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package config
import (
"fmt"
"os"
"strconv"
"strings"
"sync"
"github.com/git-lfs/git-lfs/v3/git"
"github.com/git-lfs/git-lfs/v3/tr"
)
type GitFetcher struct {
vmu sync.RWMutex
vals map[string][]string
}
func readGitConfig(configs ...*git.ConfigurationSource) (gf *GitFetcher, extensions map[string]Extension, uniqRemotes map[string]bool) {
vals := make(map[string][]string)
ignored := make([]string, 0)
extensions = make(map[string]Extension)
uniqRemotes = make(map[string]bool)
for _, gc := range configs {
uniqKeys := make(map[string]string)
for _, line := range gc.Lines {
pieces := strings.SplitN(line, "=", 2)
if len(pieces) < 2 {
continue
}
allowed := !gc.OnlySafeKeys
// We don't need to change the case of the key here,
// since Git will already have canonicalized it for us.
key, val := pieces[0], pieces[1]
if origKey, ok := uniqKeys[key]; ok {
if ShowConfigWarnings && len(vals[key]) > 0 && vals[key][len(vals[key])-1] != val && strings.HasPrefix(key, gitConfigWarningPrefix) {
fmt.Fprintln(os.Stderr, tr.Tr.Get("warning: These `git config` values clash:"))
fmt.Fprintf(os.Stderr, " git config %q = %q\n", origKey, vals[key])
fmt.Fprintf(os.Stderr, " git config %q = %q\n", pieces[0], val)
}
} else {
uniqKeys[key] = pieces[0]
}
parts := strings.Split(key, ".")
if len(parts) == 4 && parts[0] == "lfs" && parts[1] == "extension" {
// prop: lfs.extension.<name>.<prop>
name := parts[2]
prop := parts[3]
ext := extensions[name]
ext.Name = name
switch prop {
case "clean":
if gc.OnlySafeKeys {
ignored = append(ignored, key)
continue
}
ext.Clean = val
case "smudge":
if gc.OnlySafeKeys {
ignored = append(ignored, key)
continue
}
ext.Smudge = val
case "priority":
allowed = true
p, err := strconv.Atoi(val)
if err == nil && p >= 0 {
ext.Priority = p
}
}
extensions[name] = ext
} else if len(parts) > 1 && parts[0] == "remote" {
if gc.OnlySafeKeys && (len(parts) == 3 && parts[2] != "lfsurl") {
ignored = append(ignored, key)
continue
}
allowed = true
remote := strings.Join(parts[1:len(parts)-1], ".")
uniqRemotes[remote] = remote == "origin"
} else if len(parts) > 2 && parts[len(parts)-1] == "access" {
allowed = true
}
if !allowed && keyIsUnsafe(key) {
ignored = append(ignored, key)
continue
}
vals[key] = append(vals[key], val)
}
}
if len(ignored) > 0 {
fmt.Fprint(os.Stderr, tr.Tr.Get("warning: These unsafe '.lfsconfig' keys were ignored:"), "\n\n")
for _, key := range ignored {
fmt.Fprintf(os.Stderr, " %s\n", key)
}
}
gf = &GitFetcher{vals: vals}
return
}
// Get implements the Fetcher interface, and returns the value associated with
// a given key and true, signaling that the value was present. Otherwise, an
// empty string and false will be returned, signaling that the value was
// absent.
//
// Map lookup by key is case-insensitive, except for the middle part of a
// three-part key, as per the .gitconfig specification.
//
// Get is safe to call across multiple goroutines.
func (g *GitFetcher) Get(key string) (val string, ok bool) {
all := g.GetAll(key)
if len(all) == 0 {
return "", false
}
return all[len(all)-1], true
}
func (g *GitFetcher) GetAll(key string) []string {
g.vmu.RLock()
defer g.vmu.RUnlock()
return g.vals[g.caseFoldKey(key)]
}
func (g *GitFetcher) All() map[string][]string {
newmap := make(map[string][]string)
g.vmu.RLock()
defer g.vmu.RUnlock()
for key, values := range g.vals {
for _, value := range values {
newmap[key] = append(newmap[key], value)
}
}
return newmap
}
func (g *GitFetcher) caseFoldKey(key string) string {
parts := strings.Split(key, ".")
last := len(parts) - 1
// We check for 3 or more parts here because if the middle part is a
// URL, it may have dots in it. We'll downcase the part before the first
// dot and after the last dot, but preserve the piece in the middle,
// which may be a branch name, remote, or URL, all of which are
// case-sensitive. This is the algorithm Git uses to canonicalize its
// keys.
if len(parts) < 3 {
return strings.ToLower(key)
}
return strings.Join([]string{
strings.ToLower(parts[0]),
strings.Join(parts[1:last], "."),
strings.ToLower(parts[last]),
}, ".")
}
func keyIsUnsafe(key string) bool {
for _, safe := range safeKeys {
if safe == key {
return false
}
}
return true
}
var safeKeys = []string{
"lfs.allowincompletepush",
"lfs.fetchexclude",
"lfs.fetchinclude",
"lfs.gitprotocol",
"lfs.locksverify",
"lfs.pushurl",
"lfs.skipdownloaderrors",
"lfs.url",
}
|
