From 69ff89574691391a3fbcb1bfe70eed53ba7b6ccf Mon Sep 17 00:00:00 2001 From: Tom van der Woerdt Date: Wed, 28 Aug 2024 14:10:45 +0200 Subject: [PATCH] git: get info from a 'bare' repo instead For git repositories you basically always pay the storage cost twice: once for the tree in .git, once for the actual files being checked out. Additionally, the tree in .git is compressed, so in many cases it can be smaller than the actual files being checked out. This commit updates Hound to optionally process git files from the actual git files instead of the checked out tree. For me, this saves a significant amount of disk space. Why does it matter? Because I run hound on a laptop instead of a datacenter, and space is limited. It does cost a few more CPU cycles, but that's fine by me. --- go.mod | 28 +++++++++++- go.sum | 109 ++++++++++++++++++++++++++++++++++++++++++++- index/index.go | 2 +- vcs/dir_fs.go | 2 +- vcs/git.go | 41 ++++++++++++----- vcs/git_fs.go | 117 +++++++++++++++++++++++++++++++++++++++++++++++++ vcs/vcs.go | 12 ++++- 7 files changed, 291 insertions(+), 20 deletions(-) create mode 100644 vcs/git_fs.go diff --git a/go.mod b/go.mod index 3d5151e6..87d79ebf 100644 --- a/go.mod +++ b/go.mod @@ -1,8 +1,32 @@ module github.com/hound-search/hound -go 1.16 +go 1.18 require ( github.com/blang/semver/v4 v4.0.0 - golang.org/x/mod v0.10.0 + github.com/go-git/go-git/v5 v5.12.0 + golang.org/x/mod v0.12.0 +) + +require ( + dario.cat/mergo v1.0.0 // indirect + github.com/Microsoft/go-winio v0.6.1 // indirect + github.com/ProtonMail/go-crypto v1.0.0 // indirect + github.com/cloudflare/circl v1.3.7 // indirect + github.com/cyphar/filepath-securejoin v0.2.4 // indirect + github.com/emirpasic/gods v1.18.1 // indirect + github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376 // indirect + github.com/go-git/go-billy/v5 v5.5.0 // indirect + github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect + github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 // indirect + github.com/kevinburke/ssh_config v1.2.0 // indirect + github.com/pjbgf/sha1cd v0.3.0 // indirect + github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3 // indirect + github.com/skeema/knownhosts v1.2.2 // indirect + github.com/xanzy/ssh-agent v0.3.3 // indirect + golang.org/x/crypto v0.21.0 // indirect + golang.org/x/net v0.22.0 // indirect + golang.org/x/sys v0.18.0 // indirect + golang.org/x/tools v0.13.0 // indirect + gopkg.in/warnings.v0 v0.1.2 // indirect ) diff --git a/go.sum b/go.sum index ab72a812..eaef6829 100644 --- a/go.sum +++ b/go.sum @@ -1,27 +1,132 @@ +dario.cat/mergo v1.0.0 h1:AGCNq9Evsj31mOgNPcLyXc+4PNABt905YmuqPYYpBWk= +dario.cat/mergo v1.0.0/go.mod h1:uNxQE+84aUszobStD9th8a29P2fMDhsBdgRYvZOxGmk= +github.com/Microsoft/go-winio v0.5.2/go.mod h1:WpS1mjBmmwHBEWmogvA2mj8546UReBk4v8QkMxJ6pZY= +github.com/Microsoft/go-winio v0.6.1 h1:9/kr64B9VUZrLm5YYwbGtUJnMgqWVOdUAXu6Migciow= +github.com/Microsoft/go-winio v0.6.1/go.mod h1:LRdKpFKfdobln8UmuiYcKPot9D2v6svN5+sAH+4kjUM= +github.com/ProtonMail/go-crypto v1.0.0 h1:LRuvITjQWX+WIfr930YHG2HNfjR1uOfyf5vE0kC2U78= +github.com/ProtonMail/go-crypto v1.0.0/go.mod h1:EjAoLdwvbIOoOQr3ihjnSoLZRtE8azugULFRteWMNc0= +github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be h1:9AeTilPcZAjCFIImctFaOjnTIavg87rW78vTPkQqLI8= +github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5 h1:0CwZNZbxp69SHPdPJAN/hZIm0C4OItdklCFmMRWYpio= github.com/blang/semver/v4 v4.0.0 h1:1PFHFE6yCCTv8C1TeyNNarDzntLi7wMI5i/pzqYIsAM= github.com/blang/semver/v4 v4.0.0/go.mod h1:IbckMUScFkM3pff0VJDNKRiT6TG/YpiHIM2yvyW5YoQ= +github.com/bwesterb/go-ristretto v1.2.3/go.mod h1:fUIoIZaG73pV5biE2Blr2xEzDoMj7NFEuV9ekS419A0= 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golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc= +golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU= +golang.org/x/tools v0.13.0 h1:Iey4qkscZuv0VvIt8E0neZjtPVQFSc870HQ448QgEmQ= +golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58= golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= +gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk= +gopkg.in/warnings.v0 v0.1.2 h1:wFXVbFY8DY5/xOe1ECiWdKCzZlxgshcYVNkBHstARME= +gopkg.in/warnings.v0 v0.1.2/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI= +gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ= +gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= +gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= diff --git a/index/index.go b/index/index.go index e12ab3ec..cff82569 100644 --- a/index/index.go +++ b/index/index.go @@ -370,7 +370,7 @@ func indexAllFiles(opt *IndexOptions, dst string, fs vcs.FileSystem) error { } defer fileHandle.Close() - if err := fs.Walk(func(rel string, info os.FileInfo, err error) error { //nolint + if err := fs.Walk(func(rel string, info vcs.FileInfo, err error) error { //nolint name := info.Name() // Is this file considered "special", this means it's not even a part diff --git a/vcs/dir_fs.go b/vcs/dir_fs.go index 31b7178d..0e800968 100644 --- a/vcs/dir_fs.go +++ b/vcs/dir_fs.go @@ -32,7 +32,7 @@ func (dir *dirFilesystem) Open(name string) (io.ReadCloser, error) { return os.Open(path.Join(dir.dir, name)) } -func (dir *dirFilesystem) Walk(fn filepath.WalkFunc) error { +func (dir *dirFilesystem) Walk(fn FileSystemWalkFunc) error { return filepath.Walk(dir.dir, func(path string, info fs.FileInfo, err error) error { rel, err := filepath.Rel(dir.dir, path) if err != nil { diff --git a/vcs/git.go b/vcs/git.go index 9b9bfb15..7049b0f7 100644 --- a/vcs/git.go +++ b/vcs/git.go @@ -24,6 +24,7 @@ func init() { type GitDriver struct { DetectRef bool `json:"detect-ref"` Ref string `json:"ref"` + Bare bool `json:"bare"` refDetetector refDetetector } @@ -49,10 +50,15 @@ func newGit(b []byte) (Driver, error) { } func (g *GitDriver) HeadRev(dir string) (string, error) { + targetRef := "HEAD" + if g.Bare { + targetRef = fmt.Sprintf("origin/%s", g.targetRef(dir)) + } + cmd := exec.Command( "git", "rev-parse", - "HEAD") + targetRef) cmd.Dir = dir r, err := cmd.StdoutPipe() if err != nil { @@ -102,12 +108,15 @@ func (g *GitDriver) Pull(dir string) (string, error) { return "", err } - if _, err := run("git reset", dir, - "git", - "reset", - "--hard", - fmt.Sprintf("origin/%s", targetRef)); err != nil { - return "", err + if !g.Bare { + // XXX(tvdw) Check if this works without fetch? + if _, err := run("git reset", dir, + "git", + "reset", + "--hard", + fmt.Sprintf("origin/%s", targetRef)); err != nil { + return "", err + } } return g.HeadRev(dir) @@ -130,12 +139,16 @@ func (g *GitDriver) targetRef(dir string) string { func (g *GitDriver) Clone(dir, url string) (string, error) { par, rep := filepath.Split(dir) - cmd := exec.Command( - "git", + + cmdArgs := []string{ "clone", "--depth", "1", - url, - rep) + } + if g.Bare { + cmdArgs = append(cmdArgs, "--bare") + } + cmdArgs = append(cmdArgs, url, rep) + cmd := exec.Command("git", cmdArgs...) cmd.Dir = par out, err := cmd.CombinedOutput() if err != nil { @@ -229,5 +242,9 @@ func (d *headBranchDetector) detectRef(dir string) string { } func (g *GitDriver) FileSystem(dir string) (FileSystem, error) { - return NewDirFilesystem(dir) + if g.Bare { + return NewGitFilesystem(dir, fmt.Sprintf("origin/%s", g.targetRef(dir))) + } else { + return NewDirFilesystem(dir) + } } diff --git a/vcs/git_fs.go b/vcs/git_fs.go new file mode 100644 index 00000000..4808757d --- /dev/null +++ b/vcs/git_fs.go @@ -0,0 +1,117 @@ +package vcs + +import ( + "io" + "io/fs" + "path" + "slices" + + gogit "github.com/go-git/go-git/v5" + "github.com/go-git/go-git/v5/plumbing" + "github.com/go-git/go-git/v5/plumbing/filemode" + "github.com/go-git/go-git/v5/plumbing/object" +) + +type gitFilesystem struct { + repo *gogit.Repository + root *object.Tree +} + +type gitFileinfo struct { + raw *object.File +} + +type gitDirinfo struct { + name string +} + +func NewGitFilesystem(dir, ref string) (FileSystem, error) { + repo, err := gogit.PlainOpen(dir) + if err != nil { + return nil, err + } + + rev, err := repo.ResolveRevision(plumbing.Revision(ref)) + if err != nil { + return nil, err + } + + commit, err := repo.CommitObject(*rev) + if err != nil { + return nil, err + } + + root, err := commit.Tree() + if err != nil { + return nil, err + } + + return &gitFilesystem{ + repo: repo, + root: root, + }, nil +} + +func (fs *gitFilesystem) Open(name string) (io.ReadCloser, error) { + file, err := fs.root.File(name) + if err != nil { + return nil, err + } + return file.Reader() +} + +func (fs *gitFilesystem) Walk(fn FileSystemWalkFunc) error { + seenDirs := make(map[string]interface{}) + + return fs.root.Files().ForEach(func(f *object.File) error { + n := f.Name + var createDirs []string + for n != "" { + n = path.Dir(n) + if _, ok := seenDirs[n]; ok { + break + } + seenDirs[n] = true + createDirs = append(createDirs, n) + } + if len(createDirs) > 0 { + slices.Reverse(createDirs) + for _, createDir := range createDirs { + err := fn(createDir, &gitDirinfo{createDir}, nil) + if err != nil { + return err + } + } + } + + fi := &gitFileinfo{f} + if fi.IsDir() { + seenDirs[f.Name] = true + } + + return fn(f.Name, fi, nil) + }) +} + +func (fi *gitFileinfo) Name() string { + return path.Base(fi.raw.Name) +} + +func (fi *gitFileinfo) IsDir() bool { + return fi.raw.Mode == filemode.Dir +} + +func (fi *gitFileinfo) Mode() fs.FileMode { + mode, _ := fi.raw.Mode.ToOSFileMode() + return mode +} + +func (di *gitDirinfo) Name() string { + return path.Base(di.name) +} +func (di *gitDirinfo) IsDir() bool { + return true +} +func (di *gitDirinfo) Mode() fs.FileMode { + return fs.FileMode(0o755) +} diff --git a/vcs/vcs.go b/vcs/vcs.go index 1a5e404c..6f0ef3c9 100644 --- a/vcs/vcs.go +++ b/vcs/vcs.go @@ -3,9 +3,9 @@ package vcs import ( "fmt" "io" + "io/fs" "log" "os" - "path/filepath" ) // A collection that maps vcs names to their underlying @@ -15,10 +15,18 @@ var drivers = make(map[string]func(c []byte) (Driver, error)) // A filesystem API abstraction to allow accessing vcs objects directly // instead of duplicating them on disk +type FileInfo interface { + Name() string + IsDir() bool + Mode() fs.FileMode +} + +type FileSystemWalkFunc func(path string, info FileInfo, err error) error + type FileSystem interface { Open(name string) (io.ReadCloser, error) - Walk(fn filepath.WalkFunc) error + Walk(fn FileSystemWalkFunc) error } // A "plugin" for each vcs that supports the very limited set of vcs