diff options
| -rw-r--r-- | Documentation/diff-options.txt | 3 | ||||
| -rw-r--r-- | diff.c | 2 | ||||
| -rwxr-xr-x | t/t4015-diff-whitespace.sh | 345 | ||||
| -rw-r--r-- | xdiff/xdiff.h | 2 | ||||
| -rw-r--r-- | xdiff/xdiffi.c | 29 | ||||
| -rw-r--r-- | xdiff/xdiffi.h | 1 | ||||
| -rw-r--r-- | xdiff/xemit.c | 49 | ||||
| -rw-r--r-- | xdiff/xemit.h | 2 | ||||
| -rw-r--r-- | xdiff/xutils.c | 13 | ||||
| -rw-r--r-- | xdiff/xutils.h | 1 |
10 files changed, 439 insertions, 8 deletions
diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt index 104579d..80f06b7 100644 --- a/Documentation/diff-options.txt +++ b/Documentation/diff-options.txt @@ -439,6 +439,9 @@ endif::git-format-patch[] differences even if one line has whitespace where the other line has none. +--ignore-blank-lines:: + Ignore changes whose lines are all blank. + --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. @@ -3593,6 +3593,8 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac) DIFF_XDL_SET(options, IGNORE_WHITESPACE_CHANGE); else if (!strcmp(arg, "--ignore-space-at-eol")) DIFF_XDL_SET(options, IGNORE_WHITESPACE_AT_EOL); + else if (!strcmp(arg, "--ignore-blank-lines")) + DIFF_XDL_SET(options, IGNORE_BLANK_LINES); else if (!strcmp(arg, "--patience")) options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF); else if (!strcmp(arg, "--histogram")) diff --git a/t/t4015-diff-whitespace.sh b/t/t4015-diff-whitespace.sh index cc3db13..3fb4b97 100755 --- a/t/t4015-diff-whitespace.sh +++ b/t/t4015-diff-whitespace.sh @@ -142,6 +142,351 @@ EOF git diff --ignore-space-at-eol > out test_expect_success 'another test, with --ignore-space-at-eol' 'test_cmp expect out' +test_expect_success 'ignore-blank-lines: only new lines' ' + test_seq 5 >x && + git update-index x && + test_seq 5 | sed "/3/i \\ +" >x && + git diff --ignore-blank-lines >out && + >expect && + test_cmp out expect +' + +test_expect_success 'ignore-blank-lines: only new lines with space' ' + test_seq 5 >x && + git update-index x && + test_seq 5 | sed "/3/i \ " >x && + git diff -w --ignore-blank-lines >out && + >expect && + test_cmp out expect +' + +test_expect_success 'ignore-blank-lines: after change' ' + cat <<-\EOF >x && + 1 + 2 + + 3 + 4 + 5 + + 6 + 7 + EOF + git update-index x && + cat <<-\EOF >x && + change + + 1 + 2 + 3 + 4 + 5 + 6 + + 7 + EOF + git diff --inter-hunk-context=100 --ignore-blank-lines >out.tmp && + cat <<-\EOF >expected && + diff --git a/x b/x + --- a/x + +++ b/x + @@ -1,6 +1,7 @@ + +change + + + 1 + 2 + - + 3 + 4 + 5 + EOF + compare_diff_patch expected out.tmp +' + +test_expect_success 'ignore-blank-lines: before change' ' + cat <<-\EOF >x && + 1 + 2 + + 3 + 4 + 5 + 6 + 7 + EOF + git update-index x && + cat <<-\EOF >x && + + 1 + 2 + 3 + 4 + 5 + + 6 + 7 + change + EOF + git diff --inter-hunk-context=100 --ignore-blank-lines >out.tmp && + cat <<-\EOF >expected && + diff --git a/x b/x + --- a/x + +++ b/x + @@ -4,5 +4,7 @@ + 3 + 4 + 5 + + + 6 + 7 + +change + EOF + compare_diff_patch expected out.tmp +' + +test_expect_success 'ignore-blank-lines: between changes' ' + cat <<-\EOF >x && + 1 + 2 + 3 + 4 + 5 + + + 6 + 7 + 8 + 9 + 10 + EOF + git update-index x && + cat <<-\EOF >x && + change + 1 + 2 + + 3 + 4 + 5 + 6 + 7 + 8 + + 9 + 10 + change + EOF + git diff --ignore-blank-lines >out.tmp && + cat <<-\EOF >expected && + diff --git a/x b/x + --- a/x + +++ b/x + @@ -1,5 +1,7 @@ + +change + 1 + 2 + + + 3 + 4 + 5 + @@ -8,5 +8,7 @@ + 6 + 7 + 8 + + + 9 + 10 + +change + EOF + compare_diff_patch expected out.tmp +' + +test_expect_success 'ignore-blank-lines: between changes (with interhunkctx)' ' + test_seq 10 >x && + git update-index x && + cat <<-\EOF >x && + change + 1 + 2 + + 3 + 4 + 5 + + 6 + 7 + 8 + 9 + + 10 + change + EOF + git diff --inter-hunk-context=2 --ignore-blank-lines >out.tmp && + cat <<-\EOF >expected && + diff --git a/x b/x + --- a/x + +++ b/x + @@ -1,10 +1,15 @@ + +change + 1 + 2 + + + 3 + 4 + 5 + + + 6 + 7 + 8 + 9 + + + 10 + +change + EOF + compare_diff_patch expected out.tmp +' + +test_expect_success 'ignore-blank-lines: scattered spaces' ' + test_seq 10 >x && + git update-index x && + cat <<-\EOF >x && + change + 1 + 2 + 3 + + 4 + + 5 + + 6 + + + 7 + + 8 + 9 + 10 + change + EOF + git diff --inter-hunk-context=4 --ignore-blank-lines >out.tmp && + cat <<-\EOF >expected && + diff --git a/x b/x + --- a/x + +++ b/x + @@ -1,3 +1,4 @@ + +change + 1 + 2 + 3 + @@ -8,3 +15,4 @@ + 8 + 9 + 10 + +change + EOF + compare_diff_patch expected out.tmp +' + +test_expect_success 'ignore-blank-lines: spaces coalesce' ' + test_seq 6 >x && + git update-index x && + cat <<-\EOF >x && + change + 1 + 2 + 3 + + 4 + + 5 + + 6 + change + EOF + git diff --inter-hunk-context=4 --ignore-blank-lines >out.tmp && + cat <<-\EOF >expected && + diff --git a/x b/x + --- a/x + +++ b/x + @@ -1,6 +1,11 @@ + +change + 1 + 2 + 3 + + + 4 + + + 5 + + + 6 + +change + EOF + compare_diff_patch expected out.tmp +' + +test_expect_success 'ignore-blank-lines: mix changes and blank lines' ' + test_seq 16 >x && + git update-index x && + cat <<-\EOF >x && + change + 1 + 2 + + 3 + 4 + 5 + change + 6 + 7 + 8 + + 9 + 10 + 11 + change + 12 + 13 + 14 + + 15 + 16 + change + EOF + git diff --ignore-blank-lines >out.tmp && + cat <<-\EOF >expected && + diff --git a/x b/x + --- a/x + +++ b/x + @@ -1,8 +1,11 @@ + +change + 1 + 2 + + + 3 + 4 + 5 + +change + 6 + 7 + 8 + @@ -9,8 +13,11 @@ + 9 + 10 + 11 + +change + 12 + 13 + 14 + + + 15 + 16 + +change + EOF + compare_diff_patch expected out.tmp +' + test_expect_success 'check mixed spaces and tabs in indent' ' # This is indented with SP HT SP. diff --git a/xdiff/xdiff.h b/xdiff/xdiff.h index 219a3bb..c033991 100644 --- a/xdiff/xdiff.h +++ b/xdiff/xdiff.h @@ -39,6 +39,8 @@ extern "C" { #define XDF_DIFF_ALGORITHM_MASK (XDF_PATIENCE_DIFF | XDF_HISTOGRAM_DIFF) #define XDF_DIFF_ALG(x) ((x) & XDF_DIFF_ALGORITHM_MASK) +#define XDF_IGNORE_BLANK_LINES (1 << 7) + #define XDL_EMIT_FUNCNAMES (1 << 0) #define XDL_EMIT_COMMON (1 << 1) #define XDL_EMIT_FUNCCONTEXT (1 << 2) diff --git a/xdiff/xdiffi.c b/xdiff/xdiffi.c index b2eb6db..2358a2d 100644 --- a/xdiff/xdiffi.c +++ b/xdiff/xdiffi.c @@ -394,6 +394,7 @@ static xdchange_t *xdl_add_change(xdchange_t *xscr, long i1, long i2, long chg1, xch->i2 = i2; xch->chg1 = chg1; xch->chg2 = chg2; + xch->ignore = 0; return xch; } @@ -544,7 +545,9 @@ static int xdl_call_hunk_func(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, xdchange_t *xch, *xche; for (xch = xscr; xch; xch = xche->next) { - xche = xdl_get_hunk(xch, xecfg); + xche = xdl_get_hunk(&xch, xecfg); + if (!xch) + break; if (xecfg->hunk_func(xch->i1, xche->i1 + xche->chg1 - xch->i1, xch->i2, xche->i2 + xche->chg2 - xch->i2, ecb->priv) < 0) @@ -553,6 +556,27 @@ static int xdl_call_hunk_func(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, return 0; } +static void xdl_mark_ignorable(xdchange_t *xscr, xdfenv_t *xe, long flags) +{ + xdchange_t *xch; + + for (xch = xscr; xch; xch = xch->next) { + int ignore = 1; + xrecord_t **rec; + long i; + + rec = &xe->xdf1.recs[xch->i1]; + for (i = 0; i < xch->chg1 && ignore; i++) + ignore = xdl_blankline(rec[i]->ptr, rec[i]->size, flags); + + rec = &xe->xdf2.recs[xch->i2]; + for (i = 0; i < xch->chg2 && ignore; i++) + ignore = xdl_blankline(rec[i]->ptr, rec[i]->size, flags); + + xch->ignore = ignore; + } +} + int xdl_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, xdemitconf_t const *xecfg, xdemitcb_t *ecb) { xdchange_t *xscr; @@ -571,6 +595,9 @@ int xdl_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, return -1; } if (xscr) { + if (xpp->flags & XDF_IGNORE_BLANK_LINES) + xdl_mark_ignorable(xscr, &xe, xpp->flags); + if (ef(&xe, xscr, ecb, xecfg) < 0) { xdl_free_script(xscr); diff --git a/xdiff/xdiffi.h b/xdiff/xdiffi.h index 7a92ea9..8b81206 100644 --- a/xdiff/xdiffi.h +++ b/xdiff/xdiffi.h @@ -41,6 +41,7 @@ typedef struct s_xdchange { struct s_xdchange *next; long i1, i2; long chg1, chg2; + int ignore; } xdchange_t; diff --git a/xdiff/xemit.c b/xdiff/xemit.c index d11dbf9..4d86458 100644 --- a/xdiff/xemit.c +++ b/xdiff/xemit.c @@ -56,16 +56,51 @@ static int xdl_emit_record(xdfile_t *xdf, long ri, char const *pre, xdemitcb_t * /* * Starting at the passed change atom, find the latest change atom to be included * inside the differential hunk according to the specified configuration. + * Also advance xscr if the first changes must be discarded. */ -xdchange_t *xdl_get_hunk(xdchange_t *xscr, xdemitconf_t const *xecfg) { - xdchange_t *xch, *xchp; +xdchange_t *xdl_get_hunk(xdchange_t **xscr, xdemitconf_t const *xecfg) +{ + xdchange_t *xch, *xchp, *lxch; long max_common = 2 * xecfg->ctxlen + xecfg->interhunkctxlen; + long max_ignorable = xecfg->ctxlen; + unsigned long ignored = 0; /* number of ignored blank lines */ + + /* remove ignorable changes that are too far before other changes */ + for (xchp = *xscr; xchp && xchp->ignore; xchp = xchp->next) { + xch = xchp->next; + + if (xch == NULL || + xch->i1 - (xchp->i1 + xchp->chg1) >= max_ignorable) + *xscr = xch; + } + + if (*xscr == NULL) + return NULL; + + lxch = *xscr; - for (xchp = xscr, xch = xscr->next; xch; xchp = xch, xch = xch->next) - if (xch->i1 - (xchp->i1 + xchp->chg1) > max_common) + for (xchp = *xscr, xch = xchp->next; xch; xchp = xch, xch = xch->next) { + long distance = xch->i1 - (xchp->i1 + xchp->chg1); + if (distance > max_common) break; - return xchp; + if (distance < max_ignorable && (!xch->ignore || lxch == xchp)) { + lxch = xch; + ignored = 0; + } else if (distance < max_ignorable && xch->ignore) { + ignored += xch->chg2; + } else if (lxch != xchp && + xch->i1 + ignored - (lxch->i1 + lxch->chg1) > max_common) { + break; + } else if (!xch->ignore) { + lxch = xch; + ignored = 0; + } else { + ignored += xch->chg2; + } + } + + return lxch; } @@ -139,7 +174,9 @@ int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, return xdl_emit_common(xe, xscr, ecb, xecfg); for (xch = xscr; xch; xch = xche->next) { - xche = xdl_get_hunk(xch, xecfg); + xche = xdl_get_hunk(&xch, xecfg); + if (!xch) + break; s1 = XDL_MAX(xch->i1 - xecfg->ctxlen, 0); s2 = XDL_MAX(xch->i2 - xecfg->ctxlen, 0); diff --git a/xdiff/xemit.h b/xdiff/xemit.h index c2e2e83..d297107 100644 --- a/xdiff/xemit.h +++ b/xdiff/xemit.h @@ -27,7 +27,7 @@ typedef int (*emit_func_t)(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, xdemitconf_t const *xecfg); -xdchange_t *xdl_get_hunk(xdchange_t *xscr, xdemitconf_t const *xecfg); +xdchange_t *xdl_get_hunk(xdchange_t **xscr, xdemitconf_t const *xecfg); int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, xdemitconf_t const *xecfg); diff --git a/xdiff/xutils.c b/xdiff/xutils.c index 9504eae..62cb23d 100644 --- a/xdiff/xutils.c +++ b/xdiff/xutils.c @@ -143,6 +143,19 @@ long xdl_guess_lines(mmfile_t *mf, long sample) { return nl + 1; } +int xdl_blankline(const char *line, long size, long flags) +{ + long i; + + if (!(flags & XDF_WHITESPACE_FLAGS)) + return (size <= 1); + + for (i = 0; i < size && XDL_ISSPACE(line[i]); i++) + ; + + return (i == size); +} + int xdl_recmatch(const char *l1, long s1, const char *l2, long s2, long flags) { int i1, i2; diff --git a/xdiff/xutils.h b/xdiff/xutils.h index ad1428e..4646ce5 100644 --- a/xdiff/xutils.h +++ b/xdiff/xutils.h @@ -32,6 +32,7 @@ int xdl_cha_init(chastore_t *cha, long isize, long icount); void xdl_cha_free(chastore_t *cha); void *xdl_cha_alloc(chastore_t *cha); long xdl_guess_lines(mmfile_t *mf, long sample); +int xdl_blankline(const char *line, long size, long flags); int xdl_recmatch(const char *l1, long s1, const char *l2, long s2, long flags); unsigned long xdl_hash_record(char const **data, char const *top, long flags); unsigned int xdl_hashbits(unsigned int size); |