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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
/// Implement ncurses-compatible database discovery
/// Does not support hashed database, only filesystem!
use std::{os, str};
use std::os::getenv;
use std::io::{file_reader, Reader};
use path = std::path::Path;
/// Return path to database entry for `term`
pub fn get_dbpath_for_term(term: &str) -> Option<~path> {
if term.len() == 0 {
return None;
}
let homedir = os::homedir();
let mut dirs_to_search = ~[];
let first_char = term.char_at(0);
// Find search directory
match getenv("TERMINFO") {
Some(dir) => dirs_to_search.push(path(dir)),
None => {
if homedir.is_some() {
dirs_to_search.push(homedir.unwrap().push(".terminfo")); // ncurses compatability
}
match getenv("TERMINFO_DIRS") {
Some(dirs) => for dirs.split_iter(':').advance |i| {
if i == "" {
dirs_to_search.push(path("/usr/share/terminfo"));
} else {
dirs_to_search.push(path(i.to_owned()));
}
},
// Found nothing, use the default paths
// /usr/share/terminfo is the de facto location, but it seems
// Ubuntu puts it in /lib/terminfo
None => {
dirs_to_search.push(path("/usr/share/terminfo"));
dirs_to_search.push(path("/lib/terminfo"));
}
}
}
};
// Look for the terminal in all of the search directories
for dirs_to_search.iter().advance |p| {
let newp = ~p.push_many(&[str::from_char(first_char), term.to_owned()]);
if os::path_exists(p) && os::path_exists(newp) {
return Some(newp);
}
// on some installations the dir is named after the hex of the char (e.g. OS X)
let newp = ~p.push_many(&[fmt!("%x", first_char as uint), term.to_owned()]);
if os::path_exists(p) && os::path_exists(newp) {
return Some(newp);
}
}
None
}
/// Return open file for `term`
pub fn open(term: &str) -> Result<@Reader, ~str> {
match get_dbpath_for_term(term) {
Some(x) => file_reader(x),
None => Err(fmt!("could not find terminfo entry for %s", term))
}
}
#[test]
#[ignore(reason = "buildbots don't have ncurses installed and I can't mock everything I need")]
fn test_get_dbpath_for_term() {
// woefully inadequate test coverage
// note: current tests won't work with non-standard terminfo hierarchies (e.g. OS X's)
use std::os::{setenv, unsetenv};
fn x(t: &str) -> ~str { get_dbpath_for_term(t).expect("no terminfo entry found").to_str() };
assert!(x("screen") == ~"/usr/share/terminfo/s/screen");
assert!(get_dbpath_for_term("") == None);
setenv("TERMINFO_DIRS", ":");
assert!(x("screen") == ~"/usr/share/terminfo/s/screen");
unsetenv("TERMINFO_DIRS");
}
#[test]
#[ignore(reason = "see test_get_dbpath_for_term")]
fn test_open() {
open("screen");
let t = open("nonexistent terminal that hopefully does not exist");
assert!(t.is_err());
}
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