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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 | import { fileURLToPath } from "node:url"; import { spawn } from "node:child_process"; import * as readline from "node:readline"; export type ParsedCommit = { hash: string; timestamp: number; authorName: string; authorEmail: string; message: string; addedLines: number; removedLines: number; }; type ParseOptions = { /** * If true, do NOT count numstat lines for merge commits (parents.length > 1). * This avoids huge / confusing stats for merges. */ suppressMergeStats?: boolean; /** * If true, skip merge commits entirely (they will not appear in the result). */ skipMerges?: boolean; }; type InternalCommit = ParsedCommit & { parents: string[]; isMerge: boolean; messageLines: string[]; }; const COMMIT_MARKER = "@@@"; /** * Parse `git log --numstat` output produced by: * * git log <branch> \ * --no-decorate \ * --pretty=format:'@@@%n%H|%P|%ct|%an|%ae%n%B' \ * --numstat */ export async function getCommitsWithLineStats( repoDir: string, branch: string, options: ParseOptions = {}, ): Promise<ParsedCommit[]> { const suppressMergeStats = options.suppressMergeStats ?? true; const skipMerges = options.skipMerges ?? false; // Run git const child = spawn("git", getGitLogArgs(branch), { cwd: repoDir, stdio: ["ignore", "pipe", "pipe"], }); const rl = readline.createInterface({ input: child.stdout }); const commits: ParsedCommit[] = []; let current: InternalCommit | null = null; let expectHeaderNext = false; let collectingMessage = false; function finalizeCurrent() { if (!current) return; current.message = current.messageLines.join("\n").replace(/\n+$/g, ""); if (!(skipMerges && current.isMerge)) { // Drop internal fields const { parents: _p, isMerge: _m, messageLines: _ml, ...publicCommit } = current; commits.push(publicCommit); } current = null; collectingMessage = false; } rl.on("line", (line) => { // Marker line indicates the next non-empty line is the header if (line === COMMIT_MARKER) { finalizeCurrent(); expectHeaderNext = true; return; } if (expectHeaderNext) { if (line.trim() === "") return; // skip accidental blanks expectHeaderNext = false; // Header format: %H|%P|%ct|%an|%ae const parts = line.split("|"); if (parts.length < 5) { throw new Error(`Malformed commit header: ${line}`); } const hash = parts[0]; const parentsRaw = parts[1]; const timestampRaw = parts[2]; const authorName = parts[3]; const authorEmail = parts[4]; const parents = parentsRaw.trim() === "" ? [] : parentsRaw.trim().split(/\s+/); const isMerge = parents.length > 1; current = { hash, timestamp: Number(timestampRaw), authorName, authorEmail, message: "", addedLines: 0, removedLines: 0, parents, isMerge, messageLines: [], }; collectingMessage = true; if (!Number.isFinite(current.timestamp)) { throw new Error(`Invalid timestamp in header: ${line}`); } return; } // If we don't currently have a commit, ignore stray lines. if (!current) return; const m = /^(\d+|-)\t(\d+|-)\t/.exec(line); if (!m) { if (collectingMessage) { current.messageLines.push(line); } return; } collectingMessage = false; // Option: suppress stats for merge commits if (suppressMergeStats && current.isMerge) { return; } const addedStr = m[1]; const removedStr = m[2]; if (addedStr !== "-" && removedStr !== "-") { const added = Number(addedStr); const removed = Number(removedStr); // Be paranoid: ensure numeric if (Number.isFinite(added)) current.addedLines += added; if (Number.isFinite(removed)) current.removedLines += removed; } }); const exitCode: number = await new Promise((resolve, reject) => { child.on("error", reject); child.on("close", resolve); }); // Finish last commit (if any) finalizeCurrent(); rl.close(); // Read stderr if command failed if (exitCode !== 0) { const stderr = await streamToString(child.stderr); throw new Error(`git log failed (exit ${exitCode}): ${stderr.trim()}`); } return commits; } function streamToString(stream: NodeJS.ReadableStream | null | undefined): Promise<string> { if (!stream) return Promise.resolve(""); return new Promise((resolve, reject) => { let s = ""; stream.setEncoding("utf8"); stream.on("data", (chunk) => (s += chunk)); stream.on("end", () => resolve(s)); stream.on("error", reject); }); } function getGitLogArgs(branch: string): string[] { return [ "log", branch, "--no-decorate", "--pretty=format:@@@%n%H|%P|%ct|%an|%ae%n%B", "--numstat", ]; } import { mkdir, writeFile } from "node:fs/promises"; import { join } from "node:path"; if (process.argv[1] === fileURLToPath(import.meta.url)) { const run = async () => { const debugGit = process.argv.includes("--debug-git"); if (debugGit) { const child = spawn("git", getGitLogArgs("main"), { cwd: process.cwd(), stdio: "inherit", }); const exitCode: number = await new Promise((resolve, reject) => { child.on("error", reject); child.on("close", resolve); }); process.exit(exitCode); } getCommitsWithLineStats(process.cwd(), "main") .then(async (commits) => { const sorted = commits.sort((a, b) => b.timestamp - a.timestamp); const outDir = join(process.cwd(), "public/project-history"); const outFile = join(outDir, "git-timeline.json"); await mkdir(outDir, { recursive: true }); await writeFile(outFile, JSON.stringify(sorted, null, 2), "utf8"); console.log(`Saved ${sorted.length} commits to ${outFile}`); } ) .catch((err) => { console.error(err); process.exit(1); }); }; void run(); } |