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log: prepare log/log-tree to reuse the diffopt.close_file attribute

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We are about to teach the log-tree machinery to reuse the diffopt.file
field to output to a file stream other than stdout, in line with the
diff machinery already writing to diffopt.file.

However, we might want to write something after the diff in
log_tree_commit() (e.g. with the --show-linear-break option), therefore
we must not let the diff machinery close the file (as per
diffopt.close_file.

This means that log_tree_commit() itself must override the
diffopt.close_file flag and close the file, and if log_tree_commit() is
called in a loop, the caller is responsible to do the same.

Note: format-patch has an `--output-directory` option. Due to the fact
that format-patch's options are parsed first, and that the parse-options
machinery accepts uniquely abbreviated options, the diff options
`--output` (and `-o`) are shadowed. Therefore close_file is not set to 1
so that cmd_format_patch() does *not* need to handle the close_file flag
differently, even if it calls log_tree_commit() in a loop.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin
2016-06-22 17:01:28 +02:00
committed by Junio C Hamano
parent ab7797dbe9
commit 6ea57703f6
2 changed files with 16 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
log-tree.c
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@ -862,11 +862,12 @@ static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log
int log_tree_commit(struct rev_info *opt, struct commit *commit)
{
struct log_info log;
int shown;
int shown, close_file = opt->diffopt.close_file;
log.commit = commit;
log.parent = NULL;
opt->loginfo = &log;
opt->diffopt.close_file = 0;
if (opt->line_level_traverse)
return line_log_print(opt, commit);
@ -883,5 +884,7 @@ int log_tree_commit(struct rev_info *opt, struct commit *commit)
printf("\n%s\n", opt->break_bar);
opt->loginfo = NULL;
maybe_flush_or_die(stdout, "stdout");
if (close_file)
fclose(opt->diffopt.file);
return shown;
}