feat: add no-package-lock mode to npm audit

docs/lib/content/commands/npm-audit.md

@@ -30,6 +30,13 @@ vulnerability is found. It may be useful in CI environments to include the
 will cause the command to fail. This option does not filter the report
 output, it simply changes the command's failure threshold.
 
+### Package lock
+
+By default npm requires a package-lock or shrinkwrap in order to run the
+audit.  You can bypass the package lock with `--no-package-lock` but be
+aware the results may be different with every run, since npm will
+re-build the dependency tree each time.
+
 ### Audit Signatures
 
 To ensure the integrity of packages you download from the public npm registry, or any registry that supports signatures, you can verify the registry signatures of downloaded packages using the npm CLI.

docs/lib/content/commands/npm-query.md

@@ -133,6 +133,7 @@ npm query ":type(git)" | jq 'map(.name)' | xargs -I {} npm why {}
   },
   ...
 ```
+
 ### Package lock only mode
 
 If package-lock-only is enabled, only the information in the package

lib/commands/audit.js

@@ -404,6 +404,7 @@ class Audit extends ArboristWorkspaceCmd {
     'force',
     'json',
     'package-lock-only',
+    'package-lock',
     'omit',
     'foreground-scripts',
     'ignore-scripts',
@@ -439,6 +440,10 @@ class Audit extends ArboristWorkspaceCmd {
   }
 
   async auditAdvisories (args) {
+    const fix = args[0] === 'fix'
+    if (this.npm.config.get('package-lock') === false && fix) {
+      throw this.usageError('fix can not be used without a package-lock')
+    }
     const reporter = this.npm.config.get('json') ? 'json' : 'detail'
     const Arborist = require('@npmcli/arborist')
     const opts = {
@@ -450,7 +455,6 @@ class Audit extends ArboristWorkspaceCmd {
     }
 
     const arb = new Arborist(opts)
-    const fix = args[0] === 'fix'
     await arb.audit({ fix })
     if (fix) {
       await reifyFinish(this.npm, arb)

tap-snapshots/test/lib/docs.js.test.cjs

@@ -2526,7 +2526,7 @@ npm audit [fix|signatures]
 
 Options:
 [--audit-level <info|low|moderate|high|critical|none>] [--dry-run] [-f|--force]
-[--json] [--package-lock-only]
+[--json] [--package-lock-only] [--no-package-lock]
 [--omit <dev|optional|peer> [--omit <dev|optional|peer> ...]]
 [--foreground-scripts] [--ignore-scripts]
 [-w|--workspace <workspace-name> [-w|--workspace <workspace-name> ...]]
@@ -2543,6 +2543,7 @@ npm audit [fix|signatures]
 #### \`force\`
 #### \`json\`
 #### \`package-lock-only\`
+#### \`package-lock\`
 #### \`omit\`
 #### \`foreground-scripts\`
 #### \`ignore-scripts\`

test/lib/commands/audit.js

@@ -210,6 +210,18 @@ t.test('audit fix - bulk endpoint', async t => {
   )
 })
 
+t.test('audit fix no package lock', async t => {
+  const { npm } = await loadMockNpm(t, {
+    config: {
+      'package-lock': false,
+    },
+  })
+  await t.rejects(
+    npm.exec('audit', ['fix']),
+    { code: 'EUSAGE' }
+  )
+})
+
 t.test('completion', async t => {
   const { audit } = await loadMockNpm(t, { command: 'audit' })
   t.test('fix', async t => {

workspaces/arborist/lib/arborist/audit.js

@@ -22,7 +22,15 @@ module.exports = cls => class Auditor extends cls {
     options = { ...this.options, ...options }
 
     process.emit('time', 'audit')
-    const tree = await this.loadVirtual()
+    let tree
+    if (options.packageLock === false) {
+      // build ideal tree
+      await this.loadActual(options)
+      await this.buildIdealTree()
+      tree = this.idealTree
+    } else {
+      tree = await this.loadVirtual()
+    }
     if (this[_workspaces] && this[_workspaces].length) {
       options.filterSet = this.workspaceDependencySet(
         tree,

workspaces/arborist/test/arborist/audit.js

@@ -27,6 +27,15 @@ t.test('audit finds the bad deps', async t => {
   t.equal(report.size, 2)
 })
 
+t.test('no package lock finds no bad deps', async t => {
+  const path = resolve(fixtures, 'deprecated-dep')
+  t.teardown(auditResponse(resolve(fixtures, 'audit-nyc-mkdirp/audit.json')))
+  const arb = newArb(path, { packageLock: false })
+  const report = await arb.audit()
+  t.equal(report.topVulns.size, 0)
+  t.equal(report.size, 0)
+})
+
 t.test('audit fix reifies out the bad deps', async t => {
   const path = fixture(t, 'deprecated-dep')
   t.teardown(auditResponse(resolve(fixtures, 'audit-nyc-mkdirp/audit.json')))