Reintroduce Python Zipapp support

 * Added `main` function as an entry point.
 * Created `__main__.py` to allow the creation of Zipapps without explicitly
   calling `meson:main`.

1 files changed, 9 insertions, 6 deletions

diff --git a/meson.py b/meson.py
index 492f70d..4d8a269 100755
--- a/meson.py
+++ b/meson.py
@@ -15,11 +15,14 @@
 # limitations under the License.
 
 from mesonbuild import mesonmain
-import sys, os, os.path
+import sys, os
 
-launcher = sys.argv[0]
-# resolve the command path if not launched from $PATH
-if os.path.split(launcher)[0]:
-    launcher = os.path.realpath(launcher)
+def main():
+    launcher = sys.argv[0]
+    # resolve the command path if not launched from $PATH
+    if os.path.split(launcher)[0]:
+        launcher = os.path.realpath(launcher)
+    return mesonmain.run(launcher, sys.argv[1:])
 
-sys.exit(mesonmain.run(launcher, sys.argv[1:]))
+if __name__ == '__main__':
+    sys.exit(main())