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use {
crate::{
path_anchor::PathAnchor,
},
directories::UserDirs,
regex::{self, Captures},
std::{
collections::HashMap,
path::{Component, Path, PathBuf},
},
};
/// build a usable path from a user input which may be absolute
/// (if it starts with / or ~) or relative to the supplied base_dir.
/// (we might want to try detect windows drives in the future, too)
///
pub fn path_from<P: AsRef<Path>>(base_dir: P, anchor: PathAnchor, input: &str) -> PathBuf {
let tilde = regex!(r"^~(/|$)");
if input.starts_with('/') {
// if the input starts with a `/`, we use it as is
input.into()
} else if tilde.is_match(input) {
// if the input starts with `~` as first token, we replace
// this `~` with the user home directory
PathBuf::from(
&*tilde
.replace(input, |c: &Captures| {
if let Some(user_dirs) = UserDirs::new() {
format!("{}{}", user_dirs.home_dir().to_string_lossy(), &c[1],)
} else {
warn!("no user dirs found, no expansion of ~");
c[0].to_string()
}
})
)
} else {
// we put the input behind the source (the selected directory
// or its parent) and we normalize so that the user can type
// paths with `../`
let base_dir = match anchor {
PathAnchor::Parent => base_dir.as_ref()
.parent().unwrap_or_else(||base_dir.as_ref())
.to_path_buf(),
_ => closest_dir(base_dir.as_ref()),
};
normalize_path(base_dir.join(input))
}
}
pub fn path_str_from<P: AsRef<Path>>(base_dir: P, input: &str) -> String {
path_from(base_dir, PathAnchor::Unspecified, input).to_string_lossy().to_string()
}
/// return the closest enclosing directory
pub fn closest_dir(mut path: &Path) -> PathBuf {
loop {
if path.exists() && path.is_dir() {
return path.to_path_buf();
}
match path.parent() {
Some(parent) => path = parent,
None => {
debug!("no existing parent"); // unexpected
return path.to_path_buf();
}
}
}
}
/// replace a group in the execution string, using
/// data from the user input and from the selected line
pub fn do_exec_replacement(ec: &Captures<'_>, replacement_map: &HashMap<String, String>) -> String {
let name = ec.get(1).unwrap().as_str();
if let Some(repl) = replacement_map.get(name) {
if let Some(fmt) = ec.get(2) {
match fmt.as_str() {
"path-from-directory" => path_str_from(replacement_map.get("directory").unwrap(), repl),
"path-from-parent" => path_str_from(replacement_map.get("parent").unwrap(), repl),
_ => format!("invalid format: {:?}", fmt.as_str()),
}
} else {
repl.to_string()
}
} else {
format!("{{{}}}", name)
}
}
/// from a path, build a string usable in a shell command, wrapping
/// it in quotes if necessary (and then escaping internal quotes).
/// Don't do unnecessary transformation, so that the produced string
/// is prettier on screen.
pub fn escape_for_shell(path: &Path) -> String {
let path = path.to_string_lossy();
if regex!(r"^[\w/.-]*$").is_match(&path) {
path.to_string()
} else {
format!("'{}'", &path.replace('\'', r"'\''"))
}
}
/// Improve the path to try remove and solve .. token.
///
/// This assumes that `a/b/../c` is `a/c` which might be different from
/// what the OS would have chosen when b is a link. This is OK
/// for broot verb arguments but can't be generally used elsewhere
/// (a more general solution would probably query the FS and just
/// resolve b in case of links).
///
/// This function ensures a given path ending with '/' still
/// ends with '/' after normalization.
pub fn normalize_path<P: AsRef<Path>>(path: P) -> PathBuf {
let ends_with_slash = path.as_ref().to_str().map_or(false, |s| s.ends_with('/'));
let mut normalized = PathBuf::new();
for component in path.as_ref().components() {
match &component {
Component::ParentDir => {
if !normalized.pop() {
normalized.push(component);
}
}
_ => {
normalized.push(component);
}
}
}
if ends_with_slash {
normalized.push("");
}
normalized
}
#[cfg(test)]
mod path_normalize_tests {
use super::normalize_path;
fn check(before: &str, after: &str) {
println!("-----------------\nnormalizing {:?}", before);
assert_eq!(normalize_path(before.to_string()).to_string_lossy(), after);
}
#[test]
fn test_path_normalization() {
check("/abc/test/../thing.png", "/abc/thing.png");
check("/abc/def/../../thing.png", "/thing.png");
check("/home/dys/test", "/home/dys/test");
check("/home/dys", "/home/dys");
check("/home/dys/", "/home/dys/");
check("/home/dys/..", "/home");
check("/home/dys/../", "/home/");
check("/..", "/..");
check("../test", "../test");
check("/home/dys/../../../test", "/../test");
check("π/2", "π/2");
check(
"/home/dys/dev/broot/../../../canop/test",
"/home/canop/test",
);
}
}
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