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hosts/main/bin/direnv-diff

@@ -0,0 +1,44 @@
+#!/usr/bin/env python
+import os
+import subprocess
+import sys
+import shlex
+
+
+def read_env(data):
+    return dict(
+        item.split(b"=", 1)
+        for item in data.split(b"\0")
+        if item
+    )
+
+
+def main():
+    if len(sys.argv) != 2:
+        print(f"Usage: {sys.argv[0]} DIR", file=sys.stderr)
+        return 2
+
+    before = {
+        os.fsencode(k): os.fsencode(v)
+        for k, v in os.environ.items()
+    }
+
+    result = subprocess.run(
+        ["direnv", "exec", sys.argv[1], "env", "-0"],
+        stdout=subprocess.PIPE,
+        check=True,
+    )
+
+    after = read_env(result.stdout)
+
+        
+    for key, value in after.items():
+      if before.get(key) != value:
+        name = os.fsdecode(key)
+        val = os.fsdecode(value)
+        print(f"export {name}={shlex.quote(val)}")
+
+
+
+if __name__ == "__main__":
+    sys.exit(main())