open_file/
lib.rs

1//! Opening file in editor
2//!
3//! ## Usage
4//! ```rust
5//! extern crate open_file;
6//!
7//! fn main() {
8//!     open_file::open(String::from("Cargo.toml"), Some(String::from("kate")));
9//! }
10//! ```
11use std::env;
12use std::process::Command;
13
14/// Function opens the file in the editor
15pub fn open(file: String, opts: Option<String>) {
16    let application = editor(opts);
17
18    Command::new(&application)
19        .arg(file)
20        .output()
21        .expect("failed to execute process");
22}
23
24/// Function returns the default editor depending on the operating system
25fn default_editor() -> String {
26    if env::consts::OS == "windows" {
27        String::from("notepad")
28    } else {
29        String::from("vi")
30    }
31}
32
33/// Function returns the editor
34fn editor(opts: Option<String>) -> String {
35    let visual = match env::var("VISUAL") {
36        Ok(env) => env,
37        Err(_) => String::new(),
38    };
39
40    let editor = match env::var("EDITOR") {
41        Ok(env) => env,
42        Err(_) => String::new(),
43    };
44
45    let default = default_editor();
46
47    if !opts.is_none() {
48        opts.unwrap()
49    } else if !visual.is_empty() {
50        visual
51    } else if !editor.is_empty() {
52        editor
53    } else {
54        default
55    }
56}
57
58#[cfg(test)]
59mod tests {
60    use super::*;
61
62    #[test]
63    #[cfg(target_family = "unix")]
64    fn test_default_unix() {
65        assert_eq!(default_editor(), String::from("vi"));
66    }
67
68    #[test]
69    #[cfg(target_family = "windows")]
70    fn test_default_windows() {
71        assert_eq!(default_editor(), String::from("notepad"));
72    }
73
74    #[test]
75    fn test_editor() {
76        assert_eq!(editor(Some(String::from("nano"))), String::from("nano"));
77    }
78
79    #[test]
80    fn test_editor_env() {
81        env::set_var("EDITOR", "nano");
82        assert_eq!(editor(None), String::from("nano"));
83    }
84}
open_file/lib.rs

open_file/
lib.rs
