feat(git): biome pre-commit hook

blocks the commit when it finds biome issues with the changed code

Author: Dhruv-0-Arora

fission/package.json

@@ -27,6 +27,7 @@
     "assetpack:update": "bun update_manifest.ts && cd public && zip -FS -r assetpack.zip Downloadables -x '**/.*' -x '**/__MACOSX'",
     "assetpack:merge": "git checkout --theirs public/assetpack.zip && rm -rf public/Downloadables && tar -xf public/assetpack.zip -C public/ && git checkout --ours public/assetpack.zip && tar -xf public/assetpack.zip -C public/ && bun run assetpack:update",
     "playwright:install": "bun x playwright install",
+    "hooks:install": "bun scripts/hooks/install.ts",
     "lockfile:clean": "bun x replace-regex --from='https:\\/\\/npm.autodesk.com\\/artifactory\\/[a-zA-Z0-9_.\\/@-]*' --to='' ./bun.lock",
     "postinstall": "bun run lockfile:clean | bun x dev-null"
   },

fission/scripts/hooks/install.ts

@@ -0,0 +1,37 @@
+import { execFileSync } from "node:child_process"
+import { chmodSync, copyFileSync, existsSync, mkdirSync } from "node:fs"
+import { join } from "node:path"
+
+const HOOKS = ["pre-commit"]
+
+function gitCommonDir(): string | null {
+    try {
+        return execFileSync("git", ["rev-parse", "--path-format=absolute", "--git-common-dir"], {
+            encoding: "utf8",
+            stdio: ["ignore", "pipe", "ignore"],
+        }).trim()
+    } catch {
+        return null
+    }
+}
+
+const commonDir = gitCommonDir()
+if (!commonDir) {
+    console.log("hooks:install: not a git repository, skipping.")
+    process.exit(0)
+}
+
+const hooksDir = join(commonDir, "hooks")
+mkdirSync(hooksDir, { recursive: true })
+
+for (const hook of HOOKS) {
+    const src = join(import.meta.dirname, hook)
+    if (!existsSync(src)) {
+        console.warn(`hooks:install: source hook missing: ${src}`)
+        continue
+    }
+    const dest = join(hooksDir, hook)
+    copyFileSync(src, dest)
+    chmodSync(dest, 0o755)
+    console.log(`hooks:install: installed ${hook} -> ${dest}`)
+}

fission/scripts/hooks/pre-commit

@@ -0,0 +1,33 @@
+#!/usr/bin/env sh
+#
+# Pre-commit hook: block commits that fail Biome format/lint in fission/.
+
+set -e
+
+repo_root=$(git rev-parse --show-toplevel)
+fission_dir="$repo_root/fission"
+
+export GIT_WORK_TREE="$repo_root"
+
+if ! command -v bun >/dev/null 2>&1; then
+  echo "pre-commit: bun not found on PATH, skipping Biome check." >&2
+  exit 0
+fi
+
+cd "$fission_dir"
+
+staged_list=$(mktemp)
+trap 'rm -f "$staged_list"' EXIT
+git diff --cached --name-only --diff-filter=ACMR --relative -z -- . >"$staged_list"
+
+if [ ! -s "$staged_list" ]; then
+  exit 0
+fi
+
+if ! xargs -0 bun x biome check --no-errors-on-unmatched --files-ignore-unknown=true <"$staged_list"; then
+  echo "" >&2
+  echo "pre-commit: Biome found issues in staged fission/ files (see above)." >&2
+  echo "  Fix them with:  cd fission && bun run style:fix" >&2
+  echo "  Then re-stage and commit again." >&2
+  exit 1
+fi