feat(git): parse git config -z --list for the page

NUL between entries and the first newline between name and value, so
values holding = or newlines survive. The key is after the last dot, so
color.branch.remote groups under color.branch.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

2 files changed, 63 insertions, 0 deletions

diff --git a/desktop/modules/git/Git.js b/desktop/modules/git/Git.js
new file mode 100644
index 0000000..008fefc
--- /dev/null
+++ b/desktop/modules/git/Git.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 2 as
+// published by the Free Software Foundation.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+.pragma library
+
+// Pure helpers for the git page, tested by test_git.js under node.
+
+// `gitcfg list` (git config -z --list) into [{name, section, key, value}],
+// in file order. The key is after the last dot, so a subsection stays in the
+// section: color.branch.remote is section color.branch.
+function parse(text) {
+    return text.split("\0").filter(e => e !== "").map(e => {
+        const nl = e.indexOf("\n");
+        const name = nl < 0 ? e : e.slice(0, nl);
+        const dot = name.lastIndexOf(".");
+        return { name, section: name.slice(0, dot), key: name.slice(dot + 1),
+                 value: nl < 0 ? "" : e.slice(nl + 1) };
+    });
+}
diff --git a/desktop/modules/git/test_git.js b/desktop/modules/git/test_git.js
new file mode 100644
index 0000000..c18d084
--- /dev/null
+++ b/desktop/modules/git/test_git.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 2 as
+// published by the Free Software Foundation.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// Run: node desktop/modules/git/test_git.js
+// Git.js is a QML library, so its .pragma line is stripped before node
+// evaluates it.
+
+const fs = require("fs");
+const assert = require("assert");
+
+const src = fs.readFileSync(__dirname + "/Git.js", "utf8")
+    .replace(/^\.pragma library$/m, "");
+const G = new Function(src + "\nreturn { parse };")();
+
+// `gitcfg list` output: name, newline, value, NUL. A subsection's dots stay
+// in the section; a value keeps its = and its own newlines; a valueless
+// boolean has no newline at all.
+assert.deepStrictEqual(G.parse("user.name\nJane D.\0color.branch.remote\nyellow\0"
+                               + "alias.x\n!f() { a=1\nb; }\0x.flag\0"), [
+    { name: "user.name", section: "user", key: "name", value: "Jane D." },
+    { name: "color.branch.remote", section: "color.branch", key: "remote", value: "yellow" },
+    { name: "alias.x", section: "alias", key: "x", value: "!f() { a=1\nb; }" },
+    { name: "x.flag", section: "x", key: "flag", value: "" },
+]);
+// No config file: gitcfg prints nothing.
+assert.deepStrictEqual(G.parse(""), []);
+
+console.log("test_git: ok");