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https://github.com/sharkdp/fd.git
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302 lines
10 KiB
Rust
302 lines
10 KiB
Rust
extern crate ansi_term;
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extern crate getopts;
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extern crate atty;
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extern crate regex;
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extern crate ignore;
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pub mod lscolors;
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pub mod fshelper;
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use std::env;
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use std::error::Error;
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use std::ffi::OsStr;
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use std::fs;
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use std::io::Write;
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#[cfg(target_family = "unix")]
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use std::os::unix::fs::PermissionsExt;
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use std::path::{Path, Component};
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use std::process;
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use getopts::Options;
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use atty::Stream;
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use regex::{Regex, RegexBuilder};
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use ignore::WalkBuilder;
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use lscolors::LsColors;
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/// Defines how to display search result paths.
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#[derive(PartialEq)]
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enum PathDisplay {
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/// As an absolute path
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Absolute,
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/// As a relative path
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Relative
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}
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/// Configuration options for *fd*.
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struct FdOptions {
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/// Determines whether the regex search is case-sensitive or case-insensitive.
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case_sensitive: bool,
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/// Whether to search within the full file path or just the base name (filename or directory
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/// name).
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search_full_path: bool,
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/// Whether to ignore hidden files and directories (or not).
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ignore_hidden: bool,
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/// Whether to respect VCS ignore files (`.gitignore`, `.ignore`, ..) or not.
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read_ignore: bool,
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/// Whether to follow symlinks or not.
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follow_links: bool,
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/// The maximum search depth, or `None` if no maximum search depth should be set.
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///
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/// A depth of `1` includes all files under the current directory, a depth of `2` also includes
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/// all files under subdirectories of the current directory, etc.
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max_depth: Option<usize>,
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/// Display results as relative or absolute path.
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path_display: PathDisplay,
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/// `None` if the output should not be colorized. Otherwise, a `LsColors` instance that defines
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/// how to style different filetypes.
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ls_colors: Option<LsColors>
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}
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/// Root directory
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static ROOT_DIR : &'static str = "/";
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/// Print a search result to the console.
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fn print_entry(base: &Path, entry: &Path, config: &FdOptions) {
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let path_full = base.join(entry);
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let path_str = match entry.to_str() {
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Some(p) => p,
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None => return
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};
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#[cfg(target_family = "unix")]
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let is_executable = |p: &std::path::PathBuf| {
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p.metadata()
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.ok()
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.map(|f| f.permissions().mode() & 0o111 != 0)
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.unwrap_or(false)
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};
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#[cfg(not(target_family = "unix"))]
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let is_executable = |p: &std::path::PathBuf| {false};
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if let Some(ref ls_colors) = config.ls_colors {
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let default_style = ansi_term::Style::default();
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let mut component_path = base.to_path_buf();
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if config.path_display == PathDisplay::Absolute {
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print!("{}", ls_colors.directory.paint(ROOT_DIR));
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}
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// Traverse the path and colorize each component
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for component in entry.components() {
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let comp_str = match component {
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Component::Normal(p) => p.to_str().unwrap(),
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Component::ParentDir => "..",
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_ => error("Unexpected path component")
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};
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component_path.push(Path::new(comp_str));
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let style =
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if component_path.symlink_metadata()
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.map(|md| md.file_type().is_symlink())
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.unwrap_or(false) {
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&ls_colors.symlink
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} else if component_path.is_dir() {
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&ls_colors.directory
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} else if is_executable(&component_path) {
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&ls_colors.executable
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} else {
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// Look up file name
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let o_style =
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component_path.file_name()
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.and_then(|n| n.to_str())
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.and_then(|n| ls_colors.filenames.get(n));
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match o_style {
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Some(s) => s,
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None =>
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// Look up file extension
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component_path.extension()
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.and_then(|e| e.to_str())
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.and_then(|e| ls_colors.extensions.get(e))
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.unwrap_or(&default_style)
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}
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};
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print!("{}", style.paint(comp_str));
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if component_path.is_dir() && component_path != path_full {
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let sep = std::path::MAIN_SEPARATOR.to_string();
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print!("{}", style.paint(sep));
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}
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}
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println!();
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} else {
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// Uncolorized output
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let prefix = if config.path_display == PathDisplay::Absolute { ROOT_DIR } else { "" };
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let r = writeln!(&mut std::io::stdout(), "{}{}", prefix, path_str);
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if r.is_err() {
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// Probably a broken pipe. Exit gracefully.
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process::exit(0);
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}
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}
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}
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/// Recursively scan the given search path and search for files / pathnames matching the pattern.
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fn scan(root: &Path, pattern: &Regex, base: &Path, config: &FdOptions) {
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let walker = WalkBuilder::new(root)
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.hidden(config.ignore_hidden)
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.ignore(config.read_ignore)
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.git_ignore(config.read_ignore)
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.parents(config.read_ignore)
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.git_global(config.read_ignore)
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.git_exclude(config.read_ignore)
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.follow_links(config.follow_links)
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.max_depth(config.max_depth)
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.build()
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.into_iter()
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.filter_map(|e| e.ok())
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.filter(|e| e.path() != root);
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for entry in walker {
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let path_rel_buf = match fshelper::path_relative_from(entry.path(), base) {
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Some(p) => p,
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None => error("Could not get relative path for directory entry.")
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};
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let path_rel = path_rel_buf.as_path();
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let search_str =
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if config.search_full_path {
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path_rel.to_str()
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} else {
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path_rel.file_name()
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.and_then(OsStr::to_str)
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};
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search_str.and_then(|s| pattern.find(s))
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.map(|_| print_entry(base, path_rel, config));
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}
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}
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/// Print error message to stderr and exit with status `1`.
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fn error(message: &str) -> ! {
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writeln!(&mut std::io::stderr(), "{}", message)
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.expect("Failed writing to stderr");
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process::exit(1);
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}
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fn main() {
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let args: Vec<String> = env::args().collect();
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let mut opts = Options::new();
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opts.optflag("h", "help",
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"print this help message");
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opts.optflag("s", "sensitive",
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"case-sensitive search (default: smart case)");
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opts.optflag("p", "full-path",
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"search full path (default: file-/dirname only)");
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opts.optflag("H", "hidden",
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"search hidden files/directories");
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opts.optflag("I", "no-ignore",
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"do not respect .(git)ignore files");
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opts.optflag("f", "follow",
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"follow symlinks");
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opts.optflag("n", "no-color",
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"do not colorize output");
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opts.optopt("d", "max-depth",
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"maximum search depth (default: none)", "D");
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opts.optflag("a", "absolute",
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"show absolute instead of relative paths");
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let matches = match opts.parse(&args[1..]) {
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Ok(m) => m,
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Err(e) => error(e.description())
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};
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if matches.opt_present("h") {
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let brief = "Usage: fd [options] [PATTERN] [PATH]";
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print!("{}", opts.usage(brief));
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process::exit(1);
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}
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// Get the search pattern
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let empty_pattern = String::new();
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let pattern = matches.free.get(0).unwrap_or(&empty_pattern);
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// Get the current working directory
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let current_dir_buf = match env::current_dir() {
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Ok(cd) => cd,
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Err(_) => error("Could not get current directory!")
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};
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let current_dir = current_dir_buf.as_path();
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// Get the root directory for the search
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let root_dir_buf = matches.free.get(1)
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.and_then(|r| fs::canonicalize(r).ok())
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.unwrap_or_else(|| current_dir_buf.clone());
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let root_dir = root_dir_buf.as_path();
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// The search will be case-sensitive if the command line flag is set or
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// if the pattern has an uppercase character (smart case).
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let case_sensitive = matches.opt_present("sensitive") ||
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pattern.chars().any(char::is_uppercase);
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let colored_output = !matches.opt_present("no-color") &&
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atty::is(Stream::Stdout);
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let ls_colors =
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if colored_output {
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Some(
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env::var("LS_COLORS")
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.ok()
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.map(|val| LsColors::from_string(&val))
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.unwrap_or_default()
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)
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} else {
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None
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};
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let config = FdOptions {
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case_sensitive: case_sensitive,
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search_full_path: matches.opt_present("full-path"),
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ignore_hidden: !matches.opt_present("hidden"),
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read_ignore: !matches.opt_present("no-ignore"),
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follow_links: matches.opt_present("follow"),
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max_depth: matches.opt_str("max-depth")
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.and_then(|ds| usize::from_str_radix(&ds, 10).ok()),
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path_display: if matches.opt_present("absolute") {
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PathDisplay::Absolute
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} else {
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PathDisplay::Relative
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},
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ls_colors: ls_colors
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};
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let root = Path::new(ROOT_DIR);
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let base = match config.path_display {
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PathDisplay::Relative => current_dir,
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PathDisplay::Absolute => root
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};
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match RegexBuilder::new(pattern)
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.case_insensitive(!config.case_sensitive)
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.build() {
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Ok(re) => scan(root_dir, &re, base, &config),
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Err(err) => error(err.description())
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}
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}
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