Add input parameter filter for git commands

CHANGELOG.md

@@ -2,7 +2,8 @@
 
 ## [Unreleased]
 
-- No changes yet.
+- Add input parameter `filter` for use with git inputs. This sets the filter
+  flag argument for the git fetch command.
 
 ## [v1.49.0] - 2025-01-07
 

private/buf/buffetch/internal/git_ref.go

@@ -42,6 +42,7 @@ type gitRef struct {
 	depth             uint32
 	recurseSubmodules bool
 	subDirPath        string
+	filter            string
 }
 
 func newGitRef(
@@ -51,6 +52,7 @@ func newGitRef(
 	depth uint32,
 	recurseSubmodules bool,
 	subDirPath string,
+	filter string,
 ) (*gitRef, error) {
 	gitScheme, path, err := getGitSchemeAndPath(format, path)
 	if err != nil {
@@ -74,6 +76,7 @@ func newGitRef(
 		recurseSubmodules,
 		depth,
 		subDirPath,
+		filter,
 	), nil
 }
 
@@ -85,6 +88,7 @@ func newDirectGitRef(
 	recurseSubmodules bool,
 	depth uint32,
 	subDirPath string,
+	filter string,
 ) *gitRef {
 	return &gitRef{
 		format:            format,
@@ -94,6 +98,7 @@ func newDirectGitRef(
 		depth:             depth,
 		recurseSubmodules: recurseSubmodules,
 		subDirPath:        subDirPath,
+		filter:            filter,
 	}
 }
 
@@ -125,6 +130,10 @@ func (r *gitRef) SubDirPath() string {
 	return r.subDirPath
 }
 
+func (r *gitRef) Filter() string {
+	return r.filter
+}
+
 func (*gitRef) ref()       {}
 func (*gitRef) bucketRef() {}
 func (*gitRef) gitRef()    {}

private/buf/buffetch/internal/internal.go

@@ -207,6 +207,8 @@ type GitRef interface {
 	RecurseSubmodules() bool
 	// Will be empty instead of "." for root directory
 	SubDirPath() string
+	// Filter spec to use, see the --filter option in git rev-list.
+	Filter() string
 	gitRef()
 }
 
@@ -217,8 +219,9 @@ func NewGitRef(
 	depth uint32,
 	recurseSubmodules bool,
 	subDirPath string,
+	filter string,
 ) (GitRef, error) {
-	return newGitRef("", path, gitName, depth, recurseSubmodules, subDirPath)
+	return newGitRef("", path, gitName, depth, recurseSubmodules, subDirPath, filter)
 }
 
 // ModuleRef is a module reference.
@@ -353,6 +356,7 @@ func NewDirectParsedGitRef(
 	recurseSubmodules bool,
 	depth uint32,
 	subDirPath string,
+	filter string,
 ) ParsedGitRef {
 	return newDirectGitRef(
 		format,
@@ -362,6 +366,7 @@ func NewDirectParsedGitRef(
 		recurseSubmodules,
 		depth,
 		subDirPath,
+		filter,
 	)
 }
 
@@ -557,6 +562,9 @@ type RawRef struct {
 	// requested GitRef will be included when cloning the requested branch
 	// (or the repo's default branch if GitBranch is empty).
 	GitDepth uint32
+	// Only set for git formats.
+	// The filter spec to use, see the --filter option in git rev-list.
+	GitFilter string
 	// Only set for archive formats.
 	ArchiveStripComponents uint32
 	// Only set for proto file ref format.

private/buf/buffetch/internal/reader.go

@@ -370,6 +370,8 @@ func (r *reader) getGitBucket(
 		git.CloneToBucketOptions{
 			Name:              gitRef.GitName(),
 			RecurseSubmodules: gitRef.RecurseSubmodules(),
+			SubDir:            gitRef.SubDirPath(),
+			Filter:            gitRef.Filter(),
 		},
 	); err != nil {
 		return nil, nil, fmt.Errorf("could not clone %s: %v", gitURL, err)

private/buf/buffetch/internal/ref_parser.go

@@ -142,6 +142,8 @@ func (a *refParser) getRawRef(
 			rawRef.GitCommitOrTag = value
 		case "ref":
 			rawRef.GitRef = value
+		case "filter":
+			rawRef.GitFilter = value
 		case "depth":
 			depth, err := parseGitDepth(value)
 			if err != nil {
@@ -519,6 +521,7 @@ func getGitRef(
 		rawRef.GitDepth,
 		rawRef.GitRecurseSubmodules,
 		rawRef.SubDirPath,
+		rawRef.GitFilter,
 	)
 }
 

private/buf/buffetch/ref_parser_test.go

@@ -257,6 +257,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			1,
 			"",
+			"",
 		),
 		"path/to/dir.git",
 	)
@@ -270,6 +271,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			40,
 			"",
+			"",
 		),
 		"path/to/dir.git#depth=40",
 	)
@@ -283,6 +285,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			1,
 			"",
+			"",
 		),
 		"path/to/dir.git#branch=main",
 	)
@@ -296,6 +299,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			1,
 			"",
+			"",
 		),
 		"file:///path/to/dir.git#branch=main",
 	)
@@ -309,6 +313,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			1,
 			"",
+			"",
 		),
 		"path/to/dir.git#tag=v1.0.0",
 	)
@@ -322,6 +327,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			1,
 			"",
+			"",
 		),
 		"http://hello.com/path/to/dir.git#branch=main",
 	)
@@ -335,6 +341,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			1,
 			"",
+			"",
 		),
 		"https://hello.com/path/to/dir.git#branch=main",
 	)
@@ -348,6 +355,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			1,
 			"",
+			"",
 		),
 		"ssh://user@hello.com:path/to/dir.git#branch=main",
 	)
@@ -361,6 +369,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			50,
 			"",
+			"",
 		),
 		"ssh://user@hello.com:path/to/dir.git#ref=refs/remotes/origin/HEAD",
 	)
@@ -374,6 +383,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			50,
 			"",
+			"",
 		),
 		"ssh://user@hello.com:path/to/dir.git#ref=refs/remotes/origin/HEAD,branch=main",
 	)
@@ -387,6 +397,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			10,
 			"",
+			"",
 		),
 		"ssh://user@hello.com:path/to/dir.git#ref=refs/remotes/origin/HEAD,depth=10",
 	)
@@ -400,6 +411,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			10,
 			"",
+			"",
 		),
 		"ssh://user@hello.com:path/to/dir.git#ref=refs/remotes/origin/HEAD,branch=main,depth=10",
 	)
@@ -413,6 +425,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			1,
 			"foo/bar",
+			"",
 		),
 		"path/to/dir.git#subdir=foo/bar",
 	)
@@ -426,6 +439,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			1,
 			"",
+			"",
 		),
 		"path/to/dir.git#subdir=.",
 	)
@@ -439,6 +453,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			1,
 			"",
+			"",
 		),
 		"path/to/dir.git#subdir=foo/..",
 	)
@@ -452,6 +467,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			1,
 			"",
+			"",
 		),
 		"git://user@hello.com:path/to/dir.git#branch=main",
 	)
@@ -465,9 +481,24 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			1,
 			"",
+			"",
 		),
 		"git://path/to/dir.git#branch=main",
 	)
+	testGetParsedRefSuccess(
+		t,
+		internal.NewDirectParsedGitRef(
+			formatGit,
+			"path/to/dir.git",
+			internal.GitSchemeGit,
+			git.NewBranchName("main"),
+			false,
+			1,
+			"subdir",
+			"tree:0",
+		),
+		"git://path/to/dir.git#branch=main,filter=tree:0,subdir=subdir",
+	)
 	testGetParsedRefSuccess(
 		t,
 		internal.NewDirectParsedSingleRef(
@@ -811,6 +842,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			1,
 			"",
+			"",
 		),
 		"/path/to/dir#branch=main,format=git",
 	)
@@ -824,6 +856,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			1,
 			"",
+			"",
 		),
 		"/path/to/dir#format=git,branch=main/foo",
 	)
@@ -837,6 +870,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			1,
 			"",
+			"",
 		),
 		"path/to/dir#tag=main/foo,format=git",
 	)
@@ -850,6 +884,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			1,
 			"",
+			"",
 		),
 		"path/to/dir#format=git,tag=main/foo",
 	)
@@ -863,6 +898,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			true,
 			1,
 			"",
+			"",
 		),
 		"path/to/dir#format=git,tag=main/foo,recurse_submodules=true",
 	)
@@ -876,6 +912,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			1,
 			"",
+			"",
 		),
 		"path/to/dir#format=git,tag=main/foo,recurse_submodules=false",
 	)
@@ -889,6 +926,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			50,
 			"",
+			"",
 		),
 		"path/to/dir#format=git,ref=refs/remotes/origin/HEAD",
 	)
@@ -902,6 +940,7 @@ func TestGetParsedRefSuccess(t *testing.T) {
 			false,
 			10,
 			"",
+			"",
 		),
 		"path/to/dir#format=git,ref=refs/remotes/origin/HEAD,depth=10",
 	)