1 files changed, 78 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/build-support/vm/windows/cygwin-iso/mkclosure.py b/nixpkgs/pkgs/build-support/vm/windows/cygwin-iso/mkclosure.py
new file mode 100644
index 000000000000..4c0d67c43bac
--- /dev/null
+++ b/nixpkgs/pkgs/build-support/vm/windows/cygwin-iso/mkclosure.py
@@ -0,0 +1,78 @@
+# Ugliest Python code I've ever written. -- aszlig
+import sys
+
+def get_plist(path):
+    in_pack = False
+    in_str = False
+    current_key = None
+    buf = ""
+    packages = {}
+    package_name = None
+    package_attrs = {}
+    with open(path, 'r') as setup:
+        for line in setup:
+            if in_str and line.rstrip().endswith('"'):
+                package_attrs[current_key] = buf + line.rstrip()[:-1]
+                in_str = False
+                continue
+            elif in_str:
+                buf += line
+                continue
+
+            if line.startswith('@'):
+                in_pack = True
+                package_name = line[1:].strip()
+                package_attrs = {}
+            elif in_pack and ':' in line:
+                key, value = line.split(':', 1)
+                if value.lstrip().startswith('"'):
+                    if value.lstrip()[1:].rstrip().endswith('"'):
+                        value = value.strip().strip('"')
+                    else:
+                        in_str = True
+                        current_key = key.strip().lower()
+                        buf = value.lstrip()[1:]
+                        continue
+                package_attrs[key.strip().lower()] = value.strip()
+            elif in_pack:
+                in_pack = False
+                packages[package_name] = package_attrs
+    return packages
+
+def main():
+    packages = get_plist(sys.argv[1])
+    to_include = set()
+
+    def traverse(package):
+        to_include.add(package)
+        attrs = packages.get(package, {})
+        deps = attrs.get('requires', '').split()
+        for new_dep in set(deps) - to_include:
+            traverse(new_dep)
+
+    map(traverse, sys.argv[2:])
+
+    sys.stdout.write('[\n')
+    for package, attrs in packages.iteritems():
+        if package not in to_include:
+            cats = [c.lower() for c in attrs.get('category', '').split()]
+            if 'base' not in cats:
+                continue
+
+        install_line = attrs.get('install')
+        if install_line is None:
+            continue
+
+        url, size, hash = install_line.split(' ', 2)
+
+        pack = [
+            '  {',
+            '    url = "{0}";'.format(url),
+            '    hash = "{0}";'.format(hash),
+            '  }',
+        ];
+        sys.stdout.write('\n'.join(pack) + '\n')
+    sys.stdout.write(']\n')
+
+if __name__ == '__main__':
+    main()