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Merge PR #1330: gbrain-valid source ids

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Garry Tan
2026-05-06 10:59:05 -07:00
parent 465d44875b 59d3075708
commit 300b4ae588
2 changed files with 72 additions and 7 deletions
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38
bin/gstack-gbrain-sync.ts
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@@ -33,6 +33,7 @@ import { existsSync, statSync, mkdirSync, writeFileSync, readFileSync, unlinkSyn
import { join, dirname } from "path";
import { execSync, execFileSync, spawnSync } from "child_process";
import { homedir } from "os";
import { createHash } from "crypto";
import { detectEngineTier, withErrorContext, canonicalizeRemote } from "../lib/gstack-memory-helpers";
import { sourcePageCount } from "../lib/gbrain-sources";
@@ -158,20 +159,43 @@ function originUrl(): string | null {
}
/**
* Derive a stable source id for the cwd code corpus. Pattern: `gstack-code-<slug>`,
* where <slug> comes from canonicalizeRemote() then `/` → `-` (e.g.,
* `github.com/garrytan/gstack` → `gstack-code-github-com-garrytan-gstack`).
* Derive a stable source id for the cwd code corpus. Pattern: `gstack-code-<slug>`.
*
* Falls back to `gstack-code-<basename(repo)>` when there is no origin (local repo).
* gbrain enforces source ids to be 1-32 lowercase alnum chars with optional interior
* hyphens. We use the last two segments of the canonical remote (org/repo) and skip
* the host — `github.com` etc. is the same for nearly every user and just eats budget.
* If the resulting id still exceeds 32 chars, we keep the tail (most distinctive end)
* and append a 6-char hash of the full slug for collision resistance.
*
* Falls back to the repo basename when there is no origin (local repo).
*/
function deriveCodeSourceId(repoPath: string): string {
const remote = canonicalizeRemote(originUrl());
if (remote) {
return `gstack-code-${remote.replace(/[\/\s]+/g, "-").replace(/-+/g, "-")}`;
const segs = remote.split("/").filter(Boolean);
const slugSource = segs.slice(-2).join("-");
return constrainSourceId("gstack-code", slugSource);
}
// Fallback for repos without a remote.
const base = repoPath.split("/").pop() || "repo";
return `gstack-code-${base.toLowerCase().replace(/[^a-z0-9-]+/g, "-").replace(/-+/g, "-")}`;
return constrainSourceId("gstack-code", base);
}
/**
* Build a gbrain-valid source id (1-32 lowercase alnum + interior hyphens). Sanitizes
* `raw`, prefixes with `prefix`, and falls back to a hashed-tail form when total length
* would exceed 32 chars.
*/
function constrainSourceId(prefix: string, raw: string): string {
const MAX = 32;
const slug = raw.toLowerCase().replace(/[^a-z0-9]+/g, "-").replace(/^-+|-+$/g, "");
const full = `${prefix}-${slug}`;
if (full.length <= MAX) return full;
const hash = createHash("sha1").update(slug).digest("hex").slice(0, 6);
// Total budget: prefix + "-" + tail + "-" + hash
const tailBudget = MAX - prefix.length - 2 - hash.length;
if (tailBudget < 1) return `${prefix}-${hash}`;
const tail = slug.slice(-tailBudget).replace(/^-+|-+$/g, "");
return tail ? `${prefix}-${tail}-${hash}` : `${prefix}-${hash}`;
}
function gbrainAvailable(): boolean {