Commit f97da1f7 authored by Alex Bennée's avatar Alex Bennée
Browse files

docker: docker.py add check sub-command 



This command allows you to check if we need to re-build a docker
image. If the image isn't in the repository or the checksums don't
match then we return false and some text (for processing in
makefiles).

Signed-off-by: default avatarAlex Bennée <alex.bennee@linaro.org>
parent f9172822

tests/docker/docker.py

+37 −1
Original line number Diff line number Diff line
@@ -184,8 +184,14 @@ class Docker(object): 
                                       stderr=subprocess.STDOUT,

                                       **kwargs)



    def inspect_tag(self, tag):

        try:

            return self._output(["inspect", tag])

        except subprocess.CalledProcessError:

            return None



    def get_image_dockerfile_checksum(self, tag):

        resp = self._output(["inspect", tag])

        resp = self.inspect_tag(tag)

        labels = json.loads(resp)[0]["Config"].get("Labels", {})

        return labels.get("com.qemu.dockerfile-checksum", "")
@@ -447,6 +453,36 @@ class CcCommand(SubCommand): 
        return Docker().command("run", cmd, args.quiet)





class CheckCommand(SubCommand):

    """Check if we need to re-build a docker image out of a dockerfile.

    Arguments: <tag> <dockerfile>"""

    name = "check"



    def args(self, parser):

        parser.add_argument("tag",

                            help="Image Tag")

        parser.add_argument("dockerfile",

                            help="Dockerfile name")



    def run(self, args, argv):

        dockerfile = open(args.dockerfile, "rb").read()

        tag = args.tag



        dkr = Docker()

        info = dkr.inspect_tag(tag)

        if info is None:

            print("Image does not exist")

            return 1



        if dkr.image_matches_dockerfile(tag, dockerfile):

            if not args.quiet:

                print("Image is up to date")

            return 0

        else:

            print("Image needs updating")

            return 1





def main():

    parser = argparse.ArgumentParser(description="A Docker helper",

            usage="%s <subcommand> ..." % os.path.basename(sys.argv[0]))