launchers/kvm : python -> sh

qemu/launchers/kvm

@@ -1,34 +1,21 @@
-#!/usr/bin/env python3
+#!/usr/bin/env sh
+set -x
 
-# Set number of vCPUs to use to the environment variable QEMUSH_NPROC or
+# How many CPU cores to use
-# half of total vCPUs installed if it fails
+nproc=$QEMUSH_NPROC
-try:
+[ -z "$nproc" ] && nproc=$(($(nproc) / 2))
-    from os import environ
-    nproc = environ['QEMUSH_NPROC']
-except KeyError:
-    from multiprocessing import cpu_count
-    nproc = str(cpu_count() // 2)
 
-# Set amount of RAM to use to the environment variable QEMUSH_RAM or half
+# How much RAM to use
-# of total RAM installed if it fails
+ram=$QEMUSH_RAM
-try:
+[ -z "$ram" ] && ram=$(($(free | grep '^Mem:\s' | awk '{ print $NF }') / 2))K
-    ram = environ['QEMUSH_RAM']
-except KeyError:
-    from psutil import virtual_memory
-    ram = str(virtual_memory().available // 2 // (1024 ** 2))
 
-# Set the command to initialize; all required parameters to make a sane KVM
+# Set the arguments
-# are included and optional arguments are appended from argv
+set -- qemu-system-x86_64 \
-from sys import argv
+    -enable-kvm \
-command = [
+    -M q35 \
-    'qemu-system-x86_64',
+    -cpu host -smp "$nproc" \
-    '-enable-kvm',
+    -m "$ram" \
-    '-M', 'q35',
+    "$@"
-    '-cpu', 'host', '-smp', nproc,
-    '-m', ram,
-] + argv[1:]
 
-# Print the final command and replace the main process with it
+# Start the machine
-print(command)
+exec "$@"
-from os import execvp
-execvp(command[0], command)