zaebaka

README.md

@@ -0,0 +1,23 @@
+# zaebaka
+
+bash cat with a pipe
+
+... or in another words, spawn N processes running someting and kill them when done.
+
+# Usage
+
+```
+$ python zaebaka.py -h
+usage: zaebaka [-h] -s SCRIPT [-c COUNT] [-t TEMPLATE]
+
+bash cat with a pipe
+
+options:
+  -h, --help            show this help message and exit
+  -s, --script SCRIPT   script to run in shell
+  -c, --count COUNT     instances count
+  -t, --template TEMPLATE
+                        template placeholder for instance id substitution
+```
+
+This tool can spawn N processes running specified script and substitute instance number in specific template `{{template}}` or other, if set.

zaebaka.py

@@ -0,0 +1,65 @@
+import subprocess
+import traceback
+import argparse
+import signal
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser(
+        prog='zaebaka',
+        description='bash cat with a pipe',
+    )
+
+    parser.add_argument(
+        '-s',
+        '--script',
+        type=str,
+        required=True,
+        help='script to run in shell',
+    )
+
+    parser.add_argument(
+        '-c',
+        '--count',
+        type=int,
+        default=1,
+        help='instances count',
+    )
+
+    parser.add_argument(
+        '-t',
+        '--template',
+        type=str,
+        default='{{instance}}',
+        help='template placeholder for instance id substitution',
+    )
+
+    args = parser.parse_args()
+
+    processes = []
+
+    def signal_handler(sig, frame):
+        print('Terminaring subprocesses')
+        for process in processes:
+            try:
+                process.terminate()
+            except:
+                traceback.print_exc()
+
+    signal.signal(signal.SIGINT, signal_handler)
+
+    for instance in range(args.count):
+        script = args.script.replace(args.template, str(instance))
+
+        print(f'cmd: `{ script }`')
+        processes.append(
+            subprocess.Popen(
+                script,
+                shell=True,
+                stdout=subprocess.DEVNULL,
+                stderr=subprocess.DEVNULL,
+            )
+        )
+
+    print('Press Ctrl+C to exit')
+    signal.pause()