From db2953aa5325f2aface0ceb4b60e3916ae0e7a2b Mon Sep 17 00:00:00 2001
From: Zoltan Kochan <z@kochan.io>
Date: Sat, 17 Mar 2018 23:30:09 +0200
Subject: [PATCH] feat: add nameVerFromPkgSnapshot()

---
 README.md                      |  2 ++
 src/index.ts                   |  2 ++
 src/nameVerFromPkgSnapshot.ts  | 21 +++++++++++++++++++++
 test/index.ts                  |  1 +
 test/nameVerFromPkgSnapshot.ts | 19 +++++++++++++++++++
 5 files changed, 45 insertions(+)
 create mode 100644 src/nameVerFromPkgSnapshot.ts
 create mode 100644 test/nameVerFromPkgSnapshot.ts

diff --git a/README.md b/README.md
index f021ef27de..94676641c9 100644
--- a/README.md
+++ b/README.md
@@ -55,6 +55,8 @@ Writes the current shrinkwrap file only. Fails if there is no `node_modules` dir
 
 Prunes a shrinkwrap file. Prunning means removing packages that are not referenced.
 
+### `nameVerFromPkgSnapshot(relDepPath, pkgSnapshot): {name: string, version: string}`
+
 ## License
 
 [MIT](LICENSE)
diff --git a/src/index.ts b/src/index.ts
index 93a0635e59..d69bdfdcf3 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -3,6 +3,7 @@ export * from './read'
 export * from './types'
 
 import existsWanted from './existsWanted'
+import nameVerFromPkgSnapshot from './nameVerFromPkgSnapshot'
 import prune from './prune'
 import write, {
   writeCurrentOnly,
@@ -11,6 +12,7 @@ import write, {
 
 export {
   existsWanted,
+  nameVerFromPkgSnapshot,
   prune,
   write,
   writeWantedOnly,
diff --git a/src/nameVerFromPkgSnapshot.ts b/src/nameVerFromPkgSnapshot.ts
new file mode 100644
index 0000000000..8425e3c036
--- /dev/null
+++ b/src/nameVerFromPkgSnapshot.ts
@@ -0,0 +1,21 @@
+import * as dp from 'dependency-path'
+import {PackageSnapshot} from './types'
+
+export default (
+  relDepPath: string,
+  pkgSnapshot: PackageSnapshot,
+) => {
+  if (!pkgSnapshot.name) {
+    const pkgInfo = dp.parse(relDepPath)
+    return {
+      // tslint:disable:no-string-literal
+      name: pkgInfo['name'],
+      version: pkgInfo['version'],
+      // tslint:enable:no-string-literal
+    }
+  }
+  return {
+    name: pkgSnapshot.name,
+    version: pkgSnapshot.version,
+  }
+}
diff --git a/test/index.ts b/test/index.ts
index b7985f4592..094562f406 100644
--- a/test/index.ts
+++ b/test/index.ts
@@ -1,2 +1,3 @@
 import './prune'
 import './read'
+import './nameVerFromPkgSnapshot'
diff --git a/test/nameVerFromPkgSnapshot.ts b/test/nameVerFromPkgSnapshot.ts
new file mode 100644
index 0000000000..148bf7a9f4
--- /dev/null
+++ b/test/nameVerFromPkgSnapshot.ts
@@ -0,0 +1,19 @@
+import {nameVerFromPkgSnapshot} from 'pnpm-shrinkwrap'
+import test = require('tape')
+
+test('nameVerFromPkgSnapshot()', (t) => {
+  t.deepEqual(nameVerFromPkgSnapshot('/some-weird-path', {
+    name: 'foo',
+    version: '1.0.0',
+  }), {
+    name: 'foo',
+    version: '1.0.0',
+  })
+
+  t.deepEqual(nameVerFromPkgSnapshot('/foo/1.0.0', {}), {
+    name: 'foo',
+    version: '1.0.0',
+  })
+
+  t.end()
+})