From: Ramkumar Ramachandra <artagnon@gmail.com>
Date: Wed, 06 Jul 2011 08:25:17 GMT
Subject: Re: [PATCH 8/8] vcs-svn: allow to disable 'progress' lines
Message-ID: <CALkWK0nWSVrrtzwE2ePucK=XTnSHWuojxhoayRSUbZmk1We9Fg@mail.gmail.com>
In-Reply-To: <1309715877-13814-9-git-send-email-divanorama@gmail.com>

Hi Dmitry,

Dmitry Ivankov writes:
> vcs-svn/ writes a progress line after each processed revision. It
> is too noisy for big imports. That's a stress for a terminal and
> any other output can be lost or scrolled away among these lines.
>
> For now just add a switch to turn progress lines off:
> $ svn-fe --no-progress ...

Agreed.  Sounds like a good change.

> diff --git a/contrib/svn-fe/svn-fe.c b/contrib/svn-fe/svn-fe.c
> index 32755b1..792ffad 100644
> --- a/contrib/svn-fe/svn-fe.c
> +++ b/contrib/svn-fe/svn-fe.c
> @@ -38,7 +42,7 @@ int main(int argc, const char **argv)
>                url = argv[0];
>        } else if (argc)
>                usage_with_options(svn_fe_usage, svn_fe_options);
> -       if (svndump_init(NULL, url, ref, backflow_fd))
> +       if (svndump_init(NULL, url, ref, backflow_fd, progress))

You're modifying the svndump_init API for every new option that's
added.  This'll clearly break down when you have many options -- how
about wrapping it up in an options structure and then passing that?

> diff --git a/contrib/svn-fe/svn-fe.txt b/contrib/svn-fe/svn-fe.txt
> index a7ad368..f1a459e 100644
> --- a/contrib/svn-fe/svn-fe.txt
> +++ b/contrib/svn-fe/svn-fe.txt
> @@ -39,6 +39,9 @@ OPTIONS
>        Integer number of file descriptor from which
>        responses to 'ls' and 'cat-blob' requests will come.
>        Default is fd=3.
> +--[no-]progress::
> +       Write 'progress' lines to fast-import stream. These
> +       can be displayed by fast-import.

Hm, this will make it a little too silent for the end-user.  What do
you feel about printing something minimalistic like a '.' for each
imported revision?  Atleast it won't look like it's hung.  Also, how
does this interact with the 'progress' option of fast-import protocol?

>  INPUT FORMAT
>  ------------
> diff --git a/test-svn-fe.c b/test-svn-fe.c
> index 7885eb1..e4bfda0 100644
> --- a/test-svn-fe.c
> +++ b/test-svn-fe.c
> @@ -62,7 +62,7 @@ int main(int argc, const char *argv[])
>                return apply_delta(argc, argv);
>
>        if (argc == 1) {
> -               if (svndump_init(argv[0], NULL, ref, backflow_fd))
> +               if (svndump_init(argv[0], NULL, ref, backflow_fd, 1))
>                        return 1;
>                svndump_read();
>                svndump_deinit();
> diff --git a/vcs-svn/fast_export.c b/vcs-svn/fast_export.c
> index cfb0f2b..a8b8603 100644
> --- a/vcs-svn/fast_export.c
> +++ b/vcs-svn/fast_export.c
> @@ -19,6 +19,7 @@ static uint32_t first_commit_done;
>  static struct line_buffer postimage = LINE_BUFFER_INIT;
>  static struct line_buffer report_buffer = LINE_BUFFER_INIT;
>  static struct strbuf ref_name = STRBUF_INIT;
> +static int print_progress;

> @@ -30,9 +31,10 @@ static int init_postimage(void)
>        return buffer_tmpfile_init(&postimage);
>  }
>
> -void fast_export_init(int fd, const char *dst_ref)
> +void fast_export_init(int fd, const char *dst_ref, int progress)
>  {
>        first_commit_done = 0;
> +       print_progress = progress;

The only reason you're modifying the API of fast_export_init is so
that it can set a global static variable?  Also, this change seems
more absurd because progress reporting isn't directly related to
fast_export_init.  How about having a dedicated function for option
parsing that sets all the global statics?

I'm sorry I haven't been more involved with this project.  Still, I
hope this review helps.

-- Ram