Marks all workspace files as group read-write on live reload enabled (#…

…162)

distzip/build.go

@@ -18,6 +18,9 @@ package distzip
 
 import (
 	"fmt"
+	"io/fs"
+	"os"
+	"path/filepath"
 
 	"github.com/paketo-buildpacks/libpak/effect"
 	"github.com/paketo-buildpacks/libpak/sbom"
@@ -84,6 +87,20 @@ func (b Build) Build(context libcnb.BuildContext) (libcnb.BuildResult, error) {
 				Default:   true,
 			},
 		)
+
+		err = filepath.Walk(context.Application.Path, func(path string, info fs.FileInfo, err error) error {
+			if err != nil {
+				return err
+			}
+			if path == context.Application.Path {
+				return nil
+			}
+
+			return os.Chmod(path, info.Mode()|0060)
+		})
+		if err != nil {
+			return libcnb.BuildResult{}, fmt.Errorf("unable to mark files as group read-write for live reload\n%w", err)
+		}
 	}
 
 	if b.SBOMScanner == nil {

distzip/build_test.go

@@ -17,6 +17,8 @@
 package distzip_test
 
 import (
+	"fmt"
+	"io/fs"
 	"io/ioutil"
 	"os"
 	"path/filepath"
@@ -105,6 +107,34 @@ func testBuild(t *testing.T, context spec.G, it spec.S) {
 				))
 				sbomScanner.AssertCalled(t, "ScanLaunch", ctx.Application.Path, libcnb.SyftJSON, libcnb.CycloneDXJSON)
 			})
+
+			it("marks all workspace files as group read-write", func() {
+				_, err := distzip.Build{SBOMScanner: &sbomScanner}.Build(ctx)
+				Expect(err).NotTo(HaveOccurred())
+
+				var modes []string
+				err = filepath.Walk(ctx.Application.Path, func(path string, info fs.FileInfo, err error) error {
+					if err != nil {
+						return err
+					}
+					if path != ctx.Application.Path {
+						rel, err := filepath.Rel(ctx.Application.Path, path)
+						if err != nil {
+							return err
+						}
+						modes = append(modes, fmt.Sprintf("%s %s", info.Mode(), rel))
+					}
+
+					return nil
+				})
+				Expect(err).NotTo(HaveOccurred())
+
+				Expect(modes).To(ConsistOf(
+					"drwxrwxr-x app",
+					"drwxrwxr-x app/bin",
+					"-rwxrwxr-x app/bin/test-script",
+				))
+			})
 		})
 	})