add PyInstaller script and hook (#166)

Makefile

@@ -23,11 +23,14 @@ release: man completion docs/supportedsites.rst
 test:
 	scripts/run_tests.sh
 
+executable:
+	scripts/pyinstaller.py
+
 completion: gallery-dl.bash_completion
 
 man: gallery-dl.1 gallery-dl.conf.5
 
-.PHONY: all clean install release test completion man
+.PHONY: all clean install release test executable completion man
 
 docs/supportedsites.rst: gallery_dl/*/*.py scripts/supportedsites.py
 	$(PYTHON) scripts/supportedsites.py

scripts/hook-gallery_dl.py

@@ -0,0 +1,9 @@
+# -*- coding: utf-8 -*-
+
+from gallery_dl import extractor, downloader, postprocessor
+
+hiddenimports = [
+    package.__name__ + "." + module
+    for package in (extractor, downloader, postprocessor)
+    for module in package.modules
+]

scripts/pyinstaller.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+"""Build a standalone executable using PyInstaller"""
+
+import PyInstaller.__main__
+import util
+
+PyInstaller.__main__.run([
+    "--onefile",
+    "--console",
+    "--name", "gallery-dl." + ("exe" if PyInstaller.is_win else "bin"),
+    "--additional-hooks-dir", util.path("scripts"),
+    "--distpath", util.path("dist"),
+    "--workpath", util.path("build"),
+    "--specpath", util.path("build"),
+    util.path("gallery_dl", "__main__.py"),
+])