"Michael S. Tsirkin" <mst@xxxxxxxxxx> writes:
> it's sometimes useful to be able to pass output message of
> git-mailinfo through git-interpret-trailers,
> but that creates problems since that does not
> include the subject and an empty line after that,
> making interpret-trailers add an empty line.
>
> Add a flag to bypass adding the blank line.
I think I understand what you are trying to do, but using output
that comes from 'mailinfo' alone as the input to anything (including
interpret-trailers) does not make much sense.
If you use the mailinfo output in the way it is expected to be used,
i.e. take the subject from the "info" that goes to its standard
output and append the "msg" with a blank between them, and feed the
result to interpret-trailers, do you still need this step in your
series?
>
> Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
> ---
> trailer.h | 2 +-
> builtin/interpret-trailers.c | 9 +++++++--
> trailer.c | 10 +++++++---
> 3 files changed, 15 insertions(+), 6 deletions(-)
>
> diff --git a/trailer.h b/trailer.h
> index 36b40b8..afcf680 100644
> --- a/trailer.h
> +++ b/trailer.h
> @@ -2,6 +2,6 @@
> #define TRAILER_H
>
> void process_trailers(const char *file, int in_place, int trim_empty,
> - struct string_list *trailers);
> + int suppress_blank_line, struct string_list *trailers);
>
> #endif /* TRAILER_H */
> diff --git a/builtin/interpret-trailers.c b/builtin/interpret-trailers.c
> index 18cf640..4a92788 100644
> --- a/builtin/interpret-trailers.c
> +++ b/builtin/interpret-trailers.c
> @@ -18,11 +18,14 @@ static const char * const git_interpret_trailers_usage[] = {
>
> int cmd_interpret_trailers(int argc, const char **argv, const char *prefix)
> {
> + int suppress_blank_line = 0;
> int in_place = 0;
> int trim_empty = 0;
> struct string_list trailers = STRING_LIST_INIT_DUP;
>
> struct option options[] = {
> + OPT_BOOL(0, "suppress-blank-line", &suppress_blank_line,
> + N_("suppress prefixing tailer(s) with a blank line ")),
> OPT_BOOL(0, "in-place", &in_place, N_("edit files in place")),
> OPT_BOOL(0, "trim-empty", &trim_empty, N_("trim empty trailers")),
> OPT_STRING_LIST('t', "trailer", &trailers, N_("trailer"),
> @@ -36,11 +39,13 @@ int cmd_interpret_trailers(int argc, const char **argv, const char *prefix)
> if (argc) {
> int i;
> for (i = 0; i < argc; i++)
> - process_trailers(argv[i], in_place, trim_empty, &trailers);
> + process_trailers(argv[i], in_place, trim_empty,
> + suppress_blank_line, &trailers);
> } else {
> if (in_place)
> die(_("no input file given for in-place editing"));
> - process_trailers(NULL, in_place, trim_empty, &trailers);
> + process_trailers(NULL, in_place, trim_empty,
> + suppress_blank_line, &trailers);
> }
>
> string_list_clear(&trailers, 0);
> diff --git a/trailer.c b/trailer.c
> index 8e48a5c..8e5be91 100644
> --- a/trailer.c
> +++ b/trailer.c
> @@ -805,6 +805,7 @@ static void print_lines(FILE *outfile, struct strbuf **lines, int start, int end
>
> static int process_input_file(FILE *outfile,
> struct strbuf **lines,
> + int suppress_blank_line,
> struct trailer_item **in_tok_first,
> struct trailer_item **in_tok_last)
> {
> @@ -822,7 +823,8 @@ static int process_input_file(FILE *outfile,
> /* Print lines before the trailers as is */
> print_lines(outfile, lines, 0, trailer_start);
>
> - if (!has_blank_line_before(lines, trailer_start - 1))
> + if (!suppress_blank_line &&
> + !has_blank_line_before(lines, trailer_start - 1))
> fprintf(outfile, "\n");
>
> /* Parse trailer lines */
> @@ -875,7 +877,8 @@ static FILE *create_in_place_tempfile(const char *file)
> return outfile;
> }
>
> -void process_trailers(const char *file, int in_place, int trim_empty, struct string_list *trailers)
> +void process_trailers(const char *file, int in_place, int trim_empty,
> + int suppress_blank_line, struct string_list *trailers)
> {
> struct trailer_item *in_tok_first = NULL;
> struct trailer_item *in_tok_last = NULL;
> @@ -894,7 +897,8 @@ void process_trailers(const char *file, int in_place, int trim_empty, struct str
> outfile = create_in_place_tempfile(file);
>
> /* Print the lines before the trailers */
> - trailer_end = process_input_file(outfile, lines, &in_tok_first, &in_tok_last);
> + trailer_end = process_input_file(outfile, lines, suppress_blank_line,
> + &in_tok_first, &in_tok_last);
>
> arg_tok_first = process_command_line_args(trailers);
--
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