init

local/bin/dmenu.py

@@ -0,0 +1,161 @@
+#!/usr/bin/env python3
+
+import os
+import subprocess
+import sys
+from pathlib import Path
+
+
+DMENU_ARGS = [
+    "dmenu",
+    "-i",
+    "-fn", "JetBrainsMono Nerd Font-10",
+    "-nb", "#121212",
+    "-nf", "#e0e0e0",
+    "-sb", "#222222",
+    "-sf", "#e0e0e0",
+    "-l", "10",
+    "-p", "Launch:",
+]
+
+DESKTOP_DIRS = [
+    Path.home() / ".local/share/applications",
+    Path.home() / ".local/share/flatpak/exports/share/applications",
+    Path("/var/lib/flatpak/exports/share/applications"),
+    Path("/usr/share/applications"),
+    Path("/usr/local/share/applications"),
+]
+
+INVALID_EXEC_PREFIXES = ("wine", "wscript", "rundll32", "winhlp32", "hh ")
+
+
+def parse_desktop_file(path: Path):
+    """
+    Returns (name, exec_cmd) or (None, None) if the file should be skipped.
+    Handles: NoDisplay=true, Hidden=true, missing Name/Exec, field codes, env wrappers.
+    """
+    props = {}
+    in_desktop_entry = False
+
+    try:
+        with path.open(encoding="utf-8", errors="replace") as f:
+            for line in f:
+                line = line.rstrip("\n")
+                if line.startswith("["):
+                    in_desktop_entry = line == "[Desktop Entry]"
+                    continue
+                if not in_desktop_entry or "=" not in line:
+                    continue
+                key, _, value = line.partition("=")
+                key = key.strip()
+                if key not in props:
+                    props[key] = value.strip()
+    except OSError:
+        return None, None
+
+    if props.get("NoDisplay", "").lower() == "true":
+        return None, None
+    if props.get("Hidden", "").lower() == "true":
+        return None, None
+    if props.get("Type", "") != "Application":
+        return None, None
+
+    name = props.get("Name")
+    exec_raw = props.get("Exec")
+
+    if not name or not exec_raw:
+        return None, None
+
+    exec_cmd = clean_exec(exec_raw)
+
+    if not exec_cmd:
+        return None, None
+
+    lower = exec_cmd.lower()
+    if any(lower.startswith(p) for p in INVALID_EXEC_PREFIXES):
+        return None, None
+
+    terminal = props.get("Terminal", "").lower() == "true"
+    if terminal:
+        term = os.environ.get("TERMINAL", "xterm")
+        exec_cmd = f"{term} -e {exec_cmd}"
+
+    return name, exec_cmd
+
+
+def clean_exec(exec_raw: str) -> str:
+    tokens = exec_raw.split()
+    cleaned = []
+    for token in tokens:
+        if token.startswith("%") and len(token) == 2 and token[1].isalpha():
+            continue
+        cleaned.append(token)
+    return " ".join(cleaned).strip()
+
+
+def collect_apps():
+    seen_stems = {}
+    for directory in DESKTOP_DIRS:
+        if not directory.is_dir():
+            continue
+        for desktop_file in sorted(directory.glob("*.desktop")):
+            stem = desktop_file.stem.lower()
+            if stem not in seen_stems:
+                seen_stems[stem] = desktop_file
+
+    apps = {}
+    for desktop_file in seen_stems.values():
+        name, cmd = parse_desktop_file(desktop_file)
+        if name and cmd and name not in apps:
+            apps[name] = cmd
+    return apps
+
+
+def run_dmenu(app_names: list[str]) -> str | None:
+    names_input = "\n".join(sorted(app_names, key=str.casefold)).encode()
+    try:
+        result = subprocess.run(
+            DMENU_ARGS,
+            input=names_input,
+            capture_output=True,
+        )
+    except FileNotFoundError:
+        sys.exit("error: dmenu not found in PATH")
+
+    if result.returncode != 0:
+        return None
+
+    return result.stdout.decode().strip()
+
+
+def launch(cmd: str):
+    subprocess.Popen(
+        cmd,
+        shell=True,
+        stdin=subprocess.DEVNULL,
+        stdout=subprocess.DEVNULL,
+        stderr=subprocess.DEVNULL,
+        start_new_session=True,
+    )
+
+
+def main():
+    apps = collect_apps()
+
+    if not apps:
+        sys.exit("error: no applications found")
+
+    selected = run_dmenu(list(apps.keys()))
+
+    if not selected:
+        return
+
+    cmd = apps.get(selected)
+    if not cmd:
+        sys.exit(f"error: no command found for '{selected}'")
+
+    launch(cmd)
+
+
+if __name__ == "__main__":
+    main()