Support exec auto pick bin when all bin is alias

PR-URL: npm#1972
Credit: @dr-js
Close: npm#1972
Reviewed-by: @isaacs

docs/content/commands/npm-exec.md

@@ -54,7 +54,8 @@ the package specifier provided as the first positional argument according
 to the following heuristic:
 
 - If the package has a single entry in its `bin` field in `package.json`,
-  then that command will be used.
+  or if all entries are aliases of the same command, then that command
+  will be used.
 - If the package has multiple `bin` entries, and one of them matches the
   unscoped portion of the `name` field, then that command will be used.
 - If this does not result in exactly one option (either because there are

docs/content/commands/npx.md

@@ -8,9 +8,9 @@ description: Run a command from a local or remote npm package
 
 ```bash
 npm exec -- <pkg>[@<version>] [args...]
-npm exec -p <pkg>[@<version>] -- <cmd> [args...]
+npm exec --package=<pkg>[@<version>] -- <cmd> [args...]
 npm exec -c '<cmd> [args...]'
-npm exec -p foo -c '<cmd> [args...]'
+npm exec --package=foo -c '<cmd> [args...]'
 
 npx <pkg>[@<specifier>] [args...]
 npx -p <pkg>[@<specifier>] <cmd> [args...]
@@ -19,7 +19,8 @@ npx -p <pkg>[@<specifier>] -c '<cmd> [args...]'
 
 alias: npm x, npx
 
--p <pkg> --package=<pkg> (may be specified multiple times)
+--package=<pkg> (may be specified multiple times)
+-p is a shorthand for --package only when using npx executable
 -c <cmd> --call=<cmd> (may not be mixed with positional arguments)
 ```
 
@@ -29,9 +30,9 @@ This command allows you to run an arbitrary command from an npm package
 (either one installed locally, or fetched remotely), in a similar context
 as running it via `npm run`.
 
-Whatever packages are specified by the `--package` or `-p` option will be
+Whatever packages are specified by the `--package` option will be
 provided in the `PATH` of the executed command, along with any locally
-installed package executables.  The `--package` or `-p` option may be
+installed package executables.  The `--package` option may be
 specified multiple times, to execute the supplied command in an environment
 where all specified packages are available.
 
@@ -47,13 +48,14 @@ only be considered a match if they have the exact same name and version as
 the local dependency.
 
 If no `-c` or `--call` option is provided, then the positional arguments
-are used to generate the command string.  If no `-p` or `--package` options
+are used to generate the command string.  If no `--package` options
 are provided, then npm will attempt to determine the executable name from
 the package specifier provided as the first positional argument according
 to the following heuristic:
 
 - If the package has a single entry in its `bin` field in `package.json`,
-  then that command will be used.
+  or if all entries are aliases of the same command, then that command
+  will be used.
 - If the package has multiple `bin` entries, and one of them matches the
   unscoped portion of the `name` field, then that command will be used.
 - If this does not result in exactly one option (either because there are

lib/exec.js

@@ -226,15 +226,15 @@ const manifestMissing = (tree, mani) => {
 
 const getBinFromManifest = mani => {
   // if we have a bin matching (unscoped portion of) packagename, use that
-  // otherwise if there's 1 bin, use that,
+  // otherwise if there's 1 bin or all bin value is the same (alias), use that,
   // otherwise fail
-  const bins = Object.entries(mani.bin || {})
-  if (bins.length === 1)
-    return bins[0][0]
+  const bin = mani.bin || {}
+  if (new Set(Object.values(bin)).size === 1)
+    return Object.keys(bin)[0]
 
   // XXX probably a util to parse this better?
   const name = mani.name.replace(/^@[^/]+\//, '')
-  if (mani.bin && mani.bin[name])
+  if (bin[name])
     return name
 
   // XXX need better error message

test/lib/exec.js

@@ -386,6 +386,75 @@ t.test('npm exec @foo/bar -- --some=arg, locally installed', async t => {
   }])
 })
 
+t.test('npm exec @foo/bar, with same bin alias and no unscoped named bin, locally installed', async t => {
+  const foobarManifest = {
+    name: '@foo/bar',
+    version: '1.2.3',
+    bin: {
+      baz: 'corge', // pick the first one
+      qux: 'corge',
+      quux: 'corge',
+    }
+  }
+  const path = t.testdir({
+    node_modules: {
+      '@foo/bar': {
+        'package.json': JSON.stringify(foobarManifest)
+      }
+    }
+  })
+  npm.localPrefix = path
+  ARB_ACTUAL_TREE[path] = {
+    children: new Map([['@foo/bar', { name: '@foo/bar', version: '1.2.3' }]])
+  }
+  MANIFESTS['@foo/bar'] = foobarManifest
+  await exec(['@foo/bar'], er => {
+    if (er) {
+      throw er
+    }
+  })
+  t.strictSame(MKDIRPS, [], 'no need to make any dirs')
+  t.match(ARB_CTOR, [ { package: ['@foo/bar'], path } ])
+  t.strictSame(ARB_REIFY, [], 'no need to reify anything')
+  t.equal(PROGRESS_ENABLED, true, 'progress re-enabled')
+  t.match(RUN_SCRIPTS, [{
+    pkg: { scripts: { npx: 'baz' } },
+    banner: false,
+    path: process.cwd(),
+    stdioString: true,
+    event: 'npx',
+    env: { PATH: process.env.PATH },
+    stdio: 'inherit'
+  }])
+})
+
+t.test('npm exec @foo/bar, with different bin alias and no unscoped named bin, locally installed', t => {
+  const path = t.testdir()
+  npm.localPrefix = path
+  ARB_ACTUAL_TREE[path] = {
+    children: new Map([['@foo/bar', { name: '@foo/bar', version: '1.2.3' }]])
+  }
+  MANIFESTS['@foo/bar'] = {
+    name: '@foo/bar',
+    version: '1.2.3',
+    bin: {
+      foo: 'qux',
+      corge: 'qux',
+      baz: 'quux',
+    },
+    _from: 'foo@',
+    _id: '@foo/[email protected]'
+  }
+  return t.rejects(exec(['@foo/bar'], er => {
+    if (er) {
+      throw er
+    }
+  }), {
+    message: 'could not determine executable to run',
+    pkgid: '@foo/[email protected]'
+  })
+})
+
 t.test('run command with 2 packages, need install, verify sort', t => {
   // test both directions, should use same install dir both times
   // also test the read() call here, verify that the prompts match