[dpdk-dev] [PATCH v3] build: allow using wildcards to disable drivers

[Bruce Richardson <bruce.richardson@intel.com>]

Rather than having to explicitly list each and every driver to disable in a
build, we can use a small python script and the python glob library to
expand out the wildcards. This means that we can configure meson using e.g.

    meson -Ddisable_drivers=crypto/*,event/* build

to do a build omitting all the crypto and event drivers. Explicitly
specified drivers e.g. net/i40e, work as before, and can be mixed with
wildcarded drivers as required.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---

V3:
- added check for correct number of params
- replaced list comprehension with loops for simplicity
- allow running without meson environmental vars set (for easier testing)

V2:
- fixed file suffix
- since it's being called from meson, make this python3 only
- remove use of chdir()
- use '\n' rather than ',' between entries
---
 buildtools/list-dir-globs.py | 21 +++++++++++++++++++++
 buildtools/meson.build       |  2 +-
 drivers/meson.build          |  3 ++-
 3 files changed, 24 insertions(+), 2 deletions(-)
 create mode 100755 buildtools/list-dir-globs.py

diff --git a/buildtools/list-dir-globs.py b/buildtools/list-dir-globs.py
new file mode 100755
index 000000000..b9a536869
--- /dev/null
+++ b/buildtools/list-dir-globs.py
@@ -0,0 +1,21 @@
+#! /usr/bin/env python3
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2020 Intel Corporation
+
+import sys
+import os
+from glob import iglob
+from os.path import join, relpath, isdir
+
+if len(sys.argv) != 2:
+  print("Usage: {0} <path-glob>[,<path-glob>[,...]]".format(sys.argv[0]))
+  sys.exit(1)
+
+root = '.'
+if 'MESON_SOURCE_ROOT' in os.environ and 'MESON_SUBDIR' in os.environ:
+  root = join(os.environ['MESON_SOURCE_ROOT'], os.environ['MESON_SUBDIR'])
+
+for path in sys.argv[1].split(','):
+  for p in iglob(join(root, path)):
+    if isdir(p):
+      print(relpath(p))
diff --git a/buildtools/meson.build b/buildtools/meson.build
index cd1d05403..0f563d89a 100644
--- a/buildtools/meson.build
+++ b/buildtools/meson.build
@@ -4,7 +4,7 @@
 subdir('pmdinfogen')
 
 pmdinfo = find_program('gen-pmdinfo-cfile.sh')
-
+list_dir_globs = find_program('list-dir-globs.py')
 check_experimental_syms = find_program('check-experimental-syms.sh')
 
 # set up map-to-def script using python, either built-in or external
diff --git a/drivers/meson.build b/drivers/meson.build
index 29708cc2b..3ee998d80 100644
--- a/drivers/meson.build
+++ b/drivers/meson.build
@@ -17,7 +17,8 @@ dpdk_driver_classes = ['common',
 	       'event',   # depends on common, bus, mempool and net.
 	       'baseband'] # depends on common and bus.
 
-disabled_drivers = get_option('disable_drivers').split(',')
+disabled_drivers = run_command(list_dir_globs, get_option('disable_drivers'),
+		).stdout().split()
 
 default_cflags = machine_args
 if cc.has_argument('-Wno-format-truncation')
-- 
2.20.1