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1use std::sync::OnceLock;
2
3static NO_COLOR: OnceLock<bool> = OnceLock::new();
4
5/// Initialize the color configuration based on CLI flag and environment.
6/// Should be called once at startup.
7pub fn init(cli_no_color: bool) {
8 let no_color = cli_no_color || should_disable_color_from_env();
9 NO_COLOR.set(no_color).ok();
10}
11
12/// Returns true if colors should be disabled.
13pub fn no_color() -> bool {
14 *NO_COLOR.get().unwrap_or(&false)
15}
16
17/// Returns true if colors are enabled.
18pub fn color_enabled() -> bool {
19 !no_color()
20}
21
22/// Check environment variables to determine if color should be disabled.
23fn should_disable_color_from_env() -> bool {
24 // NO_COLOR standard: https://no-color.org/
25 // If NO_COLOR exists (with any value), disable color
26 if std::env::var("NO_COLOR").is_ok() {
27 return true;
28 }
29
30 // Generic CI detection
31 if std::env::var("CI").is_ok_and(|v| v == "true") {
32 return true;
33 }
34
35 // GitHub actions
36 if std::env::var("GITHUB_ACTIONS").is_ok_and(|v| v == "true") {
37 return true;
38 }
39
40 // GitLab CI
41 if std::env::var("GITLAB_CI").is_ok() {
42 return true;
43 }
44
45 // Travis CI
46 if std::env::var("TRAVIS").is_ok_and(|v| v == "true") {
47 return true;
48 }
49
50 // Jenkins
51 if std::env::var("JENKINS_URL").is_ok() {
52 return true;
53 }
54
55 // Check if output is not a TTY (piped)
56 // This is a common convention for disabling colors
57 if std::env::var("TERM").is_ok_and(|v| v == "dumb") {
58 return true;
59 }
60
61 false
62}