feat(staged-dockerfile): implement global/Run mounts

Signed-off-by: Ilya Lesikov <ilya@lesikov.com>

cmd/buildah-test/main.go

@@ -47,7 +47,7 @@ echo STOP
 	defer os.RemoveAll("/tmp/build_stage.sh")
 
 	if err := b.RunCommand(ctx, "mycontainer", []string{"/.werf/build_stage.sh"}, buildah.RunCommandOpts{
-		LegacyMounts: []specs.Mount{
+		GlobalMounts: []*specs.Mount{
 			{
 				Type:        "bind",
 				Source:      "/tmp/build_stage.sh",

pkg/build/image/build_context_archive.go

@@ -138,15 +138,15 @@ func (a *BuildContextArchive) CalculateGlobsChecksum(ctx context.Context, globs
 		}
 	}
 
-	pathsChecksum, err := a.calculatePathsChecksum(ctx, matches)
+	pathsChecksum, err := a.CalculatePathsChecksum(ctx, matches)
 	if err != nil {
 		return "", fmt.Errorf("unable to calculate build context paths checksum: %w", err)
 	}
 
 	return pathsChecksum, nil
 }
 
-func (a *BuildContextArchive) calculatePathsChecksum(ctx context.Context, paths []string) (string, error) {
+func (a *BuildContextArchive) CalculatePathsChecksum(ctx context.Context, paths []string) (string, error) {
 	sort.Strings(paths)
 	paths = util.UniqStrings(paths)
 

pkg/build/stage/instruction/run.go

@@ -61,7 +61,23 @@ func (stg *Run) GetDependencies(ctx context.Context, c stage.Conveyor, cb contai
 		}
 	}
 
-	// TODO(ilya-lesikov): should bind mount with context as src be counted as dependency?
+	if stg.UsesBuildContext() {
+		var paths []string
+		for _, mnt := range mounts {
+			if mnt.Type != instructions.MountTypeBind || mnt.Source == "" {
+				continue
+			}
+			paths = append(paths, mnt.Source)
+		}
+
+		if len(paths) > 0 {
+			if srcChecksum, err := buildContextArchive.CalculatePathsChecksum(ctx, paths); err != nil {
+				return "", fmt.Errorf("unable to calculate build context paths checksum: %w", err)
+			} else {
+				args = append(args, "SourcesChecksum", srcChecksum)
+			}
+		}
+	}
 
 	return util.Sha256Hash(args...), nil
 }

pkg/build/stage/instruction/stubs_test.go

@@ -101,3 +101,18 @@ func (buildContext *BuildContextStub) CalculateGlobsChecksum(ctx context.Context
 
 	return util.Sha256Hash(args...), nil
 }
+
+func (buildContext *BuildContextStub) CalculatePathsChecksum(ctx context.Context, paths []string) (string, error) {
+	var args []string
+
+	for _, p := range paths {
+		for _, f := range buildContext.Files {
+			if f.Name == p {
+				args = append(args, string(f.Data))
+				break
+			}
+		}
+	}
+
+	return util.Sha256Hash(args...), nil
+}

pkg/buildah/common.go

@@ -70,8 +70,10 @@ type RunCommandOpts struct {
 	WorkingDir       string
 	User             string
 	Envs             []string
-	Mounts           []instructions.Mount
-	LegacyMounts     []specs.Mount // TODO(ilya-lesikov): migrate to Mounts
+	// Mounts as allowed to be passed from command line.
+	GlobalMounts []*specs.Mount
+	// Mounts as allowed in Dockerfile RUN --mount option. Have more restrictions than GlobalMounts (e.g. Source of bind-mount can't be outside of ContextDir or container root).
+	RunMounts []*instructions.Mount
 }
 
 type RmiOpts struct {