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author | René Scharfe <rene.scharfe@lsrfire.ath.cx> | 2008-12-28 18:45:32 (GMT) |
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committer | Junio C Hamano <gitster@pobox.com> | 2008-12-29 09:05:21 (GMT) |
commit | 6d0e674a575421347abe5749e645ca6dc78c8207 (patch) | |
tree | 520bca6d03fe6bf525d218ea4d28805285f1e070 | |
parent | 159c88e5ae95c5b02298193c1658fac5919c8012 (diff) | |
download | git-6d0e674a575421347abe5749e645ca6dc78c8207.zip git-6d0e674a575421347abe5749e645ca6dc78c8207.tar.gz git-6d0e674a575421347abe5749e645ca6dc78c8207.tar.bz2 |
diff: add option to show context between close hunks
Merge two hunks if there is only the specified number of otherwise unshown
context between them. For --inter-hunk-context=1, the resulting patch has
the same number of lines but shows uninterrupted context instead of a
context header line in between.
Patches generated with this option are easier to read but are also more
likely to conflict if the file to be patched contains other changes.
This patch keeps the default for this option at 0. It is intended to just
make the feature available in order to see its advantages and downsides.
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r-- | Documentation/diff-options.txt | 4 | ||||
-rwxr-xr-x | contrib/completion/git-completion.bash | 2 | ||||
-rw-r--r-- | diff.c | 4 | ||||
-rw-r--r-- | diff.h | 1 | ||||
-rwxr-xr-x | t/t4032-diff-inter-hunk-context.sh | 92 | ||||
-rw-r--r-- | xdiff/xdiff.h | 1 | ||||
-rw-r--r-- | xdiff/xemit.c | 3 |
7 files changed, 106 insertions, 1 deletions
diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt index c62b45c..c7fcc80 100644 --- a/Documentation/diff-options.txt +++ b/Documentation/diff-options.txt @@ -215,6 +215,10 @@ endif::git-format-patch[] -w:: Shorthand for "--ignore-all-space". +--inter-hunk-context=<lines>:: + Show the context between diff hunks, up to the specified number + of lines, thereby fusing hunks that are close to each other. + --exit-code:: Make the program exit with codes similar to diff(1). That is, it exits with 1 if there were differences and diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash index e004549..a046441 100755 --- a/contrib/completion/git-completion.bash +++ b/contrib/completion/git-completion.bash @@ -776,6 +776,7 @@ _git_diff () --no-ext-diff --no-prefix --src-prefix= --dst-prefix= --base --ours --theirs + --inter-hunk-context= " return ;; @@ -967,6 +968,7 @@ _git_log () --color-words --walk-reflogs --parents --children --full-history --merge + --inter-hunk-context= " return ;; @@ -1469,6 +1469,7 @@ static void builtin_diff(const char *name_a, ecbdata.file = o->file; xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts; xecfg.ctxlen = o->context; + xecfg.interhunkctxlen = o->interhunkcontext; xecfg.flags = XDL_EMIT_FUNCNAMES; if (pe) xdiff_set_find_func(&xecfg, pe->pattern, pe->cflags); @@ -2538,6 +2539,9 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac) options->b_prefix = arg + 13; else if (!strcmp(arg, "--no-prefix")) options->a_prefix = options->b_prefix = ""; + else if (opt_arg(arg, '\0', "inter-hunk-context", + &options->interhunkcontext)) + ; else if (!prefixcmp(arg, "--output=")) { options->file = fopen(arg + strlen("--output="), "w"); options->close_file = 1; @@ -78,6 +78,7 @@ struct diff_options { const char *a_prefix, *b_prefix; unsigned flags; int context; + int interhunkcontext; int break_opt; int detect_rename; int skip_stat_unmatch; diff --git a/t/t4032-diff-inter-hunk-context.sh b/t/t4032-diff-inter-hunk-context.sh new file mode 100755 index 0000000..e4e3e28 --- /dev/null +++ b/t/t4032-diff-inter-hunk-context.sh @@ -0,0 +1,92 @@ +#!/bin/sh + +test_description='diff hunk fusing' + +. ./test-lib.sh + +f() { + echo $1 + i=1 + while test $i -le $2 + do + echo $i + i=$(expr $i + 1) + done + echo $3 +} + +t() { + case $# in + 4) hunks=$4; cmd="diff -U$3";; + 5) hunks=$5; cmd="diff -U$3 --inter-hunk-context=$4";; + esac + label="$cmd, $1 common $2" + file=f$1 + expected=expected.$file.$3.$hunks + + if ! test -f $file + then + f A $1 B >$file + git add $file + git commit -q -m. $file + f X $1 Y >$file + fi + + test_expect_success "$label: count hunks ($hunks)" " + test $(git $cmd $file | grep '^@@ ' | wc -l) = $hunks + " + + test -f $expected && + test_expect_success "$label: check output" " + git $cmd $file | grep -v '^index ' >actual && + test_cmp $expected actual + " +} + +cat <<EOF >expected.f1.0.1 || exit 1 +diff --git a/f1 b/f1 +--- a/f1 ++++ b/f1 +@@ -1,3 +1,3 @@ +-A ++X + 1 +-B ++Y +EOF + +cat <<EOF >expected.f1.0.2 || exit 1 +diff --git a/f1 b/f1 +--- a/f1 ++++ b/f1 +@@ -1 +1 @@ +-A ++X +@@ -3 +3 @@ A +-B ++Y +EOF + +# common lines ctx intrctx hunks +t 1 line 0 2 +t 1 line 0 0 2 +t 1 line 0 1 1 +t 1 line 0 2 1 +t 1 line 1 1 + +t 2 lines 0 2 +t 2 lines 0 0 2 +t 2 lines 0 1 2 +t 2 lines 0 2 1 +t 2 lines 1 1 + +t 3 lines 1 2 +t 3 lines 1 0 2 +t 3 lines 1 1 1 +t 3 lines 1 2 1 + +t 9 lines 3 2 +t 9 lines 3 2 2 +t 9 lines 3 3 1 + +test_done diff --git a/xdiff/xdiff.h b/xdiff/xdiff.h index 84fff58..361f802 100644 --- a/xdiff/xdiff.h +++ b/xdiff/xdiff.h @@ -84,6 +84,7 @@ typedef long (*find_func_t)(const char *line, long line_len, char *buffer, long typedef struct s_xdemitconf { long ctxlen; + long interhunkctxlen; unsigned long flags; find_func_t find_func; void *find_func_priv; diff --git a/xdiff/xemit.c b/xdiff/xemit.c index 4625c1b..05bfa41 100644 --- a/xdiff/xemit.c +++ b/xdiff/xemit.c @@ -59,9 +59,10 @@ static int xdl_emit_record(xdfile_t *xdf, long ri, char const *pre, xdemitcb_t * */ xdchange_t *xdl_get_hunk(xdchange_t *xscr, xdemitconf_t const *xecfg) { xdchange_t *xch, *xchp; + long max_common = 2 * xecfg->ctxlen + xecfg->interhunkctxlen; for (xchp = xscr, xch = xscr->next; xch; xchp = xch, xch = xch->next) - if (xch->i1 - (xchp->i1 + xchp->chg1) > 2 * xecfg->ctxlen) + if (xch->i1 - (xchp->i1 + xchp->chg1) > max_common) break; return xchp; |