From f5e4427903512d9d9f4843762137635806a84d21 Mon Sep 17 00:00:00 2001
From: martino <32328813+f3rs3n@users.noreply.github.com>
Date: Sat, 19 Sep 2026 12:05:10 +0200
Subject: [PATCH] fix: restore Fastfetch config generation

---
 .../post_install/customizable_post_install.sh | 30 +++++--
 tests/test_fastfetch_config_generation.py     | 90 +++++++++++++++++++
 2 files changed, 114 insertions(+), 6 deletions(-)
 create mode 100644 tests/test_fastfetch_config_generation.py

diff --git a/scripts/post_install/customizable_post_install.sh b/scripts/post_install/customizable_post_install.sh
index 056ac8a1..3dae2527 100644
--- a/scripts/post_install/customizable_post_install.sh
+++ b/scripts/post_install/customizable_post_install.sh
@@ -2521,8 +2521,28 @@ enable_ha() {
 
 
 
+_generate_fastfetch_config() {
+    local target="$1"
+    local temp_dir generated_config
+
+    temp_dir="$(mktemp -d)" || return 1
+    generated_config="$temp_dir/config.jsonc"
+
+    if ! fastfetch --gen-config "$generated_config" > /dev/null 2>&1; then
+        rm -rf "$temp_dir"
+        return 1
+    fi
+
+    if ! pmx_write_file "$target" < "$generated_config"; then
+        rm -rf "$temp_dir"
+        return 1
+    fi
+
+    rm -rf "$temp_dir"
+}
+
 configure_fastfetch() {
-    local FUNC_VERSION="1.1"
+    local FUNC_VERSION="1.2"
     pmx_journal_context "configure_fastfetch" "$FUNC_VERSION"
     # description: Install Fastfetch system summary tool with the ProxMenux logo + status block as the SSH login banner.
     msg_info2 "$(translate "Installing and configuring Fastfetch...")"
@@ -2608,13 +2628,11 @@ configure_fastfetch() {
         return 1
     fi
 
-    
-    if [ ! -f "$fastfetch_config" ]; then
-        echo '{"$schema": "https://github.com/fastfetch-cli/fastfetch/raw/dev/doc/json_schema.json", "modules": []}' | pmx_write_file "$fastfetch_config"
+    if ! _generate_fastfetch_config "$fastfetch_config"; then
+        msg_error "$(translate "Failed to generate Fastfetch configuration.")"
+        return 1
     fi
 
-    fastfetch --gen-config-force > /dev/null 2>&1
-
     while true; do
         # Define logo options
         local logo_options=("ProxMenux" "Proxmox (default)" "JC Channel" "Comunidad Helper-Scripts" "Home-Labs-Club" "Proxmology" "Custom")
diff --git a/tests/test_fastfetch_config_generation.py b/tests/test_fastfetch_config_generation.py
new file mode 100644
index 00000000..63aeb494
--- /dev/null
+++ b/tests/test_fastfetch_config_generation.py
@@ -0,0 +1,90 @@
+"""Regression tests for Fastfetch config generation.
+
+Run: python3 -m unittest discover -s tests -p test_fastfetch_config_generation.py -v
+"""
+from pathlib import Path
+import re
+import shlex
+import subprocess
+import tempfile
+import unittest
+
+SCRIPT = (
+    Path(__file__).resolve().parents[1]
+    / "scripts/post_install/customizable_post_install.sh"
+)
+
+
+def extract_function(name: str) -> str:
+    text = SCRIPT.read_text()
+    match = re.search(rf"^{re.escape(name)}\(\) \{{\n.*?^\}}", text, re.M | re.S)
+    if match is None:
+        raise AssertionError(f"function {name} not found")
+    return match.group(0)
+
+
+class FastfetchConfigGeneration(unittest.TestCase):
+    def test_script_does_not_use_retired_force_option(self):
+        self.assertNotIn("--gen-config-force", SCRIPT.read_text())
+
+    def run_case(self, fastfetch_exit: int = 0):
+        function = extract_function("_generate_fastfetch_config")
+        with tempfile.TemporaryDirectory(prefix="fastfetch-config-test-") as td:
+            root = Path(td)
+            fake_bin = root / "bin"
+            fake_bin.mkdir()
+            target = root / "config.jsonc"
+            target.write_text('{"modules":["preserved"]}\n')
+            calls = root / "calls"
+            fake = fake_bin / "fastfetch"
+            fake.write_text(
+                "#!/bin/bash\n"
+                "printf '%s\\n' \"$*\" >> \"$CALLS\"\n"
+                f"if (( {fastfetch_exit} != 0 )); then exit {fastfetch_exit}; fi\n"
+                "[[ \"$1\" == --gen-config && -n \"$2\" ]] || exit 90\n"
+                "[[ ! -e \"$2\" ]] || exit 91\n"
+                "printf '%s\\n' '{\"modules\":[\"os\",\"kernel\"]}' > \"$2\"\n"
+            )
+            fake.chmod(0o755)
+            q = shlex.quote
+            harness = function + f"""
+pmx_write_file() {{ cat > "$1"; }}
+_generate_fastfetch_config {q(str(target))}
+printf 'status=%s\n' "$?"
+printf 'target=%s\n' "$(cat {q(str(target))})"
+"""
+            result = subprocess.run(
+                ["/bin/bash", "--noprofile", "--norc"],
+                input=harness,
+                text=True,
+                capture_output=True,
+                timeout=10,
+                env={
+                    "PATH": f"{fake_bin}:/usr/bin:/bin",
+                    "CALLS": str(calls),
+                    "LC_ALL": "C",
+                },
+            )
+            return result, target.read_text(), calls.read_text() if calls.exists() else ""
+
+    def test_generates_to_temporary_path_before_replacing_target(self):
+        result, target, calls = self.run_case()
+        self.assertEqual(result.returncode, 0, result.stderr)
+        self.assertIn("status=0\n", result.stdout)
+        self.assertEqual(target, '{"modules":["os","kernel"]}\n')
+        self.assertRegex(calls, r"^--gen-config /tmp/.+/config\.jsonc\n$")
+        self.assertNotIn("--gen-config-force", calls)
+        generated_config = Path(calls.removeprefix("--gen-config ").strip())
+        self.assertFalse(generated_config.parent.exists())
+
+    def test_generation_failure_preserves_existing_config(self):
+        result, target, calls = self.run_case(fastfetch_exit=17)
+        self.assertEqual(result.returncode, 0, result.stderr)
+        self.assertIn("status=1\n", result.stdout)
+        self.assertEqual(target, '{"modules":["preserved"]}\n')
+        generated_config = Path(calls.removeprefix("--gen-config ").strip())
+        self.assertFalse(generated_config.parent.exists())
+
+
+if __name__ == "__main__":
+    unittest.main()