From 1af3d97751ef28d276eb1336a2052771efe09894 Mon Sep 17 00:00:00 2001 From: Jeff King Date: Fri, 15 Jun 2012 16:29:48 -0400 Subject: fix pager.diff with diff --no-index git-diff does not rely on the git wrapper to setup its pager; instead, it sets it up on its own after seeing whether --quiet or --exit-code has been specified. After diff_no_index was split off from cmd_diff, commit b3fde6c (git diff --no-index: default to page like other diff frontends, 2008-05-26) duplicated the one-liner from cmd_diff to turn on the pager. Later, commit 8f0359f (Allow pager of diff command be enabled/disabled, 2008-07-21) taught the the version in cmd_diff to respect the pager.diff config, but the version in diff_no_index was left behind. This meant that git -c pager.diff=0 diff a b would not use a pager, but git -c pager.diff=0 diff --no-index a b would. Let's fix it by factoring out a common function. While we're there, let's update the antiquated comment, which claims that the pager interferes with propagating the exit code; this has not been the case since ea27a18 (spawn pager via run_command interface, 2008-07-22). Signed-off-by: Jeff King Signed-off-by: Junio C Hamano --- builtin.h | 2 ++ builtin/diff.c | 24 +++++++++++++++++------- diff-no-index.c | 7 +------ 3 files changed, 20 insertions(+), 13 deletions(-) diff --git a/builtin.h b/builtin.h index 857b9c8aa8..999ba3be7c 100644 --- a/builtin.h +++ b/builtin.h @@ -41,6 +41,8 @@ int copy_note_for_rewrite(struct notes_rewrite_cfg *c, void finish_copy_notes_for_rewrite(struct notes_rewrite_cfg *c); extern int check_pager_config(const char *cmd); +struct diff_options; +extern void setup_diff_pager(struct diff_options *); extern int textconv_object(const char *path, unsigned mode, const unsigned char *sha1, char **buf, unsigned long *buf_size); diff --git a/builtin/diff.c b/builtin/diff.c index 9069dc41be..da8f6aac2b 100644 --- a/builtin/diff.c +++ b/builtin/diff.c @@ -304,13 +304,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix) DIFF_OPT_SET(&rev.diffopt, RECURSIVE); - /* - * If the user asked for our exit code then don't start a - * pager or we would end up reporting its exit code instead. - */ - if (!DIFF_OPT_TST(&rev.diffopt, EXIT_WITH_STATUS) && - check_pager_config("diff") != 0) - setup_pager(); + setup_diff_pager(&rev.diffopt); /* * Do we have --cached and not have a pending object, then @@ -421,3 +415,19 @@ int cmd_diff(int argc, const char **argv, const char *prefix) refresh_index_quietly(); return result; } + +void setup_diff_pager(struct diff_options *opt) +{ + /* + * If the user asked for our exit code, then either they want --quiet + * or --exit-code. We should definitely not bother with a pager in the + * former case, as we will generate no output. Since we still properly + * report our exit code even when a pager is run, we _could_ run a + * pager with --exit-code. But since we have not done so historically, + * and because it is easy to find people oneline advising "git diff + * --exit-code" in hooks and other scripts, we do not do so. + */ + if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && + check_pager_config("diff") != 0) + setup_pager(); +} diff --git a/diff-no-index.c b/diff-no-index.c index f0b0010aed..fc1decdf38 100644 --- a/diff-no-index.c +++ b/diff-no-index.c @@ -224,12 +224,7 @@ void diff_no_index(struct rev_info *revs, } } - /* - * If the user asked for our exit code then don't start a - * pager or we would end up reporting its exit code instead. - */ - if (!DIFF_OPT_TST(&revs->diffopt, EXIT_WITH_STATUS)) - setup_pager(); + setup_diff_pager(&revs->diffopt); if (prefix) { int len = strlen(prefix); -- cgit v1.2.3 From af63b543ed9f7d606cdd2c7a3bcded4e2dc8dad4 Mon Sep 17 00:00:00 2001 From: Jeff King Date: Fri, 15 Jun 2012 16:32:55 -0400 Subject: do not run pager with diff --no-index --quiet There is no point in running a pager when --quiet is given, since we are producing no output. The regular diff code path handles this already, because --quiet implies --exit-code, and we check for --exit-code when deciding not to run the pager. However, the "quiet implies exit-code" logic is done in diff_setup_done, and the no-index code path sets up its pager before running diff_setup_done, and misses this case. We can fix this by reordering our initialization. Currently we do: 1. read command line arguments into diff_options 2. Set pager if EXIT_CODE not requested 3. always set EXIT_CODE, since we are emulating traditional diff 4. call diff_setup_done We can fix the problem by moving pager initialization (step 2) after step 4. But step 3 must come after step 2 (since we want to know whether the _user_ requested --exit-code, not whether we turned it on unconditionally). So we must move both. Signed-off-by: Jeff King Signed-off-by: Junio C Hamano --- diff-no-index.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/diff-no-index.c b/diff-no-index.c index fc1decdf38..77667b810d 100644 --- a/diff-no-index.c +++ b/diff-no-index.c @@ -224,8 +224,6 @@ void diff_no_index(struct rev_info *revs, } } - setup_diff_pager(&revs->diffopt); - if (prefix) { int len = strlen(prefix); const char *paths[3]; @@ -250,13 +248,15 @@ void diff_no_index(struct rev_info *revs, if (!revs->diffopt.output_format) revs->diffopt.output_format = DIFF_FORMAT_PATCH; - DIFF_OPT_SET(&revs->diffopt, EXIT_WITH_STATUS); DIFF_OPT_SET(&revs->diffopt, NO_INDEX); revs->max_count = -2; if (diff_setup_done(&revs->diffopt) < 0) die("diff_setup_done failed"); + setup_diff_pager(&revs->diffopt); + DIFF_OPT_SET(&revs->diffopt, EXIT_WITH_STATUS); + if (queue_diff(&revs->diffopt, revs->diffopt.pathspec.raw[0], revs->diffopt.pathspec.raw[1])) exit(1); -- cgit v1.2.3