fix(unpublish): Show warning on unpublish command when last version (#4191)

1 files changed, 24 insertions, 2 deletions

diff --git a/lib/commands/unpublish.js b/lib/commands/unpublish.js
index 578890025..85c366381 100644
--- a/lib/commands/unpublish.js
+++ b/lib/commands/unpublish.js
@@ -9,6 +9,10 @@ const log = require('../utils/log-shim')
 const otplease = require('../utils/otplease.js')
 const getIdentity = require('../utils/get-identity.js')
 
+const LAST_REMAINING_VERSION_ERROR = 'Refusing to delete the last version of the package. ' +
+'It will block from republishing a new version for 24 hours.\n' +
+'Run with --force to do this.'
+
 const BaseCommand = require('../base-command.js')
 class Unpublish extends BaseCommand {
   static description = 'Remove a package from the registry'
@@ -16,6 +20,11 @@ class Unpublish extends BaseCommand {
   static params = ['dry-run', 'force', 'workspace', 'workspaces']
   static usage = ['[<@scope>/]<pkg>[@<version>]']
 
+  async getKeysOfVersions (name, opts) {
+    const json = await npmFetch.json(npa(name).escapedName, opts)
+    return Object.keys(json.versions)
+  }
+
   async completion (args) {
     const { partialWord, conf } = args
 
@@ -44,8 +53,7 @@ class Unpublish extends BaseCommand {
       return pkgs
     }
 
-    const json = await npmFetch.json(npa(pkgs[0]).escapedName, opts)
-    const versions = Object.keys(json.versions)
+    const versions = await this.getKeysOfVersions(pkgs[0], opts)
     if (!versions.length) {
       return pkgs
     } else {
@@ -97,12 +105,26 @@ class Unpublish extends BaseCommand {
       const { name, version, publishConfig } = manifest
       const pkgJsonSpec = npa.resolve(name, version)
       const optsWithPub = { ...opts, publishConfig }
+
+      const versions = await this.getKeysOfVersions(name, optsWithPub)
+      if (versions.length === 1 && !force) {
+        throw this.usageError(
+          LAST_REMAINING_VERSION_ERROR
+        )
+      }
+
       if (!dryRun) {
         await otplease(opts, opts => libunpub(pkgJsonSpec, optsWithPub))
       }
       pkgName = name
       pkgVersion = version ? `@${version}` : ''
     } else {
+      const versions = await this.getKeysOfVersions(spec.name, opts)
+      if (versions.length === 1 && !force) {
+        throw this.usageError(
+          LAST_REMAINING_VERSION_ERROR
+        )
+      }
       if (!dryRun) {
         await otplease(opts, opts => libunpub(spec, opts))
       }