add zipapp support with bundled dependencies (#1491)

Signed-off-by: Bernat Gabor <bgabor8@bloomberg.net>

2 files changed, 22 insertions, 7 deletions

diff --git a/src/virtualenv/util/path/__init__.py b/src/virtualenv/util/path/__init__.py
index ab5db8e..e00acd5 100644
--- a/src/virtualenv/util/path/__init__.py
+++ b/src/virtualenv/util/path/__init__.py
@@ -1,12 +1,7 @@
 from __future__ import absolute_import, unicode_literals
 
 from ._pathlib import Path
+from ._permission import make_exe
 from ._sync import copy, ensure_dir, symlink, symlink_or_copy
 
-__all__ = (
-    "ensure_dir",
-    "symlink_or_copy",
-    "symlink",
-    "copy",
-    "Path",
-)
+__all__ = ("ensure_dir", "symlink_or_copy", "symlink", "copy", "Path", "make_exe")
diff --git a/src/virtualenv/util/path/_permission.py b/src/virtualenv/util/path/_permission.py
new file mode 100644
index 0000000..1356b6d
--- /dev/null
+++ b/src/virtualenv/util/path/_permission.py
@@ -0,0 +1,20 @@
+from __future__ import absolute_import, unicode_literals
+
+from stat import S_IXGRP, S_IXOTH, S_IXUSR
+
+
+def make_exe(filename):
+    original_mode = filename.stat().st_mode
+    levels = [S_IXUSR, S_IXGRP, S_IXOTH]
+    for at in range(len(levels), 0, -1):
+        try:
+            mode = original_mode
+            for level in levels[:at]:
+                mode |= level
+            filename.chmod(mode)
+            break
+        except PermissionError:
+            continue
+
+
+__all__ = ("make_exe",)