Add the ability for the -G<regex> pickaxe to search only through added or removed lines in the diff, or even through an arbitrary amount of context lines when combined with -U<n>.
This has been requested[1][2] a few times in the past, and isn't currently possible. Instead users need to do -G<regex> and then write their own post-parsing script to see if the <regex> matched added or removed lines, or both. There was no way to match the adjacent context lines other than running and grepping the equivalent of a "log -p -U<n>". 1. https://public-inbox.org/git/[email protected]/ 2. https://public-inbox.org/git/[email protected]/ Signed-off-by: Ævar Arnfjörð Bjarmason <[email protected]> --- Documentation/diff-options.txt | 17 +++++++++++++ diff.c | 3 +++ diff.h | 2 ++ diffcore-pickaxe.c | 34 ++++++++++++++++++++++--- t/t4013-diff-various.sh | 1 + t/t4209-log-pickaxe.sh | 45 ++++++++++++++++++++++++++++++++++ 6 files changed, 98 insertions(+), 4 deletions(-) diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt index 09faee3b44..f367b40362 100644 --- a/Documentation/diff-options.txt +++ b/Documentation/diff-options.txt @@ -579,6 +579,9 @@ occurrences of that string did not change). Unless `--text` is supplied patches of binary files without a textconv filter will be ignored. + +When `--pickaxe-raw-diff` is supplied the whole diff is searched +instead of just added/removed lines. See below. ++ See the 'pickaxe' entry in linkgit:gitdiffcore[7] for more information. @@ -600,6 +603,20 @@ The object can be a blob or a submodule commit. It implies the `-t` option in Treat the <string> given to `-S` as an extended POSIX regular expression to match. +--pickaxe-raw-diff:: + When `-G` looks for a change a diff will be generated, and + only the added/removed lines will be matched against with the + "+" or "-" stripped. ++ +Supplying this option skips that pre-processing. This makes it +possible to match only lines that added or removed something matching +a <regex> with "\^\+<regex>" and "^-<regex>", respectively. ++ +It also allows for finding something in the diff context. E.g. "\^ +<regex>" will match the context lines (see `-U<n>` above) around the +added/removed lines, and doing an unanchored match will match any of +the the added/removed lines & diff context. + endif::git-format-patch[] -O<orderfile>:: diff --git a/diff.c b/diff.c index 4d3cf83a27..4cdc000ee5 100644 --- a/diff.c +++ b/diff.c @@ -5503,6 +5503,9 @@ static void prep_parse_options(struct diff_options *options) OPT_BIT_F(0, "pickaxe-regex", &options->pickaxe_opts, N_("treat <string> in -S as extended POSIX regular expression"), DIFF_PICKAXE_REGEX, PARSE_OPT_NONEG), + OPT_BIT_F(0, "pickaxe-raw-diff", &options->pickaxe_opts, + N_("have <string> in -G match the raw diff output"), + DIFF_PICKAXE_G_RAW_DIFF, PARSE_OPT_NONEG), OPT_FILENAME('O', NULL, &options->orderfile, N_("control the order in which files appear in the output")), OPT_CALLBACK_F(0, "find-object", options, N_("<object-id>"), diff --git a/diff.h b/diff.h index b20cbcc091..d431fbc602 100644 --- a/diff.h +++ b/diff.h @@ -370,6 +370,8 @@ int git_config_rename(const char *var, const char *value); DIFF_PICKAXE_KIND_OBJFIND) #define DIFF_PICKAXE_IGNORE_CASE 32 +#define DIFF_PICKAXE_G_RAW_DIFF 64 + void diffcore_std(struct diff_options *); void diffcore_fix_diff_index(void); diff --git a/diffcore-pickaxe.c b/diffcore-pickaxe.c index 3c6416bfe2..e23f04b4f0 100644 --- a/diffcore-pickaxe.c +++ b/diffcore-pickaxe.c @@ -17,14 +17,18 @@ typedef int (*pickaxe_fn)(mmfile_t *one, mmfile_t *two, struct diffgrep_cb { regex_t *regexp; int hit; + int raw_diff; }; static void diffgrep_consume(void *priv, char *line, unsigned long len) { struct diffgrep_cb *data = priv; regmatch_t regmatch; + int raw_diff = data->raw_diff; + const char *string = raw_diff ? line : line + 1; + size_t size = raw_diff ? len : len - 1; - if (line[0] != '+' && line[0] != '-') + if (!raw_diff && line[0] != '+' && line[0] != '-') return; if (data->hit) /* @@ -32,7 +36,7 @@ static void diffgrep_consume(void *priv, char *line, unsigned long len) * caller early. */ return; - data->hit = !regexec_buf(data->regexp, line + 1, len - 1, 1, + data->hit = !regexec_buf(data->regexp, string, size, 1, ®match, 0); } @@ -44,15 +48,36 @@ static int diff_grep(mmfile_t *one, mmfile_t *two, struct diffgrep_cb ecbdata; xpparam_t xpp; xdemitconf_t xecfg; + int raw_diff = o->pickaxe_opts & DIFF_PICKAXE_G_RAW_DIFF; + struct strbuf sb = STRBUF_INIT; + char *string; + size_t size; if (!one || !two) { mmfile_t *which = one ? one : two; int ret; - char *string = which->ptr; - size_t size = which->size; assert(!(!one && !two)); + if (raw_diff) { + /* + * When we have created/deleted files with + * --pickaxe-raw-diff we need to fake up the + * "+" and "-" at the start of the lines, a + * plain -G without --pickaxe-raw-diff didn't + * care since it would indiscriminately search + * through both added and removed lines. + */ + strbuf_add_lines(&sb, !one ? "+" : "-", which->ptr, + which->size); + string = sb.buf; + size = sb.len; + } else { + string = which->ptr; + size = which->size; + } ret = !regexec_buf(regexp, string, size, 1, ®match, 0); + if (raw_diff) + strbuf_release(&sb); return ret; } @@ -64,6 +89,7 @@ static int diff_grep(mmfile_t *one, mmfile_t *two, memset(&xecfg, 0, sizeof(xecfg)); ecbdata.regexp = regexp; ecbdata.hit = 0; + ecbdata.raw_diff = raw_diff; xecfg.ctxlen = o->context; xecfg.interhunkctxlen = o->interhunkcontext; if (xdi_diff_outf(one, two, discard_hunk_line, diffgrep_consume, diff --git a/t/t4013-diff-various.sh b/t/t4013-diff-various.sh index 9f8f0e84ad..39a1f6c230 100755 --- a/t/t4013-diff-various.sh +++ b/t/t4013-diff-various.sh @@ -276,6 +276,7 @@ log -SF master --max-count=1 log -SF master --max-count=2 log -GF master log -GF -p master +log -GF -p --pickaxe-raw-diff master log -GF -p --pickaxe-all master log --decorate --all log --decorate=full --all diff --git a/t/t4209-log-pickaxe.sh b/t/t4209-log-pickaxe.sh index 5d06f5f45e..2d98318d23 100755 --- a/t/t4209-log-pickaxe.sh +++ b/t/t4209-log-pickaxe.sh @@ -141,4 +141,49 @@ test_expect_success 'log -S looks into binary files' ' test_cmp log full-log ' +test_expect_success 'setup log -G --pickaxe-raw-diff' ' + git checkout --orphan G-raw-diff && + test_write_lines A B C D E F G >file && + git add file && + git commit --allow-empty-message file && + sed -i -e "s/B/2/" file && + git add file && + git commit --allow-empty-message file && + sed -i -e "s/D/4/" file && + git add file && + git commit --allow-empty-message file && + git rm file && + git commit --allow-empty-message && + git log --oneline -1 HEAD~0 >file.fourth && + git log --oneline -1 HEAD~1 >file.third && + git log --oneline -1 HEAD~2 >file.second && + git log --oneline -1 HEAD~3 >file.first +' + +test_expect_success 'log -G --pickaxe-raw-diff skips header and range information' ' + git log --pickaxe-raw-diff -p -G"(@@|file)" >log && + test_must_be_empty log +' + +test_expect_success 'log -G --pickaxe-raw-diff searching in context' ' + git log --oneline --pickaxe-raw-diff -G"^ F" -U2 -s >log && + test_cmp file.third log && + git log --oneline --pickaxe-raw-diff -G"^ F" -U1 -s >log && + test_must_be_empty log +' + +test_expect_success 'log -G --pickaxe-raw-diff searching added / removed lines (skip create/delete)' ' + git log --oneline --pickaxe-raw-diff -G"^-[D2]" -s HEAD~1 >log && + test_cmp file.third log && + git log --oneline --pickaxe-raw-diff -G"^\+[D2]" -s -1 >log && + test_cmp file.second log +' + +test_expect_success 'log -G --pickaxe-raw-diff searching created / deleted files' ' + git log --oneline --pickaxe-raw-diff -G"^\+A" -s >log && + test_cmp file.first log && + git log --oneline --pickaxe-raw-diff -G"^\-A" -s >log && + test_cmp file.fourth log +' + test_done -- 2.21.0.593.g511ec345e18
