fix: path discovery of cosmoteer for manjaro linux

tests/steam_paths.py

@@ -0,0 +1,84 @@
+#!/usr/bin/env python3
+# ABOUT ME
+# Locates Cosmoteer's installed Data folder by asking Steam where its libraries
+# are.
+#
+# Why this exists: the mod tests validate against vanilla game data, and the
+# game can be installed to any Steam library on any disk. A fixed list of
+# guessed paths misses real installs, so this reads the library roots out of
+# Steam's own libraryfolders.vdf and looks for the game under each one.
+#
+# install.sh carries the same logic in bash for finding the Mods folder.
+
+import os
+import re
+
+COSMOTEER_APPID = 799600
+
+# One "path" entry per library root; the app data sits in <path>/steamapps.
+_LIBRARY_PATH_RE = re.compile(r'^\s*"path"\s*"(.*)"\s*$')
+
+
+def steam_roots(home):
+    """The Steam client directories, one per install flavour."""
+    return [
+        os.path.join(home, ".local/share/Steam"),
+        os.path.join(home, ".steam/steam"),
+        os.path.join(home, ".steam/root"),
+        os.path.join(home, ".var/app/com.valvesoftware.Steam/data/Steam"),
+    ]
+
+
+def steam_libraries(home):
+    """Every Steam library root, in search order and without duplicates.
+
+    Steam's own roots come first so the default library stays searchable even
+    when libraryfolders.vdf is missing or unreadable.
+    """
+    libraries = list(steam_roots(home))
+    for root in steam_roots(home):
+        vdf = os.path.join(root, "steamapps", "libraryfolders.vdf")
+        try:
+            with open(vdf, encoding="utf-8", errors="replace") as handle:
+                lines = handle.readlines()
+        except OSError:
+            continue
+        for line in lines:
+            match = _LIBRARY_PATH_RE.match(line)
+            if match:
+                libraries.append(match.group(1).replace("\\\\", "\\"))
+
+    seen = set()
+    unique = []
+    for library in libraries:
+        if library not in seen:
+            seen.add(library)
+            unique.append(library)
+    return unique
+
+
+def find_data_dir(home=None, environ=None):
+    """The Cosmoteer Data folder, or None when the game is not installed.
+
+    COSMOTEER_DATA overrides discovery so an unusual install can be pointed at
+    by hand.
+    """
+    environ = os.environ if environ is None else environ
+    override = environ.get("COSMOTEER_DATA")
+    if override:
+        return override
+
+    home = os.path.expanduser("~") if home is None else home
+    for library in steam_libraries(home):
+        data = os.path.join(library, "steamapps", "common", "Cosmoteer", "Data")
+        if os.path.isdir(data):
+            return data
+    return None
+
+
+def find_bin_dir(home=None, environ=None):
+    """The Cosmoteer Bin folder, which sits beside Data."""
+    data = find_data_dir(home=home, environ=environ)
+    if not data:
+        return None
+    return os.path.join(os.path.dirname(data), "Bin")