1 files changed, 93 insertions, 0 deletions
diff --git a/vendor/term/src/terminfo/searcher.rs b/vendor/term/src/terminfo/searcher.rs
new file mode 100644
index 000000000..fca3061f4
--- /dev/null
+++ b/vendor/term/src/terminfo/searcher.rs
@@ -0,0 +1,93 @@
+// Copyright 2019 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.
+
+//! ncurses-compatible database discovery
+//!
+//! Does not support hashed database, only filesystem!
+
+use std::env;
+use std::fs;
+use std::path::PathBuf;
+
+use dirs_next as dirs;
+
+/// Return path to database entry for `term`
+pub fn get_dbpath_for_term(term: &str) -> Option<PathBuf> {
+    let mut dirs_to_search = Vec::new();
+    let first_char = match term.chars().next() {
+        Some(c) => c,
+        None => return None,
+    };
+
+    // Find search directory
+    // The terminfo manual says:
+    //
+    // > If  the  environment  variable  TERMINFO is set, it is interpreted
+    // > as the pathname of a directory containing the compiled description
+    // > you are working on.  Only that directory is searched.
+    //
+    // However, the ncurses manual says:
+    //
+    // > If the environment variable TERMINFO is defined, any program using
+    // > curses checks for a local terminal definition  before  checking in
+    // > the standard place.
+    //
+    // Given that ncurses is the defacto standard, we follow the ncurses manual.
+    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) = dirs::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. OS X)
+            p.push(&format!("{:x}", first_char as usize));
+            p.push(term);
+            if fs::metadata(&p).is_ok() {
+                return Some(p);
+            }
+        }
+    }
+    None
+}