feat: add updated: boolean to PackageResponse.body

The new field is true when the package's resolution has been
updated.

ref pnpm/pnpm#1054

src/packageRequester.ts

@@ -47,6 +47,7 @@ export type PackageResponse = {
     manifest: PackageManifest
     id: string,
     normalizedPref?: string,
+    updated: boolean,
   },
 } | (
   {
@@ -63,6 +64,7 @@ export type PackageResponse = {
       // resolved package, it is out-of-date.
       latest?: string,
       normalizedPref?: string,
+      updated: boolean,
     },
   } & (
     {
@@ -70,6 +72,7 @@ export type PackageResponse = {
     } | {
       body: {
         manifest: PackageManifest,
+        updated: boolean,
       },
     }
   )
@@ -182,6 +185,7 @@ async function resolveAndFetch (
     let pkgId = options.currentPkgId
     const skipResolution = resolution && !options.update
     let forceFetch = false
+    let updated = false
 
     // When fetching is skipped, resolution cannot be skipped.
     // We need the package's manifest when doing `shrinkwrap-only` installs.
@@ -208,9 +212,10 @@ async function resolveAndFetch (
       )
 
       if (!skipResolution || forceFetch) {
+        updated = pkgId !== resolveResult.id || !resolution || forceFetch
         // Keep the shrinkwrap resolution when possible
         // to keep the original shasum.
-        if (pkgId !== resolveResult.id || !resolution || forceFetch) {
+        if (updated) {
           resolution = resolveResult.resolution
         }
         pkgId = resolveResult.id
@@ -234,6 +239,7 @@ async function resolveAndFetch (
           manifest: pkg,
           normalizedPref,
           resolution: resolution as DirectoryResolution,
+          updated,
         },
       }
     }
@@ -254,6 +260,7 @@ async function resolveAndFetch (
           manifest: pkg,
           normalizedPref,
           resolution,
+          updated,
         },
       }
     }
@@ -286,6 +293,7 @@ async function resolveAndFetch (
           manifest: pkg,
           normalizedPref,
           resolution,
+          updated,
         },
         fetchingFiles: ctx.fetchingLocker[id].fetchingFiles,
         finishing: ctx.fetchingLocker[id].finishing,
@@ -300,6 +308,7 @@ async function resolveAndFetch (
         latest,
         normalizedPref,
         resolution,
+        updated,
       },
       fetchingFiles: ctx.fetchingLocker[id].fetchingFiles,
       fetchingManifest: ctx.fetchingLocker[id].fetchingManifest as Promise<PackageManifest>,

test/index.ts

@@ -188,6 +188,7 @@ test('refetch local tarball if its integrity has changed', async t => {
     await response.fetchingFiles
     await response.finishing
 
+    t.ok(response.body.updated === false, 'resolution not updated')
     t.notOk((await response.fetchingFiles).fromStore, 'unpack tarball if it is not in store yet')
   }
 
@@ -216,6 +217,7 @@ test('refetch local tarball if its integrity has changed', async t => {
     await response.fetchingFiles
     await response.finishing
 
+    t.ok(response.body.updated === true)
     t.notOk((await response.fetchingFiles).fromStore, 're-unpack tarball if its integrity has changed')
   }
 
@@ -244,6 +246,7 @@ test('refetch local tarball if its integrity has changed', async t => {
     await response.fetchingFiles
     await response.finishing
 
+    t.ok(response.body.updated === false)
     t.ok((await response.fetchingFiles).fromStore, 'use existing package from store if integrities matched')
   }