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build: convert the run script to use Python

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This fits with the goal of eliminating non-Python scripting languages,
and makes forthcoming changes far easier.

Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2021-03-18 17:51:49 +00:00
parent caaadd28a1
commit d9dd94711d
1 changed files with 26 additions and 19 deletions
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45
run.in
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@ -1,6 +1,6 @@
#!/bin/sh
#!/usr/bin/env python3
# libvirt 'run' programs locally script
# Copyright (C) 2012-2013 Red Hat, Inc.
# Copyright (C) 2012-2021 Red Hat, Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
@ -40,35 +40,42 @@
#
#----------------------------------------------------------------------
import os
import os.path
import random
import sys
# Function to intelligently prepend a path to an environment variable.
# See https://stackoverflow.com/a/9631350
prepend()
{
eval $1="$2\${$1:+:\$$1}"
}
def prepend(env, varname, extradir):
if varname in os.environ:
env[varname] = extradir + ":" + env[varname]
else:
env[varname] = extradir
# Find this script.
b=@abs_builddir@
here = "@abs_builddir@"
prepend LD_LIBRARY_PATH "$b/src"
export LD_LIBRARY_PATH
if len(sys.argv) < 2:
print("syntax: %s BINARY [ARGS...]" % sys.argv[0], file=sys.stderr)
sys.exit(1)
prepend PKG_CONFIG_PATH "$b/src"
export PKG_CONFIG_PATH
prog = sys.argv[1]
args = sys.argv[1:]
env = os.environ
prepend PATH "$b/tools"
export PATH
prepend(env, "LD_LIBRARY_PATH", os.path.join(here, "src"))
prepend(env, "PKG_CONFIG_PATH", os.path.join(here, "src"))
prepend(env, "PATH", os.path.join(here, "tools"))
# Ensure that any 3rd party apps using libvirt.so from the build tree get
# files resolved to the build/source tree too. Typically useful for language
# bindings running tests against non-installed libvirt.
LIBVIRT_DIR_OVERRIDE=1
export LIBVIRT_DIR_OVERRIDE
env["LIBVIRT_DIR_OVERRIDE"] = "1"
# This is a cheap way to find some use-after-free and uninitialized
# read problems when using glibc.
random_val="$(awk 'BEGIN{srand(); print 1+int(255*rand())}' < /dev/null)"
export MALLOC_PERTURB_=$random_val
env["MALLOC_PERTURB_"] = "%d" % random.randint(1, 255)
# Run the program.
exec "$@"
os.execvpe(prog, args, env)