116 lines
4.0 KiB
Rust
116 lines
4.0 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! ncurses-compatible database discovery
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//!
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//! Does not support hashed database, only filesystem!
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use std::io::File;
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use std::os::getenv;
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use std::{os, str};
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/// Return path to database entry for `term`
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pub fn get_dbpath_for_term(term: &str) -> Option<~Path> {
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if term.len() == 0 {
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return None;
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}
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let homedir = os::homedir();
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let mut dirs_to_search = Vec::new();
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let first_char = term.char_at(0);
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// Find search directory
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match getenv("TERMINFO") {
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Some(dir) => dirs_to_search.push(Path::new(dir)),
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None => {
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if homedir.is_some() {
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// ncurses compatability;
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dirs_to_search.push(homedir.unwrap().join(".terminfo"))
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}
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match getenv("TERMINFO_DIRS") {
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Some(dirs) => for i in dirs.split(':') {
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if i == "" {
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dirs_to_search.push(Path::new("/usr/share/terminfo"));
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} else {
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dirs_to_search.push(Path::new(i.to_owned()));
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}
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},
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// Found nothing in TERMINFO_DIRS, use the default paths:
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// According to /etc/terminfo/README, after looking at
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// ~/.terminfo, ncurses will search /etc/terminfo, then
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// /lib/terminfo, and eventually /usr/share/terminfo.
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None => {
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dirs_to_search.push(Path::new("/etc/terminfo"));
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dirs_to_search.push(Path::new("/lib/terminfo"));
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dirs_to_search.push(Path::new("/usr/share/terminfo"));
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}
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}
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}
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};
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// Look for the terminal in all of the search directories
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for p in dirs_to_search.iter() {
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if p.exists() {
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let f = str::from_char(first_char);
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let newp = p.join_many([f.as_slice(), term]);
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if newp.exists() {
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return Some(box newp);
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}
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// on some installations the dir is named after the hex of the char (e.g. OS X)
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let f = format!("{:x}", first_char as uint);
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let newp = p.join_many([f.as_slice(), term]);
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if newp.exists() {
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return Some(box newp);
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}
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}
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}
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None
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}
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/// Return open file for `term`
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pub fn open(term: &str) -> Result<File, ~str> {
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match get_dbpath_for_term(term) {
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Some(x) => {
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match File::open(x) {
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Ok(file) => Ok(file),
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Err(e) => Err(format!("error opening file: {}", e)),
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}
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}
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None => Err(format!("could not find terminfo entry for {}", term))
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}
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}
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#[test]
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#[ignore(reason = "buildbots don't have ncurses installed and I can't mock everything I need")]
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fn test_get_dbpath_for_term() {
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// woefully inadequate test coverage
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// note: current tests won't work with non-standard terminfo hierarchies (e.g. OS X's)
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use std::os::{setenv, unsetenv};
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// FIXME (#9639): This needs to handle non-utf8 paths
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fn x(t: &str) -> ~str {
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let p = get_dbpath_for_term(t).expect("no terminfo entry found");
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p.as_str().unwrap().to_owned()
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};
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assert!(x("screen") == "/usr/share/terminfo/s/screen".to_owned());
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assert!(get_dbpath_for_term("") == None);
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setenv("TERMINFO_DIRS", ":");
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assert!(x("screen") == "/usr/share/terminfo/s/screen".to_owned());
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unsetenv("TERMINFO_DIRS");
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}
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#[test]
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#[ignore(reason = "see test_get_dbpath_for_term")]
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fn test_open() {
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open("screen").unwrap();
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let t = open("nonexistent terminal that hopefully does not exist");
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assert!(t.is_err());
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}
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