fix: path discovery of cosmoteer for manjaro linux

tests/test_install.sh

@@ -0,0 +1,122 @@
+#!/usr/bin/env bash
+# ABOUT ME
+# Tests install.sh's discovery of the Cosmoteer Mods folder.
+#
+# Why it exists: the Mods folder sits inside a Proton prefix under whichever
+# Steam library the game was installed to, and that library can live anywhere.
+# Guessing paths misses real installs, so discovery reads Steam's own
+# libraryfolders.vdf. These tests build fake Steam trees and check that the
+# discovery finds the Mods folder in each layout.
+#
+# Usage:  ./tests/test_install.sh
+
+set -uo pipefail
+
+REPO_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+APPID=799600
+PROFILE=76561198000495479
+
+# Sourcing install.sh must define the functions without installing anything.
+source "$REPO_DIR/install.sh"
+
+failures=0
+tmp_root="$(mktemp -d)"
+trap 'rm -rf "$tmp_root"' EXIT
+
+check() {
+	# check <name> <expected> <actual>
+	if [ "$2" = "$3" ]; then
+		echo "PASS: $1"
+	else
+		echo "FAIL: $1"
+		echo "        expected: $2"
+		echo "        actual:   $3"
+		failures=$((failures + 1))
+	fi
+}
+
+# Builds a Steam client dir at <root>/.local/share/Steam whose
+# libraryfolders.vdf lists every library path passed after the root.
+make_steam_home() {
+	local home="$1"
+	shift
+	local vdf="$home/.local/share/Steam/steamapps/libraryfolders.vdf"
+	mkdir -p "$(dirname "$vdf")"
+	{
+		echo '"libraryfolders"'
+		echo '{'
+		local i=0
+		for lib in "$@"; do
+			printf '\t"%s"\n\t{\n\t\t"path"\t\t"%s"\n\t}\n' "$i" "$lib"
+			i=$((i + 1))
+		done
+		echo '}'
+	} >"$vdf"
+}
+
+# Creates the Proton-prefix Mods folder for Cosmoteer inside a library root.
+make_proton_mods() {
+	local lib="$1"
+	local mods="$lib/steamapps/compatdata/$APPID/pfx/drive_c/users/steamuser/Saved Games/Cosmoteer/$PROFILE/Mods"
+	mkdir -p "$mods"
+	printf '%s\n' "$mods"
+}
+
+# 1. The game lives in a secondary library on another disk, which is the case
+#    whenever Steam is told to install to a second drive.
+case1="$tmp_root/case1"
+mkdir -p "$case1/home"
+lib="$case1/disk2/steamapps"
+make_steam_home "$case1/home" "$case1/home/.local/share/Steam" "$lib"
+expected="$(make_proton_mods "$lib")"
+actual="$(HOME="$case1/home" find_mods_dir)"
+check "finds Mods in a secondary library from libraryfolders.vdf" "$expected" "$actual"
+
+# 2. The game lives in the default library inside the Steam client dir.
+case2="$tmp_root/case2"
+mkdir -p "$case2/home"
+make_steam_home "$case2/home" "$case2/home/.local/share/Steam"
+expected="$(make_proton_mods "$case2/home/.local/share/Steam")"
+actual="$(HOME="$case2/home" find_mods_dir)"
+check "finds Mods in the default Steam library" "$expected" "$actual"
+
+# 3. Library paths may contain spaces, so discovery must not word-split them.
+case3="$tmp_root/case3"
+mkdir -p "$case3/home"
+lib="$case3/my games/steamapps"
+make_steam_home "$case3/home" "$case3/home/.local/share/Steam" "$lib"
+expected="$(make_proton_mods "$lib")"
+actual="$(HOME="$case3/home" find_mods_dir)"
+check "finds Mods under a library path containing spaces" "$expected" "$actual"
+
+# 4. A Windows-style profile in the user's home, for a non-Proton install.
+case4="$tmp_root/case4"
+mkdir -p "$case4/home/Saved Games/Cosmoteer/$PROFILE/Mods"
+expected="$case4/home/Saved Games/Cosmoteer/$PROFILE/Mods"
+actual="$(HOME="$case4/home" find_mods_dir)"
+check "finds Mods in the home Saved Games folder" "$expected" "$actual"
+
+# 5. Nothing installed at all: discovery reports failure instead of guessing.
+case5="$tmp_root/case5"
+mkdir -p "$case5/home"
+actual="$(HOME="$case5/home" find_mods_dir)"
+status=$?
+check "reports no Mods folder when there is no install" "" "$actual"
+check "exits non-zero when there is no install" "1" "$status"
+
+# 6. COSMOTEER_MODS_DIR overrides discovery, so an unusual install can be
+#    pointed at by hand.
+case6="$tmp_root/case6"
+mkdir -p "$case6/elsewhere/Mods"
+make_steam_home "$case6/home" "$case6/home/.local/share/Steam"
+make_proton_mods "$case6/home/.local/share/Steam" >/dev/null
+actual="$(HOME="$case6/home" COSMOTEER_MODS_DIR="$case6/elsewhere/Mods" resolve_mods_dir)"
+check "COSMOTEER_MODS_DIR overrides discovery" "$case6/elsewhere/Mods" "$actual"
+
+echo
+if [ "$failures" -eq 0 ]; then
+	echo "All install.sh discovery tests passed."
+else
+	echo "$failures test(s) failed."
+	exit 1
+fi