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Merge pull request #40 from auguwu/main
Improve TypeScript typings and colour detection
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| const isNode = typeof process !== 'undefined'; | ||
| const truthy = new Set(['yes', 'true', '1', 'enable', 'e', 'enabled']); | ||
| const falsy = new Set(['no', 'false', '0', 'disable', 'd', 'disabled']); | ||
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| /** | ||
| * Method to detect if the current host has colors enabled or not. The result is cached on the first | ||
| * invocation of {@link hasColoursSupported}, the rest will just return that variable. | ||
| */ | ||
| export function hasColoursSupported() { | ||
| // Check if we have the `process` global available. If not, let's not enable it. | ||
| if (!isNode) { | ||
| return false; | ||
| } | ||
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| // Check if the `NO_COLOR` system enviornment variable is available. | ||
| if ('NO_COLOR' in process.env) { | ||
| return false; | ||
| } | ||
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| // Check if `FORCE_COLORS` exists and see if it is truthy. | ||
| if ('FORCE_COLORS' in process.env) { | ||
| // Check if it is a truthy value | ||
| if (truthy.has(process.env.FORCE_COLORS)) { | ||
| return true; | ||
| } | ||
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| // Check if `FORCE_COLORS` was a falsy value | ||
| if (falsy.has(process.env.FORCE_COLORS)) { | ||
| return true; | ||
| } | ||
| } | ||
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| // Check if any CI service supports colours | ||
| if ('CI' in process.env) { | ||
| return ['GITHUB_ACTIONS', 'TRAVIS', 'CIRCLECI', 'APPVEYOR', 'GITLAB_CI', 'BUILDKITE', 'DRONE'].some(i => i in process.env) || ( | ||
| typeof process.env.CI_NAME !== undefined && process.env.CI_NAME === 'codeship' | ||
| ); | ||
| } | ||
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| // Check if the process' standard output has colours enabled from the `hasColors` function. | ||
| if (typeof process.stdout?.hasColors !== 'undefined') { | ||
| return process.stdout.hasColors(); | ||
| } | ||
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| // Otherwise, fallback to false | ||
| return false; | ||
| } |