4a5f7e43a3
Git documents the default global attributes file if core.attributesFile is not specified as $XDG_CONFIG_HOME/git/attributes, or $HOME/.config/git/attributes if $XDG_CONFIG_HOME is not set or empty. Teach our attributes file code about this file and read it as normal.
199 lines
5.1 KiB
Go
199 lines
5.1 KiB
Go
package git
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import (
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"os"
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"path/filepath"
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"github.com/git-lfs/git-lfs/filepathfilter"
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"github.com/git-lfs/git-lfs/git/gitattr"
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"github.com/git-lfs/git-lfs/tools"
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"github.com/rubyist/tracerx"
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)
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const (
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LockableAttrib = "lockable"
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FilterAttrib = "filter"
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)
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// AttributePath is a path entry in a gitattributes file which has the LFS filter
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type AttributePath struct {
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// Path entry in the attribute file
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Path string
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// The attribute file which was the source of this entry
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Source *AttributeSource
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// Path also has the 'lockable' attribute
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Lockable bool
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// Path is handled by Git LFS (i.e., filter=lfs)
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Tracked bool
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}
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type AttributeSource struct {
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Path string
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LineEnding string
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}
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type attrFile struct {
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path string
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readMacros bool
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}
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func (s *AttributeSource) String() string {
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return s.Path
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}
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// GetRootAttributePaths beahves as GetRootAttributePaths, and loads information
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// only from the global gitattributes file.
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func GetRootAttributePaths(mp *gitattr.MacroProcessor, cfg Env) []AttributePath {
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af, _ := cfg.Get("core.attributesfile")
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af, err := tools.ExpandConfigPath(af, "git/attributes")
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if err != nil {
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return nil
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}
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if _, err := os.Stat(af); os.IsNotExist(err) {
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return nil
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}
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// The working directory for the root gitattributes file is blank.
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return attrPaths(mp, af, "", true)
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}
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// GetSystemAttributePaths behaves as GetAttributePaths, and loads information
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// only from the system gitattributes file, respecting the $PREFIX environment
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// variable.
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func GetSystemAttributePaths(mp *gitattr.MacroProcessor, env Env) []AttributePath {
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prefix, _ := env.Get("PREFIX")
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if len(prefix) == 0 {
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prefix = string(filepath.Separator)
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}
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path := filepath.Join(prefix, "etc", "gitattributes")
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if _, err := os.Stat(path); os.IsNotExist(err) {
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return nil
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}
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return attrPaths(mp, path, "", true)
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}
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// GetAttributePaths returns a list of entries in .gitattributes which are
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// configured with the filter=lfs attribute
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// workingDir is the root of the working copy
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// gitDir is the root of the git repo
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func GetAttributePaths(mp *gitattr.MacroProcessor, workingDir, gitDir string) []AttributePath {
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paths := make([]AttributePath, 0)
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for _, file := range findAttributeFiles(workingDir, gitDir) {
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paths = append(paths, attrPaths(mp, file.path, workingDir, file.readMacros)...)
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}
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return paths
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}
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func attrPaths(mp *gitattr.MacroProcessor, path, workingDir string, readMacros bool) []AttributePath {
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attributes, err := os.Open(path)
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if err != nil {
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return nil
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}
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defer attributes.Close()
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var paths []AttributePath
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relfile, _ := filepath.Rel(workingDir, path)
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reldir := filepath.Dir(relfile)
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source := &AttributeSource{Path: relfile}
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lines, eol, err := gitattr.ParseLines(attributes)
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if err != nil {
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return nil
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}
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lines = mp.ProcessLines(lines, readMacros)
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for _, line := range lines {
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lockable := false
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tracked := false
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hasFilter := false
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for _, attr := range line.Attrs {
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if attr.K == FilterAttrib {
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hasFilter = true
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tracked = attr.V == "lfs"
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} else if attr.K == LockableAttrib && attr.V == "true" {
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lockable = true
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}
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}
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if !hasFilter && !lockable {
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continue
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}
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pattern := line.Pattern.String()
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if len(reldir) > 0 {
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pattern = filepath.Join(reldir, pattern)
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}
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paths = append(paths, AttributePath{
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Path: pattern,
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Source: source,
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Lockable: lockable,
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Tracked: tracked,
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})
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}
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source.LineEnding = eol
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return paths
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}
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// GetAttributeFilter returns a list of entries in .gitattributes which are
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// configured with the filter=lfs attribute as a file path filter which
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// file paths can be matched against
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// workingDir is the root of the working copy
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// gitDir is the root of the git repo
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func GetAttributeFilter(workingDir, gitDir string) *filepathfilter.Filter {
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paths := GetAttributePaths(gitattr.NewMacroProcessor(), workingDir, gitDir)
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patterns := make([]filepathfilter.Pattern, 0, len(paths))
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for _, path := range paths {
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// Convert all separators to `/` before creating a pattern to
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// avoid characters being escaped in situations like `subtree\*.md`
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patterns = append(patterns, filepathfilter.NewPattern(filepath.ToSlash(path.Path)))
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}
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return filepathfilter.NewFromPatterns(patterns, nil)
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}
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func findAttributeFiles(workingDir, gitDir string) []attrFile {
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var paths []attrFile
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repoAttributes := filepath.Join(gitDir, "info", "attributes")
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if info, err := os.Stat(repoAttributes); err == nil && !info.IsDir() {
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paths = append(paths, attrFile{path: repoAttributes, readMacros: true})
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}
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tools.FastWalkGitRepo(workingDir, func(parentDir string, info os.FileInfo, err error) {
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if err != nil {
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tracerx.Printf("Error finding .gitattributes: %v", err)
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return
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}
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if info.IsDir() || info.Name() != ".gitattributes" {
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return
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}
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paths = append(paths, attrFile{
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path: filepath.Join(parentDir, info.Name()),
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readMacros: parentDir == workingDir,
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})
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})
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// reverse the order of the files so more specific entries are found first
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// when iterating from the front (respects precedence)
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for i, j := 0, len(paths)-1; i < j; i, j = i+1, j-1 {
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paths[i], paths[j] = paths[j], paths[i]
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}
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return paths
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}
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