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//! ncurses-compatible database discovery.
//!
//! Does not support hashed database, only filesystem!
use std::env;
use std::fs;
use std::path::PathBuf;
#[cfg(test)]
mod tests;
/// Return path to database entry for `term`
#[allow(deprecated)]
pub(crate) fn get_dbpath_for_term(term: &str) -> Option<PathBuf> {
let mut dirs_to_search = Vec::new();
let first_char = term.chars().next()?;
// Find search directory
if let Some(dir) = env::var_os("TERMINFO") {
dirs_to_search.push(PathBuf::from(dir));
}
if let Ok(dirs) = env::var("TERMINFO_DIRS") {
for i in dirs.split(':') {
if i == "" {
dirs_to_search.push(PathBuf::from("/usr/share/terminfo"));
} else {
dirs_to_search.push(PathBuf::from(i));
}
}
} else {
// Found nothing in TERMINFO_DIRS, use the default paths:
// According to /etc/terminfo/README, after looking at
// ~/.terminfo, ncurses will search /etc/terminfo, then
// /lib/terminfo, and eventually /usr/share/terminfo.
// On Haiku the database can be found at /boot/system/data/terminfo
if let Some(mut homedir) = env::home_dir() {
homedir.push(".terminfo");
dirs_to_search.push(homedir)
}
dirs_to_search.push(PathBuf::from("/etc/terminfo"));
dirs_to_search.push(PathBuf::from("/lib/terminfo"));
dirs_to_search.push(PathBuf::from("/usr/share/terminfo"));
dirs_to_search.push(PathBuf::from("/boot/system/data/terminfo"));
}
// Look for the terminal in all of the search directories
for mut p in dirs_to_search {
if fs::metadata(&p).is_ok() {
p.push(&first_char.to_string());
p.push(&term);
if fs::metadata(&p).is_ok() {
return Some(p);
}
p.pop();
p.pop();
// on some installations the dir is named after the hex of the char
// (e.g., macOS)
p.push(&format!("{:x}", first_char as usize));
p.push(term);
if fs::metadata(&p).is_ok() {
return Some(p);
}
}
}
None
}
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