feat: print an info message about dependencies that were not built (#7854)

close #7815

.changeset/brave-sheep-dress.md

@@ -0,0 +1,6 @@
+---
+"@pnpm/build-modules": minor
+"pnpm": minor
+---
+
+Print an info message about dependencies that were not built [#7815](https://github.com/pnpm/pnpm/issues/7815).

exec/build-modules/src/index.ts

@@ -56,7 +56,14 @@ export async function buildModules (
     warn,
   }
   const chunks = buildSequence(depGraph, rootDepPaths)
-  const allowBuild = opts.allowBuild ?? (() => true)
+  const ignoredPkgs = new Set<string>()
+  const allowBuild = opts.allowBuild
+    ? (pkgName: string) => {
+      if (opts.allowBuild!(pkgName)) return true
+      ignoredPkgs.add(pkgName)
+      return false
+    }
+    : () => true
   const groups = chunks.map((chunk) => {
     chunk = chunk.filter((depPath) => {
       const node = depGraph[depPath]
@@ -76,6 +83,10 @@ export async function buildModules (
     )
   })
   await runGroups(opts.childConcurrency ?? 4, groups)
+  logger.info({
+    message: `The following dependencies have build scripts that were ignored: ${Array.from(ignoredPkgs).sort().join(', ')}`,
+    prefix: opts.lockfileDir,
+  })
 }
 
 async function buildDependency (