support/scripts/get-developers: add new script

This script, and its companion library, is more-or-less Buildroot's
equivalent to the kernel get_maintainer.pl script: it allows to get the
list of developers to whom a set of patches should be sent to.

To do so, it first relies on a text file, named DEVELOPERS, at the root
of the Buildroot source tree (added in a followup commit) to list the
developers and the files they are interested in. The DEVELOPERS file's
format is simple:

N:     Firstname Lastname <email>
F:     path/to/file
F:     path/to/another/file

This allows to associate developers with the files they are looking
after, be they related to a package, a defconfig, a filesystem image, a
package infrastructure, the documentation, or anything else.

When a directory is given, the tool assumes that the developer handles
all files and subdirectories in this directory. For example
"package/qt5/" can be used for the developers looking after all the Qt5
packages.

Conventional shell patterns can be used, so "package/python-*" can be
used for the developers who want to look after all packages matching
"python-*".

A few files are recognized specially:

 - .mk files are parsed, and if they contain $(eval
   $(<something>-package)), the developer is assumed to be looking after
   the corresponding package. This way, autobuilder failures for this
   package can be reported directly to this developer.

 - arch/Config.in.<arch> files are recognized as "the developer is
   looking after the <arch> architecture". In this case, get-developer
   parses the arch/Config.in.<arch> to get the list of possible BR2_ARCH
   values. This way, autobuilder failures for this package can be
   reported directly to this developer.

 - pkg/pkg-<infra>.mk are recognized as "the developer is looking after
   the <infra> package infrastructure. In this case, any patch that adds
   or touches a .mk file that uses this infrastructure will be sent to
   this developer.

Examples of usage:

$ ./support/scripts/get-developers 0001-ffmpeg-fix-bfin-build.patch
git send-email--to buildroot@buildroot.org --to "Luca Ceresoli <luca@lucaceresoli.net>" --to "Bernd Kuhls <bernd.kuhls@t-online.de>"

$ ./support/scripts/get-developers -p imx-lib
Arnout Vandecappelle <arnout@mind.be>
Gary Bisson <gary.bisson@boundarydevices.com>

$ ./support/scripts/get-developers -a bfin
Waldemar Brodkorb <wbx@openadk.org>

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

1 files changed, 83 insertions, 0 deletions

diff --git a/support/scripts/get-developers b/support/scripts/get-developers
new file mode 100755
index 0000000000..f73512f17a
--- /dev/null
+++ b/support/scripts/get-developers
@@ -0,0 +1,83 @@
+#!/usr/bin/env python
+
+import argparse
+import getdeveloperlib
+
+def parse_args():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('patches', metavar='P', type=str, nargs='*',
+                        help='list of patches')
+    parser.add_argument('-a', dest='architecture', action='store',
+                        help='find developers in charge of this architecture')
+    parser.add_argument('-p', dest='package', action='store',
+                        help='find developers in charge of this package')
+    parser.add_argument('-c', dest='check', action='store_const',
+                        const=True, help='list files not handled by any developer')
+    return parser.parse_args()
+
+def __main__():
+    devs = getdeveloperlib.parse_developers()
+    if devs is None:
+        sys.exit(1)
+    args = parse_args()
+
+    # Check that only one action is given
+    action = 0
+    if args.architecture is not None:
+        action += 1
+    if args.package is not None:
+        action += 1
+    if args.check:
+        action += 1
+    if len(args.patches) != 0:
+        action += 1
+    if action > 1:
+        print("Cannot do more than one action")
+        return
+    if action == 0:
+        print("No action specified")
+        return
+
+    # Handle the check action
+    if args.check:
+        files = getdeveloperlib.check_developers(devs)
+        for f in files:
+            print f
+
+    # Handle the architecture action
+    if args.architecture is not None:
+        for dev in devs:
+            if args.architecture in dev.architectures:
+                print(dev.name)
+        return
+
+    # Handle the package action
+    if args.package is not None:
+        for dev in devs:
+            if args.package in dev.packages:
+                print(dev.name)
+        return
+
+    # Handle the patches action
+    if len(args.patches) != 0:
+        (files, infras) = getdeveloperlib.analyze_patches(args.patches)
+        matching_devs = set()
+        for dev in devs:
+            # See if we have developers matching by package name
+            for f in files:
+                if dev.hasfile(f):
+                    matching_devs.add(dev.name)
+            # See if we have developers matching by package infra
+            for i in infras:
+                if i in dev.infras:
+                    matching_devs.add(dev.name)
+
+        result = "--to buildroot@buildroot.org"
+        for dev in matching_devs:
+            result += " --to \"%s\"" % dev
+
+        if result != "":
+            print("git send-email %s" % result)
+
+__main__()
+