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my-project-public — gitlawb

#1	/**
#2	* Upstream Awareness
#3	*
#4	* Helpers for the automaton to know its own git origin,
#5	* detect new upstream commits, and review diffs.
#6	* All git commands run locally via child_process (not sandbox API).
#7	*/
#8
#9	import { execSync } from "child_process";
#10
#11	const REPO_ROOT = process.cwd();
#12
#13	function git(cmd: string): string {
#14	return execSync(`git ${cmd}`, {
#15	cwd: REPO_ROOT,
#16	encoding: "utf-8",
#17	timeout: 15_000,
#18	}).trim();
#19	}
#20
#21	/**
#22	* Return origin URL (credentials stripped), current branch, and HEAD info.
#23	*/
#24	export function getRepoInfo(): {
#25	originUrl: string;
#26	branch: string;
#27	headHash: string;
#28	headMessage: string;
#29	} {
#30	const rawUrl = git("config --get remote.origin.url");
#31	// Strip embedded credentials (https://user:token@host/... -> https://host/...)
#32	const originUrl = rawUrl.replace(/\/\/[^@]+@/, "//");
#33	const branch = git("rev-parse --abbrev-ref HEAD");
#34	const headLine = git('log -1 --format="%h %s"');
#35	const [headHash, ...rest] = headLine.split(" ");
#36	return { originUrl, branch, headHash, headMessage: rest.join(" ") };
#37	}
#38
#39	/**
#40	* Fetch origin and report how many commits we're behind.
#41	*/
#42	export function checkUpstream(): {
#43	behind: number;
#44	commits: { hash: string; message: string }[];
#45	} {
#46	git("fetch origin main --quiet");
#47	const log = git("log HEAD..origin/main --oneline");
#48	if (!log) return { behind: 0, commits: [] };
#49	const commits = log.split("\n").map((line) => {
#50	const [hash, ...rest] = line.split(" ");
#51	return { hash, message: rest.join(" ") };
#52	});
#53	return { behind: commits.length, commits };
#54	}
#55
#56	/**
#57	* Return per-commit diffs for every commit ahead of HEAD on origin/main.
#58	*/
#59	export function getUpstreamDiffs(): {
#60	hash: string;
#61	message: string;
#62	author: string;
#63	diff: string;
#64	}[] {
#65	const log = git('log HEAD..origin/main --format="%H %an\|\|\|%s"');
#66	if (!log) return [];
#67
#68	return log.split("\n").map((line) => {
#69	const [hashAndAuthor, message] = line.split("\|\|\|");
#70	const parts = hashAndAuthor.split(" ");
#71	const hash = parts[0];
#72	const author = parts.slice(1).join(" ");
#73	let diff: string;
#74	try {
#75	diff = git(`diff ${hash}~1..${hash}`);
#76	} catch {
#77	// First commit in the range may not have a parent
#78	diff = git(`show ${hash} --format="" --stat`);
#79	}
#80	return { hash: hash.slice(0, 12), message, author, diff };
#81	});
#82	}
#83

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