fd/src/app.rs

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Rust
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use std::collections::HashMap;
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use clap::{App, AppSettings, Arg};
struct Help {
short: &'static str,
long: &'static str,
}
macro_rules! doc {
($map:expr, $name:expr, $short:expr) => {
doc!($map, $name, $short, $short)
};
($map:expr, $name:expr, $short:expr, $long:expr) => {
$map.insert($name, Help {
short: $short,
long: concat!($long, "\n ")
});
};
}
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pub fn build_app() -> App<'static, 'static> {
let helps = usage();
let arg = |name| {
Arg::with_name(name).help(helps[name].short).long_help(
helps[name].long,
)
};
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App::new("fd")
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.version(crate_version!())
.usage("fd [FLAGS/OPTIONS] [<pattern>] [<path>]")
.setting(AppSettings::ColoredHelp)
.setting(AppSettings::DeriveDisplayOrder)
.arg(arg("hidden").long("hidden").short("H"))
.arg(arg("no-ignore").long("no-ignore").short("I"))
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.arg(
arg("rg-alias-hidden-ignore")
.short("u")
.multiple(true)
.hidden(true),
)
.arg(
arg("case-sensitive")
.long("case-sensitive")
.short("s")
.overrides_with("ignore-case"),
)
.arg(
arg("ignore-case")
.long("ignore-case")
.short("i")
.overrides_with("case-sensitive"),
)
.arg(arg("absolute-path").long("absolute-path").short("a"))
.arg(arg("follow").long("follow").short("L").alias("dereference"))
.arg(arg("full-path").long("full-path").short("p"))
.arg(arg("null_separator").long("print0").short("0"))
.arg(arg("depth").long("max-depth").short("d").takes_value(true))
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.arg(
arg("file-type")
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.long("type")
.short("t")
.takes_value(true)
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.value_name("filetype")
.possible_values(&["f", "file", "d", "directory", "l", "symlink"])
.hide_possible_values(true),
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)
.arg(
arg("extension")
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.long("extension")
.short("e")
.takes_value(true)
.value_name("ext"),
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)
.arg(
arg("color")
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.long("color")
.short("c")
.takes_value(true)
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.value_name("when")
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.possible_values(&["never", "auto", "always"])
.hide_possible_values(true),
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)
.arg(
arg("threads")
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.long("threads")
.short("j")
.takes_value(true)
.value_name("num"),
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)
.arg(
arg("max-buffer-time")
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.long("max-buffer-time")
.takes_value(true)
.hidden(true),
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)
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.arg(arg("exec").long("exec").short("x").takes_value(true))
.arg(arg("pattern"))
.arg(arg("path"))
}
#[cfg_attr(rustfmt, rustfmt_skip)]
fn usage() -> HashMap<&'static str, Help> {
let mut h = HashMap::new();
doc!(h, "hidden"
, "Search hidden files and directories"
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, "Include hidden directories and files in the search results (default: hidden files \
and directories are skipped).");
doc!(h, "no-ignore"
, "Do not respect .(git)ignore files"
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, "Show search results from files and directories that would otherwise be ignored by \
'.*ignore' files.");
doc!(h, "case-sensitive"
, "Case-sensitive search (default: smart case)"
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, "Perform a case-sensitive search. By default, fd uses case-insensitive searches, \
unless the pattern contains an uppercase character (smart case).");
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doc!(h, "ignore-case"
, "Case-insensitive search (default: smart case)"
, "Perform a case-insensitive search. By default, fd uses case-insensitive searches, \
unless the pattern contains an uppercase character (smart case).");
doc!(h, "absolute-path"
, "Show absolute instead of relative paths"
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, "Shows the full path starting from the root as opposed to relative paths.");
doc!(h, "follow"
, "Follow symbolic links"
, "By default, fd does not descent into symlinked directories. Using this flag, symbolic \
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links are also traversed.");
doc!(h, "full-path"
, "Search full path (default: file-/dirname only)"
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, "By default, the search pattern is only matched against the filename (or directory \
name). Using this flag, the pattern is matched against the full path.");
doc!(h, "null_separator"
, "Separate results by the null character"
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, "Separate search results by the null character (instead of newlines). Useful for \
piping results to 'xargs'.");
doc!(h, "depth"
, "Set maximum search depth (default: none)"
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, "Limit the directory traversal to a given depth. By default, there is no limit \
on the search depth.");
doc!(h, "file-type"
, "Filter by type: f(ile), d(irectory), (sym)l(ink)"
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, "Filter the search by type:\n \
'f' or 'file': regular files\n \
'd' or 'directory': directories\n \
'l' or 'symlink': symbolic links");
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doc!(h, "exec"
, "Execute each discovered path using the argument that follows as the command expression."
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, "Execute each discovered path using the argument that follows as the command \
expression.\n \
The following are valid tokens that can be used within the expression for generating \
commands:\n \
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'{}': places the input in the location of this token\n \
'{.}': removes the extension from the input\n \
'{/}': places the basename of the input\n \
'{//}': places the parent of the input\n \
'{/.}': places the basename of the input, without the extension\n");
doc!(h, "extension"
, "Filter by file extension"
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, "(Additionally) filter search results by their file extension.");
doc!(h, "color"
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, "When to use colors: never, *auto*, always"
, "Declare when to use color for the pattern match output:\n \
'auto': show colors if the output goes to an interactive console (default)\n \
'never': do not use colorized output\n \
'always': always use colorized output");
doc!(h, "threads"
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, "Set number of threads to use for searching & executing"
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, "Set number of threads to use for searching & executing (default: number of available \
CPU cores)");
doc!(h, "max-buffer-time"
, "the time (in ms) to buffer, before streaming to the console"
, "Amount of time in milliseconds to buffer, before streaming the search results to\
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the console.");
doc!(h, "pattern"
, "the search pattern, a regular expression (optional)");
doc!(h, "path"
, "the root directory for the filesystem search (optional)"
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, "The directory where the filesystem search is rooted (optional). \
If omitted, search the current working directory.");
doc!(h, "rg-alias-hidden-ignore"
, "Alias for no-ignore and/or hidden"
, "Alias for no-ignore ('u') and no-ignore and hidden ('uu')");
h
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}