Colors in logs

src/components/ansi/Ansi.tsx

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+import { tokenizeAnsi } from "./tokenize";
+
+type AnsiTextProps = {
+  text: string;
+  className?: string;
+};
+
+const ANSI_TW_CLASSES: Record<string, string> = {
+  black: "text-black",
+  red: "text-red-500",
+  green: "text-emerald-500",
+  yellow: "text-yellow-400",
+  blue: "text-blue-400",
+  magenta: "text-purple-400",
+  cyan: "text-cyan-400",
+  white: "text-gray-100",
+
+  brightBlack: "text-gray-500",
+  brightRed: "text-red-400",
+  brightGreen: "text-emerald-400",
+  brightYellow: "text-yellow-300",
+  brightBlue: "text-blue-300",
+  brightMagenta: "text-purple-300",
+  brightCyan: "text-cyan-300",
+  brightWhite: "text-white",
+};
+
+export function AnsiText({ text, className }: AnsiTextProps) {
+  const tokens = tokenizeAnsi(text);
+
+  return (
+    <span className={`whitespace-pre-wrap font-mono ${className ?? ""}`}>
+      {tokens.map((token, i) => {
+        const classes = [
+          token.style.color && ANSI_TW_CLASSES[token.style.color],
+          token.style.bold && "font-semibold",
+          token.style.underline && "underline",
+        ]
+          .filter(Boolean)
+          .join(" ");
+
+        return (
+          <span key={i} className={classes}>
+            {token.text}
+          </span>
+        );
+      })}
+    </span>
+  );
+}

src/components/ansi/parser.ts

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+export type StyleState = {
+  color?: string;
+  bold?: boolean;
+  underline?: boolean;
+};
+
+export const ANSI_REGEX = /\u001b\[([0-9;]*)m/g;
+
+const COLOR_CODES: Record<number, string> = {
+  30: "black",
+  31: "red",
+  32: "green",
+  33: "yellow",
+  34: "blue",
+  35: "magenta",
+  36: "cyan",
+  37: "white",
+
+  90: "brightBlack",
+  91: "brightRed",
+  92: "brightGreen",
+  93: "brightYellow",
+  94: "brightBlue",
+  95: "brightMagenta",
+  96: "brightCyan",
+  97: "brightWhite",
+};
+
+export function applyAnsiCodes(codes: number[], state: StyleState): StyleState {
+  let next = { ...state };
+
+  for (const code of codes) {
+    if (code === 0) {
+      next = {};
+    } else if (code === 1) {
+      next.bold = true;
+    } else if (code === 4) {
+      next.underline = true;
+    } else if (COLOR_CODES[code]) {
+      next.color = COLOR_CODES[code];
+    }
+  }
+
+  return next;
+}

src/components/ansi/tokenize.ts

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+import { ANSI_REGEX, applyAnsiCodes, StyleState } from "./parser";
+
+export type Token = {
+  text: string;
+  style: StyleState;
+};
+
+export function tokenizeAnsi(input: string): Token[] {
+  const tokens: Token[] = [];
+
+  let lastIndex = 0;
+  let match: RegExpExecArray | null;
+  let style: StyleState = {};
+
+  while ((match = ANSI_REGEX.exec(input))) {
+    const index = match.index;
+
+    if (index > lastIndex) {
+      tokens.push({
+        text: input.slice(lastIndex, index),
+        style,
+      });
+    }
+
+    const codes = match[1].split(";").map(Number);
+    style = applyAnsiCodes(codes, style);
+
+    lastIndex = ANSI_REGEX.lastIndex;
+  }
+
+  if (lastIndex < input.length) {
+    tokens.push({
+      text: input.slice(lastIndex),
+      style,
+    });
+  }
+
+  return tokens;
+}