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use std::{default::Default, fmt, fs, path::PathBuf, str::FromStr};
use crate::{dirs, err::ConfigErr};
use clap::Clap;
use vfs::ReadOnlyVfs;
#[derive(Clap, Debug)]
#[clap(version, author, about)]
pub struct Opts {
#[clap(subcommand)]
pub cmd: SubCommand,
}
#[derive(Clap, Debug)]
pub enum SubCommand {
/// Lints and suggestions for the nix programming language
Check(Check),
/// Find and fix issues raised by statix-check
Fix(Fix),
/// Fix exactly one issue at provided position
Single(Single),
/// Print detailed explanation for a lint warning
Explain(Explain),
}
#[derive(Clap, Debug)]
pub struct Check {
/// File or directory to run check on
#[clap(default_value = ".", parse(from_os_str))]
target: PathBuf,
/// Globs of file patterns to skip
#[clap(short, long)]
ignore: Vec<String>,
/// Don't respect .gitignore files
#[clap(short, long)]
unrestricted: bool,
/// Output format.
/// Supported values: stderr, errfmt, json (on feature flag only)
#[clap(short = 'o', long, default_value_t, parse(try_from_str))]
pub format: OutFormat,
}
impl Check {
pub fn vfs(&self) -> Result<ReadOnlyVfs, ConfigErr> {
let ignore = dirs::build_ignore_set(&self.ignore, &self.target, self.unrestricted)?;
let files = dirs::walk_nix_files(ignore, &self.target)?;
vfs(files.collect::<Vec<_>>())
}
}
#[derive(Clap, Debug)]
pub struct Fix {
/// File or directory to run fix on
#[clap(default_value = ".", parse(from_os_str))]
target: PathBuf,
/// Globs of file patterns to skip
#[clap(short, long)]
ignore: Vec<String>,
/// Don't respect .gitignore files
#[clap(short, long)]
unrestricted: bool,
/// Do not fix files in place, display a diff instead
#[clap(short, long = "dry-run")]
pub diff_only: bool,
}
impl Fix {
pub fn vfs(&self) -> Result<ReadOnlyVfs, ConfigErr> {
let ignore = dirs::build_ignore_set(&self.ignore, &self.target, self.unrestricted)?;
let files = dirs::walk_nix_files(ignore, &self.target)?;
vfs(files.collect::<Vec<_>>())
}
}
#[derive(Clap, Debug)]
pub struct Single {
/// File to run single-fix on
#[clap(parse(from_os_str))]
pub target: Option<PathBuf>,
/// Position to attempt a fix at
#[clap(short, long, parse(try_from_str = parse_line_col))]
pub position: (usize, usize),
/// Do not fix files in place, display a diff instead
#[clap(short, long = "dry-run")]
pub diff_only: bool,
}
#[derive(Clap, Debug)]
pub struct Explain {
/// Warning code to explain
#[clap(parse(try_from_str = parse_warning_code))]
pub target: u32,
}
fn parse_line_col(src: &str) -> Result<(usize, usize), ConfigErr> {
let parts = src.split(',');
match parts.collect::<Vec<_>>().as_slice() {
[line, col] => {
let l = line
.parse::<usize>()
.map_err(|_| ConfigErr::InvalidPosition(src.to_owned()))?;
let c = col
.parse::<usize>()
.map_err(|_| ConfigErr::InvalidPosition(src.to_owned()))?;
Ok((l, c))
}
_ => Err(ConfigErr::InvalidPosition(src.to_owned())),
}
}
fn parse_warning_code(src: &str) -> Result<u32, ConfigErr> {
let mut char_stream = src.chars();
let severity = char_stream
.next()
.ok_or_else(|| ConfigErr::InvalidWarningCode(src.to_owned()))?
.to_ascii_lowercase();
match severity {
'w' => char_stream
.collect::<String>()
.parse::<u32>()
.map_err(|_| ConfigErr::InvalidWarningCode(src.to_owned())),
_ => Ok(0),
}
}
fn vfs(files: Vec<PathBuf>) -> Result<ReadOnlyVfs, ConfigErr> {
let mut vfs = ReadOnlyVfs::default();
for file in files.iter() {
if let Ok(data) = fs::read_to_string(&file) {
let _id = vfs.alloc_file_id(&file);
vfs.set_file_contents(&file, data.as_bytes());
} else {
println!("{} contains non-utf8 content", file.display());
};
}
Ok(vfs)
}
#[derive(Debug, Copy, Clone)]
pub enum OutFormat {
#[cfg(feature = "json")]
Json,
Errfmt,
StdErr,
}
impl Default for OutFormat {
fn default() -> Self {
OutFormat::StdErr
}
}
impl fmt::Display for OutFormat {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(
f,
"{}",
match self {
#[cfg(feature = "json")]
Self::Json => "json",
Self::Errfmt => "errfmt",
Self::StdErr => "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() {
#[cfg(feature = "json")]
"json" => Ok(Self::Json),
#[cfg(not(feature = "json"))]
"json" => Err("statix was not compiled with the `json` feature flag"),
"errfmt" => Ok(Self::Errfmt),
"stderr" => Ok(Self::StdErr),
_ => Err("unknown output format, try: json, errfmt"),
}
}
}
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