[U-Boot] [PATCH] moveconfig: Add a new --git-ref option

[Masahiro Yamada <yamada.masahiro@socionext.com>]

Hi Joe,


2015-05-30 6:23 GMT+09:00 Joe Hershberger <joe.hershberger@ni.com>:
> This option allows the 'make *_defconfig' step to run against a former
> repo state, while the savedefconfig step runs against the current repo
> state. This is convenient for the case where something in the Kconfig
> has changed such that the defconfig is no longer complete with the new
> Kconfigs. This feature allows the .config to be built assuming those old
> Kconfigs, but then savedefconfig based on the new state of the Kconfigs.
>
> Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>


This idea seems nice, but I have some comments about the implementation.



> +    defconfig_src_dir = ''
> +
> +    if options.git_ref:
> +        work_dir = WorkDir()
> +        defconfig_src_dir = work_dir.get()
> +        cwd = os.getcwd()
> +        print 'Cloning git repo for \'make *_defconfig\' step...'

You can use signle quotes without escape sequences inside "...", and vice versa.





> diff --git a/tools/patman/gitutil.py b/tools/patman/gitutil.py
> index 9e739d8..138f989 100644
> --- a/tools/patman/gitutil.py
> +++ b/tools/patman/gitutil.py
> @@ -61,6 +61,21 @@ def CountCommitsToBranch():
>      patch_count = int(stdout)
>      return patch_count
>
> +def CommitHash(commit_ref):
> +    """Gets the hash for a commit
> +
> +    Args:
> +        commit_ref: Commit ref to look up
> +
> +    Return:
> +        Hash of revision, if any, else None
> +    """
> +    pipe = ['git', 'rev-parse', '--short', commit_ref]
> +    stdout = command.RunPipe([pipe], capture=True, oneline=True).stdout
> +
> +    hash = stdout.strip()
> +    return hash
> +
>  def NameRevision(commit_hash):
>      """Gets the revision name for a commit



Finally, this tool is going to depend on patman.  I am afraid this
tool is getting messy.

gitutils.py depends on command.py, and then command.py depends on
cros_subprocess.py.

Do you really need to invoke such a chain of libraries
to run a sub-process?


For example, you can get a hash in a single line like this:

subprocess.check_output(['git', 'rev-parse', '--short', 'HEAD'])





-- 
Best Regards
Masahiro Yamada