96 lines
2.6 KiB
Bash
96 lines
2.6 KiB
Bash
#!/usr/bin/env bash
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#
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# resolve-package-manager.sh — detect which JS package manager a project uses
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# by inspecting lockfiles, and emit the binary name plus canonical command tail.
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#
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# Usage:
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# resolve-package-manager.sh [path]
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#
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# Arguments:
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# path (optional) — directory to inspect. When omitted, defaults to the
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# repo root via `git rev-parse --show-toplevel`.
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#
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# Output contract (two lines on stdout):
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# Line 1: package-manager binary token (`npm` | `pnpm` | `yarn` | `bun`)
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# Line 2: canonical argv tail for running a dev script
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# - npm: "run dev" (npm requires the `run` verb)
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# - pnpm: "dev" (pnpm allows bare script names)
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# - yarn: "dev" (yarn allows bare script names)
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# - bun: "run dev" (bun requires the `run` verb)
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#
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# Lockfile priority order (first match wins):
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# 1. pnpm-lock.yaml -> pnpm
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# 2. yarn.lock -> yarn
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# 3. bun.lock -> bun (text format, preferred — newer canonical)
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# 4. bun.lockb -> bun (binary format, legacy)
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# 5. package-lock.json -> npm
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# When both bun.lock and bun.lockb are present, bun.lock (text) is checked
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# first and wins because it is the newer canonical format.
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#
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# Sentinel (stdout, exit 0):
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# __NO_PACKAGE_JSON__ — the target directory has no package.json
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#
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# Errors (stderr, exit 1):
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# ERROR: <message> — path does not exist, is not a directory, or
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# no positional arg and not inside a git repo
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set -u
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TARGET_PATH="${1:-}"
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# Resolve target directory: positional arg or git repo root.
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if [ -n "$TARGET_PATH" ]; then
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if [ ! -d "$TARGET_PATH" ]; then
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echo "ERROR: path does not exist or is not a directory: $TARGET_PATH" >&2
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exit 1
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fi
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else
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TARGET_PATH=$(git rev-parse --show-toplevel 2>/dev/null)
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if [ -z "$TARGET_PATH" ]; then
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echo "ERROR: not in a git repository and no path argument provided" >&2
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exit 1
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fi
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fi
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# Sentinel: no package.json means this is not a JS/TS project.
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if [ ! -f "$TARGET_PATH/package.json" ]; then
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echo "__NO_PACKAGE_JSON__"
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exit 0
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fi
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# Check lockfiles in priority order.
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if [ -f "$TARGET_PATH/pnpm-lock.yaml" ]; then
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echo "pnpm"
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echo "dev"
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exit 0
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fi
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if [ -f "$TARGET_PATH/yarn.lock" ]; then
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echo "yarn"
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echo "dev"
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exit 0
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fi
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if [ -f "$TARGET_PATH/bun.lock" ]; then
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echo "bun"
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echo "run dev"
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exit 0
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fi
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if [ -f "$TARGET_PATH/bun.lockb" ]; then
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echo "bun"
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echo "run dev"
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exit 0
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fi
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if [ -f "$TARGET_PATH/package-lock.json" ]; then
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echo "npm"
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echo "run dev"
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exit 0
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fi
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# Fallback: package.json present but no recognized lockfile.
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echo "npm"
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echo "run dev"
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exit 0
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