Paul Tan <pyoka...@gmail.com> writes:
> For the purpose of applying the patch and committing the results,
> implement extracting the patch data, commit message and authorship from
> an e-mail message using git-mailinfo.
>
> git-mailinfo is run as a separate process, but ideally in the future,
> we should be be able to access its functionality directly without
> spawning a new process.
>
> Helped-by: Junio C Hamano <gits...@pobox.com>
> Helped-by: Jeff King <p...@peff.net>
> Signed-off-by: Paul Tan <pyoka...@gmail.com>
> ---
>
> Notes:
> v2
>
> * use die_errno()
>
> * use '%*d' as the format specifier for msgnum()
>
> builtin/am.c | 228
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 228 insertions(+)
>
> diff --git a/builtin/am.c b/builtin/am.c
> index 7379b97..a1db474 100644
> --- a/builtin/am.c
> +++ b/builtin/am.c
> @@ -9,6 +9,23 @@
> #include "parse-options.h"
> #include "dir.h"
> #include "run-command.h"
> +#include "quote.h"
> +
> +/**
> + * Returns 1 if the file is empty or does not exist, 0 otherwise.
> + */
> +static int is_empty_file(const char *filename)
> +{
> + struct stat st;
> +
> + if (stat(filename, &st) < 0) {
> + if (errno == ENOENT)
> + return 1;
> + die_errno(_("could not stat %s"), filename);
> + }
> +
> + return !st.st_size;
> +}
>
> enum patch_format {
> PATCH_FORMAT_UNKNOWN = 0,
> @@ -23,6 +40,12 @@ struct am_state {
> int cur;
> int last;
>
> + /* commit message and metadata */
> + struct strbuf author_name;
> + struct strbuf author_email;
> + struct strbuf author_date;
> + struct strbuf msg;
> +
> /* number of digits in patch filename */
> int prec;
> };
> @@ -35,6 +58,10 @@ static void am_state_init(struct am_state *state)
> memset(state, 0, sizeof(*state));
>
> strbuf_init(&state->dir, 0);
> + strbuf_init(&state->author_name, 0);
> + strbuf_init(&state->author_email, 0);
> + strbuf_init(&state->author_date, 0);
> + strbuf_init(&state->msg, 0);
> state->prec = 4;
> }
>
> @@ -44,6 +71,10 @@ static void am_state_init(struct am_state *state)
> static void am_state_release(struct am_state *state)
> {
> strbuf_release(&state->dir);
> + strbuf_release(&state->author_name);
> + strbuf_release(&state->author_email);
> + strbuf_release(&state->author_date);
> + strbuf_release(&state->msg);
> }
>
> /**
> @@ -93,6 +124,95 @@ static int read_state_file(struct strbuf *sb, const char
> *file, size_t hint, int
> }
>
> /**
> + * Parses the "author script" `filename`, and sets state->author_name,
> + * state->author_email and state->author_date accordingly. We are strict with
> + * our parsing, as the author script is supposed to be eval'd, and loosely
> + * parsing it may not give the results the user expects.
> + *
> + * The author script is of the format:
> + *
> + * GIT_AUTHOR_NAME='$author_name'
It seems that you have SP * SP TAB GIT_AUTHOR_... here; lose SP
before the TAB?
> + if (!skip_prefix(sb.buf, "GIT_AUTHOR_NAME=", (const char**) &value))
Style:
if (!skip_prefix(sb.buf, "GIT_AUTHOR_NAME=", (const char **)&value))
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