[gitconfig] Fix splitting of Key-Value pairs (#2482)

Previously we were ignoring anything after the second equal sign.
This was invalid.

Fixes #2479

RELEASE_NOTES=[BUGFIX] [gitconfig] Properly parse Key-Value pairs with
multiple equal signs.

Signed-off-by: Dominik Schulz <dominik.schulz@gauner.org>

Signed-off-by: Dominik Schulz <dominik.schulz@gauner.org>

pkg/gitconfig/config.go

@@ -256,22 +256,27 @@ func parseConfig(in io.Reader, key, value string, cb parseFunc) []string {
 			continue
 		}
 
-		kvp := strings.Split(line, "=")
-		trim(kvp)
-		if len(kvp) < 2 {
+		// TODO(gitconfig) This will skip over valid entries like this one:
+		// [core]
+		//  sslVerify
+		// These are odd but we should still support them.
+		k, v, found := strings.Cut(line, " = ")
+		if !found {
+			debug.Log("no valid KV-pair on line: %q", line)
+
 			continue
 		}
 
 		fKey := section + "."
 		if subsection != "" {
 			fKey += subsection + "."
 		}
-		fKey += kvp[0]
+		fKey += k
 		if key == "" {
-			wKey = kvp[0]
+			wKey = k
 		}
 
-		oValue := kvp[1]
+		oValue := v
 		comment := ""
 
 		if strings.ContainsAny(oValue, "#;") {

pkg/gitconfig/gitconfig_test.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"golang.org/x/exp/maps"
 )
 
 // https://mirrors.edge.kernel.org/pub/software/scm/git/docs/git-config.html#EXAMPLES
@@ -168,6 +169,7 @@ var configSampleComplex = `
   autocrlf = input
   protectHFS = true
   protectNTFS = true
+  sshCommand = ssh -oControlMaster=auto -oControlPersist=600 -oControlPath=/tmp/.ssh-%C
 
 [receive]
   fsckObjects = true
@@ -308,14 +310,35 @@ func TestGopass(t *testing.T) {
 	t.Logf("Vars:\n%+v\n", c.global.vars)
 }
 
-func TestParse(t *testing.T) {
+func TestParseSimple(t *testing.T) {
 	t.Parallel()
 
 	c := ParseConfig(strings.NewReader(configSampleDocs))
 
 	for k, v := range c.vars {
 		t.Logf("%s => %s\n", k, v)
 	}
+
+	want := map[string]string{
+		"core.filemode": "false",
+		"diff.external": "/usr/local/bin/diff-wrapper",
+		"diff.renames":  "true",
+		"core.gitproxy": "default-proxy",
+		// TODO(gitconfig): "http.sslVerify": "", // not supported, yet
+		"http.https://weak.example.com.sslVerify":  "false",
+		"http.https://weak.example.com.cookieFile": "/tmp/cookie.txt",
+	}
+
+	assert.Equal(t, want, c.vars)
+}
+
+func TestParseComplex(t *testing.T) {
+	t.Parallel()
+
+	c := ParseConfig(strings.NewReader(configSampleComplex))
+
+	assert.Contains(t, maps.Keys(c.vars), "core.sshCommand")
+	assert.Equal(t, "ssh -oControlMaster=auto -oControlPersist=600 -oControlPath=/tmp/.ssh-%C", c.vars["core.sshCommand"])
 }
 
 func TestGitBinary(t *testing.T) {