(dir).ok()? {
let entry = entry.ok()?;
let path = entry.path();
if path.is_dir() {
self.dirs.push(path);
} else if path.is_file() {
self.files.push(path);
}
}
}
}
self.files.pop()
}
}
}
fn build_ignore_set(ignores: &Vec<String>) -> Result<GlobSet, GlobError> {
let mut set = GlobSetBuilder::new();
for pattern in ignores {
let glob = GlobBuilder::new(&pattern).build()?;
set.add(glob);
}
set.build()
}
fn walk_nix_files<P: AsRef<Path>>(target: P) -> Result<impl Iterator<Item = PathBuf>, io::Error> {
let walker = dirs::Walker::new(target)?;
Ok(walker.filter(|path: &PathBuf| matches!(path.extension(), Some(e) if e == "nix")))
}
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