add blockpipe

1 files changed, 16 insertions, 0 deletions

diff --git a/blockpipe b/blockpipe
new file mode 100755
index 0000000..dba4f45
--- /dev/null
+++ b/blockpipe
@@ -0,0 +1,16 @@
+#!/usr/bin/env python3
+
+import re
+import sys
+import subprocess
+
+print(
+    re.sub(
+        r"^(```+)\$ (.*)\n((?:.+\n)*)\1$",
+        lambda m: subprocess.check_output(
+            m.group(2), input=m.group(3), shell=True, encoding="utf-8"
+        ),
+        sys.stdin.read(),
+        flags=re.MULTILINE,
+    )
+)