[v4,2/4] devtools: add generation of compressed abi dump archives

diff --git a/devtools/gen-abi-tarball.py b/devtools/gen-abi-tarball.py
new file mode 100755
index 000000000..6c337104e
--- /dev/null
+++ b/devtools/gen-abi-tarball.py
@@ -0,0 +1,142 @@ 
+#!/usr/bin/env python3
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2020 Intel Corporation
+
+"""
+This Python script generates a compressed archive containing .dump
+files which can be used to perform ABI breakage checking for the
+build specified in the parameters.
+"""
+
+import os
+from os.path import abspath, realpath, dirname, basename, join, getsize
+import sys
+import argparse
+import platform
+import tarfile
+import subprocess
+import shutil
+import tempfile
+
+# Get command line options
+def args_parse():
+    parser = argparse.ArgumentParser(
+            description='This script is intended to generate ABI dump tarballs\n\n'+
+                        'Supported environmental variables:\n'+
+                        '\t- CC: The required compiler will be determined using this environmental variable.\n',
+            formatter_class=argparse.RawTextHelpFormatter)
+    parser.add_argument(
+            '-t', '--tag', type=str, dest='tag',
+            help='DPDK tag e.g. latest or v20.11', default='latest')
+    parser.add_argument(
+            '-cf', '--cross-file', type=str, dest='crosscompile',
+            help='Set the location of a cross compile config')
+    parser.add_argument(
+            '-a', '--arch', type=str, dest='arch',
+            help='Architecture arm or x86_64', default=platform.machine())
+    args = parser.parse_args()
+    return args
+
+# Function to execute git commands
+def call_git(args):
+    args = list(filter(None, args))
+    git_call = subprocess.run(['git'] + args, capture_output=True)
+    if git_call.returncode != 0:
+        print('ERROR Git returned an error', file=sys.stderr)
+        exit(1)
+    return git_call.stdout.decode('utf-8').strip()
+
+# Function to execute commands
+def call_exec(args):
+    args = list(filter(None, args))
+    exec_call = subprocess.run(args, stdout=subprocess.DEVNULL)
+    if exec_call.returncode != 0:
+        print('ERROR Script returned an error', file=sys.stderr)
+        exit(1)
+
+# Get the required git tag
+def get_tag(tag):
+    tags = call_git(['ls-remote', '--tags', 'http://dpdk.org/git/dpdk']).split('\n')
+    tags = [t.split('/')[-1].strip() for t in tags if 'rc' not in t and not t.endswith('{}')]
+    if tag == 'latest':
+        tag = tags[-1]
+    if tag not in tags:
+        print('ERROR supplied tag does not exist in DPDK repo', file=sys.stderr)
+        exit(1)
+    return tag
+
+def main():
+    args = args_parse()
+
+    # Get the cross-compile option
+    cross_comp_meson = [None, None]
+    if args.crosscompile:
+        cross_comp_meson = ['--cross-file', abspath(args.crosscompile)]
+
+    tag = get_tag(args.tag)
+
+    # Get the specified compiler from system
+    if 'CC' in os.environ:
+        comp = os.environ['CC']
+    else:
+        print('No compiler specified in environmental varibles, setting CC=gcc')
+        comp = 'gcc'
+        os.environ['CC'] = 'gcc'
+
+    # Print the configuration to the user
+    print('\nSelected Build: {}, Compiler: {}, Architecture: {}, Cross Compile: {}'.format(tag,comp,args.arch,cross_comp_meson[1]))
+
+    # Store the users working directory
+    baseDir = os.getcwd()
+    # Store devtools dir
+    devtoolsDir = abspath(dirname(realpath(sys.argv[0])))
+
+    # Create directory for DPDK git repo and build
+    tmpDir = tempfile.TemporaryDirectory(dir = "/tmp")
+
+    os.chdir(tmpDir.name)
+    # Clone DPDK and switch to specified tag
+    print('Cloning {} from DPDK git'.format(tag))
+    call_git(['clone', '--quiet', 'http://dpdk.org/git/dpdk'])
+    os.chdir('dpdk')
+    call_git(['checkout', '--quiet', tag])
+
+    # Create build folder with meson and set debug build and cross compile (if needed)
+    print('Configuring Meson')
+    call_exec(['meson', '-Dbuildtype=debug', 'dumpbuild'] + cross_comp_meson)
+    #os.system('meson -Dbuildtype=debug dumpbuild {} >/dev/null'.format(cross_comp_meson))
+    print('Building DPDK . . .')
+    #Build DPDK with ninja
+    call_exec(['ninja', '-C', 'dumpbuild'])
+
+    # Create dump files and output to dump directory
+    dumpDir = join(baseDir,'{}-{}-{}-abi_dump'.format(tag,comp,args.arch))
+    print('Generating ABI dump files')
+    call_exec([join(devtoolsDir,'gen-abi.sh'), 'dumpbuild'])
+    try:
+        shutil.copytree('dumpbuild/dump', dumpDir)
+    except FileExistsError as error:
+        print('ERROR The {} directory already exists, ensure it is not present before running script'.format(dumpDir), file=sys.stderr)
+        tmpDir.cleanup()
+        exit(1)
+
+    # Compress the dump directory
+    print('Creating Tarball of dump files')
+    os.chdir(baseDir)
+    origSize = 0
+    for f in os.scandir(dumpDir):
+        origSize += getsize(f)
+    with tarfile.open('{}.tar.gz'.format(dumpDir), "w:gz") as tar:
+        tar.add(dumpDir, arcname=basename(dumpDir))
+    newSize = getsize('{}.tar.gz'.format(dumpDir))
+
+    # Remove all temporary directories
+    print('Cleaning up temporary directories')
+    shutil.rmtree(dumpDir)
+    tmpDir.cleanup()
+
+    #Print output of the script to the user
+    print('\nDump of DPDK ABI {} is available in {}.tar.gz (Original Size: {:.1f}MB, Compressed Size: {:.1f}MB)\n'.format(tag,dumpDir.split('/')[-1],float(origSize)*1e-6,float(newSize)*1e-6))
+
+if __name__ == "__main__":
+    main()