feat: support partial clone on Git repository

README.adoc

@@ -16,7 +16,7 @@ You can also list local repositories (+ghq list+).
 == SYNOPSIS
 
 [verse]
-ghq get [-u] [-p] [--shallow] [--vcs <vcs>] [--look] [--silent] [--branch] [--no-recursive] [--bare] <repository URL>|<host>/<user>/<project>|<user>/<project>|<project>
+ghq get [-u] [-p] [--shallow] [--vcs <vcs>] [--look] [--silent] [--branch] [--no-recursive] [--bare] [--partial blobless|treeless] <repository URL>|<host>/<user>/<project>|<user>/<project>|<project>
 ghq list [-p] [-e] [<query>]
 ghq create [--vcs <vcs>] <repository URL>|<host>/<user>/<project>|<user>/<project>|<project>
 ghq rm [--dry-run] <repository URL>|<host>/<user>/<project>|<user>/<project>|<project>
@@ -44,7 +44,10 @@ get::
     The 'ghq' gets the git repository recursively by default. +
     We can prevent it with '--no-recursive' option.
     With '--bare' option, a "bare clone" will be performed (for Git
-    repositories only, 'git clone --bare ...' eg.).
+    repositories only, 'git clone --bare ...' eg.). +
+    With '--partial' option, a "partial clone" will be performed (for Git
+    repositories only, in 'blobless' mode, 'git clone --filter=blob:none ...',
+    in 'treeless' mode, 'git clone --filter=tree:0 ...' eg.).
 
 list::
     List locally cloned repositories. If a query argument is given, only

cmd_get.go

@@ -35,6 +35,7 @@ func doGet(c *cli.Context) error {
 		branch:    c.String("branch"),
 		recursive: !c.Bool("no-recursive"),
 		bare:      c.Bool("bare"),
+		partial:   c.String("partial"),
 	}
 	if parallel {
 		// force silent in parallel import

cmd_get_test.go

@@ -248,6 +248,52 @@ func TestCommandGet(t *testing.T) {
 				t.Errorf("silent mode should not output any logs, but got: %s", out)
 			}
 		},
+	}, {
+		name: "[partial] blobless",
+		scenario: func(t *testing.T, tmpRoot string, cloneArgs *_cloneArgs, updateArgs *_updateArgs) {
+			localDir := filepath.Join(tmpRoot, "github.com", "motemen", "ghq-test-repo")
+
+			app.Run([]string{"", "get", "--partial", "blobless", "motemen/ghq-test-repo"})
+
+			expect := "https://github.com/motemen/ghq-test-repo"
+			if cloneArgs.remote.String() != expect {
+				t.Errorf("got: %s, expect: %s", cloneArgs.remote, expect)
+			}
+			if filepath.ToSlash(cloneArgs.local) != filepath.ToSlash(localDir) {
+				t.Errorf("got: %s, expect: %s", filepath.ToSlash(cloneArgs.local), filepath.ToSlash(localDir))
+			}
+			if cloneArgs.partial != "blobless" {
+				t.Errorf("cloneArgs.partial should be \"blobless\"")
+			}
+		},
+	}, {
+		name: "[partial] treeless",
+		scenario: func(t *testing.T, tmpRoot string, cloneArgs *_cloneArgs, updateArgs *_updateArgs) {
+			localDir := filepath.Join(tmpRoot, "github.com", "motemen", "ghq-test-repo")
+
+			app.Run([]string{"", "get", "--partial", "treeless", "motemen/ghq-test-repo"})
+
+			expect := "https://github.com/motemen/ghq-test-repo"
+			if cloneArgs.remote.String() != expect {
+				t.Errorf("got: %s, expect: %s", cloneArgs.remote, expect)
+			}
+			if filepath.ToSlash(cloneArgs.local) != filepath.ToSlash(localDir) {
+				t.Errorf("got: %s, expect: %s", filepath.ToSlash(cloneArgs.local), filepath.ToSlash(localDir))
+			}
+			if cloneArgs.partial != "treeless" {
+				t.Errorf("cloneArgs.partial should be \"treeless\"")
+			}
+		},
+	}, {
+		name: "[partial] unacceptable value",
+		scenario: func(t *testing.T, tmpRoot string, cloneArgs *_cloneArgs, updateArgs *_updateArgs) {
+			err := app.Run([]string{"", "get", "--partial", "unacceptable", "motemen/ghq-test-repo"})
+
+			expect := "flag partial value \"unacceptable\" is not allowed"
+			if err.Error() != expect {
+				t.Errorf("got: %s, expect: %s", err.Error(), expect)
+			}
+		},
 	}}
 
 	for _, tc := range testCases {

commands.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"slices"
 	"strings"
 
 	"github.com/urfave/cli/v2"
@@ -38,6 +39,16 @@ var commandGet = &cli.Command{
 			Usage: "Specify `branch` name. This flag implies --single-branch on Git"},
 		&cli.BoolFlag{Name: "parallel", Aliases: []string{"P"}, Usage: "Import parallelly"},
 		&cli.BoolFlag{Name: "bare", Usage: "Do a bare clone"},
+		&cli.StringFlag{
+			Name:  "partial",
+			Usage: "Do a partial clone. Can specify either \"blobless\" or \"treeless\"",
+			Action: func(ctx *cli.Context, v string) error {
+				expected := []string{"blobless", "treeless"}
+				if !slices.Contains(expected, v) {
+					return fmt.Errorf("flag partial value \"%v\" is not allowed", v)
+				}
+				return nil
+			}},
 	},
 }
 
@@ -94,7 +105,7 @@ type commandDoc struct {
 }
 
 var commandDocs = map[string]commandDoc{
-	"get":    {"", "[-u] [-p] [--shallow] [--vcs <vcs>] [--look] [--silent] [--branch <branch>] [--no-recursive] [--bare] <repository URL>|<project>|<user>/<project>|<host>/<user>/<project>"},
+	"get":    {"", "[-u] [-p] [--shallow] [--vcs <vcs>] [--look] [--silent] [--branch <branch>] [--no-recursive] [--bare] [--partial blobless|treeless] <repository URL>|<project>|<user>/<project>|<host>/<user>/<project>"},
 	"list":   {"", "[-p] [-e] [<query>]"},
 	"create": {"", "<project>|<user>/<project>|<host>/<user>/<project>"},
 	"rm":     {"", "<project>|<user>/<project>|<host>/<user>/<project>"},

commands_test.go

@@ -15,6 +15,7 @@ type _cloneArgs struct {
 	recursive bool
 	bare      bool
 	silent    bool
+	partial   string
 }
 
 type _updateArgs struct {
@@ -41,6 +42,7 @@ func withFakeGitBackend(t *testing.T, block func(*testing.T, string, *_cloneArgs
 				recursive: vg.recursive,
 				bare:      vg.bare,
 				silent:    vg.silent,
+				partial:   vg.partial,
 			}
 			return nil
 		},

getter.go

@@ -25,7 +25,7 @@ type getInfo struct {
 
 type getter struct {
 	update, shallow, silent, ssh, recursive, bare bool
-	vcs, branch                                   string
+	vcs, branch, partial                          string
 }
 
 func (g *getter) get(argURL string) (getInfo, error) {
@@ -113,6 +113,7 @@ func (g *getter) getRemoteRepository(remote RemoteRepository, branch string) (ge
 					branch:    branch,
 					recursive: g.recursive,
 					bare:      g.bare,
+					partial:   g.partial,
 				})
 		}
 		return info, nil

misc/author/integration_test.sh

@@ -24,6 +24,8 @@ export GHQ_ROOT=$tmpdir
     ghq get https://svn.apache.org/repos/asf/subversion
     ghq get --shallow hub.darcs.net/byorgey/split
     ghq get --bare x-motemen/gore
+    ghq get --partial blobless x-motemen/blogsync
+    ghq get --partial treeless x-motemen/gobump
 
     test -d $tmpdir/github.com/x-motemen/ghq/.git
     test -d $tmpdir/www.mercurial-scm.org/repo/hello/.hg
@@ -34,11 +36,15 @@ export GHQ_ROOT=$tmpdir
     test -d $tmpdir/svn.apache.org/repos/asf/subversion/.svn
     test -d $tmpdir/hub.darcs.net/byorgey/split/_darcs
     test -d $tmpdir/github.com/x-motemen/gore.git/refs
+    grep --quiet "partialclonefilter = blob:none" $tmpdir/github.com/x-motemen/blogsync/.git/config
+    grep --quiet "partialclonefilter = tree:0" $tmpdir/github.com/x-motemen/gobump/.git/config
 
 : testing 'ghq list'
     cat <<EOF | sort > $tmpdir/expect
 chiselapp.com/user/sti/repository/fossil-gui
+github.com/x-motemen/blogsync
 github.com/x-motemen/ghq
+github.com/x-motemen/gobump
 github.com/x-motemen/gore.git
 www.mercurial-scm.org/repo/hello
 launchpad.net/shutter

misc/fish/ghq.fish

@@ -36,6 +36,11 @@ complete -c ghq -n '__fish_seen_subcommand_from get' -l no-recursive -d 'Prevent
 complete -c ghq -n '__fish_seen_subcommand_from get' -s b -l branch -d 'Specify branch name. This flag implies --single-branch on Git'
 complete -c ghq -n '__fish_seen_subcommand_from get' -s P -l parallel -d 'Import parallelly'
 complete -c ghq -n '__fish_seen_subcommand_from get' -l bare -d 'Do a bare clone'
+function __complete_get_partial
+    printf '%s\t%s\n' 'blobless' 'Do a blobless clone'
+    printf '%s\t%s\n' 'treeless' 'Do a treeless clone'
+end
+complete -c ghq -n '__fish_seen_subcommand_from get' -l partial -d 'Do a partial clone' -xa '(__complete_get_partial)'
 
 complete -c ghq -n '__fish_seen_subcommand_from list' -s e -l exact -d 'Perform an exact match'
 complete -c ghq -n '__fish_seen_subcommand_from list' -l vcs -d 'Specify vcs backend for matching'

misc/zsh/_ghq

@@ -27,6 +27,7 @@ function _ghq () {
                         '--bare[Do a bare clone]' \
                         '(-b --branch)'{-b,--branch}'[Specify branch name]' \
                         '(-P --parallel)'{-P,--parallel}'[Import parallelly]' \
+                        '--partial[Do a partial clone]: :(blobless treeless)' \
                         '(-)*:: :->null_state' \
                         && ret=0
                     ;;

vcs.go

@@ -44,7 +44,7 @@ type vcsGetOption struct {
 	url                              *url.URL
 	dir                              string
 	recursive, shallow, silent, bare bool
-	branch                           string
+	branch, partial                  string
 }
 
 // GitBackend is the VCSBackend of git
@@ -70,6 +70,11 @@ var GitBackend = &VCSBackend{
 		if vg.bare {
 			args = append(args, "--bare")
 		}
+		if vg.partial == "blobless" {
+			args = append(args, "--filter=blob:none")
+		} else if vg.partial == "treeless" {
+			args = append(args, "--filter=tree:0")
+		}
 		args = append(args, vg.url.String(), vg.dir)
 
 		return run(vg.silent)("git", args...)

vcs_test.go

@@ -136,6 +136,26 @@ func TestVCSBackend(t *testing.T) {
 			})
 		},
 		expect: []string{"git", "clone", "--bare", remoteDummyURL.String(), localDir},
+	}, {
+		name: "[git] (partial) blobless clone",
+		f: func() error {
+			return GitBackend.Clone(&vcsGetOption{
+				url:     remoteDummyURL,
+				dir:     localDir,
+				partial: "blobless",
+			})
+		},
+		expect: []string{"git", "clone", "--filter=blob:none", remoteDummyURL.String(), localDir},
+	}, {
+		name: "[git] (partial) treeless clone",
+		f: func() error {
+			return GitBackend.Clone(&vcsGetOption{
+				url:     remoteDummyURL,
+				dir:     localDir,
+				partial: "treeless",
+			})
+		},
+		expect: []string{"git", "clone", "--filter=tree:0", remoteDummyURL.String(), localDir},
 	}, {
 		name: "[git] switch git-svn on update",
 		f: func() error {