56 lines
2.2 KiB
TypeScript
56 lines
2.2 KiB
TypeScript
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/**
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* Terminal output helpers. All ANSI escapes go through here — callers
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* never check `isatty` or splice `\x1b[` themselves.
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*
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* Computed once at import. stderr is the reference fd since all our
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* progress/status output goes there (stdout is reserved for the
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* program's actual output in `bd` mode).
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*/
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import { isatty } from "node:tty";
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/**
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* True when stderr is a terminal a human is watching — enables ANSI
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* colors, cursor control, and live FD3 streaming. False for pipes,
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* files, and CI log capture.
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*/
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export const interactive: boolean = isatty(2);
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const useColor = interactive && (globalThis.Bun?.enableANSIColors ?? true);
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export const dim = (s: string): string => (useColor ? `\x1b[2m${s}\x1b[22m` : s);
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export const cyan = (s: string): string => (useColor ? `\x1b[36m${s}\x1b[39m` : s);
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export const green = (s: string): string => (useColor ? `\x1b[32m${s}\x1b[39m` : s);
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export const red = (s: string): string => (useColor ? `\x1b[31m${s}\x1b[39m` : s);
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/**
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* Hash a name to a stable 256-color. Same name → same color across runs,
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* so `[tinycc]` in stream output and `tinycc` in the done line match.
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* zig overridden to brand orange.
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*
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* `color` defaults to this module's stderr-TTY check. stream.ts passes
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* its own — it writes to FD 3 (a terminal when set up by build.ts) while
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* its FD 2 is a ninja pipe, so the default check would wrongly disable.
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*/
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export function nameColor(name: string, text: string = name, color: boolean = useColor): string {
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if (!color) return text;
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const overrides: Record<string, number> = { zig: 214 };
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const palette = [220, 184, 154, 120, 114, 86, 87, 81, 111, 147, 141, 183];
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let h = 2166136261;
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for (let i = 0; i < name.length; i++) {
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h ^= name.charCodeAt(i);
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h = Math.imul(h, 16777619);
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}
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const c = overrides[name] ?? palette[(h >>> 0) % palette.length];
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return `\x1b[38;5;${c}m${text}\x1b[39m`;
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}
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/**
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* Write a status line to stderr. In a terminal, clears the current line
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* first (erases ninja's [N/M] progress or stream.ts prefixes that may be
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* sitting there). In a pipe, just writes.
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*/
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export function status(line: string): void {
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process.stderr.write(interactive ? `\r\x1b[K${line}\n` : `${line}\n`);
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}
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