fix handling of injected dependencies for pnpm prune

cli/internal/lockfile/pnpm_lockfile.go

@@ -35,6 +35,20 @@ type ProjectSnapshot struct {
 	PublishDirectory     string                      `yaml:"publishDirectory,omitempty"`
 }
 
+// Will try to find a resolution in any of the dependency fields
+func (p *ProjectSnapshot) findResolution(dependency string) (string, bool) {
+	if resolution, ok := p.Dependencies[dependency]; ok {
+		return resolution, true
+	}
+	if resolution, ok := p.DevDependencies[dependency]; ok {
+		return resolution, true
+	}
+	if resolution, ok := p.OptionalDependencies[dependency]; ok {
+		return resolution, true
+	}
+	return "", false
+}
+
 // PackageSnapshot Snapshot used to represent a package in the packages setion
 type PackageSnapshot struct {
 	Resolution PackageResolution `yaml:"resolution,flow"`
@@ -184,6 +198,23 @@ func (p *PnpmLockfile) Subgraph(workspacePackages []turbopath.AnchoredSystemPath
 		return nil, err
 	}
 
+	for _, importer := range importers {
+		for dependency, meta := range importer.DependenciesMeta {
+			if meta.Injected {
+				resolution, ok := importer.findResolution(dependency)
+				if !ok {
+					return nil, fmt.Errorf("Unable to find %s other than reference in dependenciesMeta", dependency)
+				}
+				entry, ok := p.Packages[resolution]
+				if !ok {
+					return nil, fmt.Errorf("Unable to find package entry for %s", resolution)
+				}
+
+				lockfilePackages[resolution] = entry
+			}
+		}
+	}
+
 	lockfile := PnpmLockfile{
 		Version:                   p.Version,
 		Importers:                 importers,

cli/internal/lockfile/pnpm_lockfile_test.go

@@ -91,3 +91,25 @@ func Test_SpecifierResolution(t *testing.T) {
 		}
 	}
 }
+
+func Test_SubgraphInjectedPackages(t *testing.T) {
+	contents, err := getFixture(t, "pnpm7-workspace.yaml")
+	if err != nil {
+		t.Error(err)
+	}
+	lockfile, err := DecodePnpmLockfile(contents)
+	assert.NilError(t, err, "decode lockfile")
+
+	packageWithInjectedPackage := turbopath.AnchoredUnixPath("apps/docs").ToSystemPath()
+
+	prunedLockfile, err := lockfile.Subgraph([]turbopath.AnchoredSystemPath{packageWithInjectedPackage}, []string{})
+	assert.NilError(t, err, "prune lockfile")
+
+	pnpmLockfile, ok := prunedLockfile.(*PnpmLockfile)
+	assert.Assert(t, ok, "got different lockfile impl")
+
+	_, hasInjectedPackage := pnpmLockfile.Packages["file:packages/ui"]
+
+	assert.Assert(t, hasInjectedPackage, "pruned lockfile is missing injected package")
+
+}

cli/internal/lockfile/testdata/pnpm7-workspace.yaml

@@ -39,7 +39,7 @@ importers:
       next: 12.2.5_ir3quccc6i62x6qn6jjhyjjiey
       react: 18.2.0
       react-dom: 18.2.0_react@18.2.0
-      ui: link:../../packages/ui
+      ui: file:packages/ui
       underscore: 1.13.4_3pbfs36izefyn2uycmknwkvuuy
     devDependencies:
       '@babel/core': 7.19.1
@@ -50,6 +50,9 @@ importers:
       next-transpile-modules: 9.0.0
       tsconfig: link:../../packages/tsconfig
       typescript: 4.8.3
+    dependenciesMeta:
+      ui:
+        injected: true
 
   apps/web:
     specifiers:
@@ -2444,3 +2447,9 @@ packages:
 
   /yallist/4.0.0:
     resolution: {integrity: sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==}
+
+  file:packages/ui:
+    resolution: {directory: packages/ui, type: directory}
+    name: ui
+    version: 0.0.0
+    dev: false