зеркало из https://github.com/microsoft/git.git
xdiff-merge: optionally show conflicts in "diff3 -m" style
When showing conflicting merges, we traditionally followed RCS's merge output format. The output shows: <<<<<<< postimage from one side; ======= postimage of the other side; and >>>>>>> Some poeple find it easier to be able to understand what is going on when they can view the common ancestor's version, which is used by "diff3 -m", which shows: <<<<<<< postimage from one side; ||||||| shared preimage; ======= postimage of the other side; and >>>>>>> This is an initial step to bring that as an optional feature to git. Only "git merge-file" has been converted, with "--diff3" option. Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano
Родитель
f2b25dd81f
Коммит
e0af48e496
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@ -4,7 +4,7 @@
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#include "xdiff-interface.h"
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static const char merge_file_usage[] =
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"git merge-file [-p | --stdout] [-q | --quiet] [-L name1 [-L orig [-L name2]]] file1 orig_file file2";
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"git merge-file [-p | --stdout] [--diff3] [-q | --quiet] [-L name1 [-L orig [-L name2]]] file1 orig_file file2";
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int cmd_merge_file(int argc, const char **argv, const char *prefix)
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{
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@ -13,6 +13,8 @@ int cmd_merge_file(int argc, const char **argv, const char *prefix)
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mmbuffer_t result = {NULL, 0};
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xpparam_t xpp = {XDF_NEED_MINIMAL};
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int ret = 0, i = 0, to_stdout = 0;
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int merge_level = XDL_MERGE_ZEALOUS_ALNUM;
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int merge_style = 0;
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while (argc > 4) {
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if (!strcmp(argv[1], "-L") && i < 3) {
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@ -25,6 +27,10 @@ int cmd_merge_file(int argc, const char **argv, const char *prefix)
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else if (!strcmp(argv[1], "-q") ||
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!strcmp(argv[1], "--quiet"))
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freopen("/dev/null", "w", stderr);
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else if (!strcmp(argv[1], "--diff3")) {
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merge_style = XDL_MERGE_DIFF3;
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merge_level = XDL_MERGE_EAGER;
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}
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else
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usage(merge_file_usage);
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argc--;
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@ -46,7 +52,7 @@ int cmd_merge_file(int argc, const char **argv, const char *prefix)
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}
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ret = xdl_merge(mmfs + 1, mmfs + 0, names[0], mmfs + 2, names[2],
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&xpp, XDL_MERGE_ZEALOUS_ALNUM, &result);
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&xpp, merge_level | merge_style, &result);
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for (i = 0; i < 3; i++)
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free(mmfs[i].ptr);
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@ -161,4 +161,41 @@ test_expect_success 'ZEALOUS_ALNUM' '
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'
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cat >expect <<\EOF
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Dominus regit me,
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<<<<<<< new8.txt
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et nihil mihi deerit;
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In loco pascuae ibi me collocavit;
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super aquam refectionis educavit me.
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|||||||
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et nihil mihi deerit.
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In loco pascuae ibi me collocavit,
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super aquam refectionis educavit me;
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=======
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et nihil mihi deerit,
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In loco pascuae ibi me collocavit --
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super aquam refectionis educavit me,
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>>>>>>> new9.txt
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animam meam convertit,
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deduxit me super semitas jusitiae,
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propter nomen suum.
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Nam et si ambulavero in medio umbrae mortis,
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non timebo mala, quoniam TU mecum es:
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virga tua et baculus tuus ipsa me consolata sunt.
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EOF
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test_expect_success '"diff3 -m" style output' '
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test_must_fail git merge-file -p --diff3 \
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new8.txt new5.txt new9.txt >actual &&
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test_cmp expect actual
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'
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test_done
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@ -50,10 +50,16 @@ extern "C" {
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#define XDL_BDOP_CPY 2
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#define XDL_BDOP_INSB 3
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/* merge simplification levels */
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#define XDL_MERGE_MINIMAL 0
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#define XDL_MERGE_EAGER 1
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#define XDL_MERGE_ZEALOUS 2
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#define XDL_MERGE_ZEALOUS_ALNUM 3
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#define XDL_MERGE_LEVEL_MASK 0x0f
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/* merge output styles */
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#define XDL_MERGE_DIFF3 0x8000
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#define XDL_MERGE_STYLE_MASK 0x8000
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typedef struct s_mmfile {
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char *ptr;
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103
xdiff/xmerge.c
103
xdiff/xmerge.c
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@ -30,17 +30,32 @@ typedef struct s_xdmerge {
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* 2 = no conflict, take second.
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*/
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int mode;
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/*
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* These point at the respective postimages. E.g. <i1,chg1> is
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* how side #1 wants to change the common ancestor; if there is no
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* overlap, lines before i1 in the postimage of side #1 appear
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* in the merge result as a region touched by neither side.
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*/
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long i1, i2;
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long chg1, chg2;
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/*
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* These point at the preimage; of course there is just one
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* preimage, that is from the shared common ancestor.
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*/
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long i0;
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long chg0;
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} xdmerge_t;
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static int xdl_append_merge(xdmerge_t **merge, int mode,
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long i1, long chg1, long i2, long chg2)
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long i0, long chg0,
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long i1, long chg1,
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long i2, long chg2)
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{
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xdmerge_t *m = *merge;
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if (m && (i1 <= m->i1 + m->chg1 || i2 <= m->i2 + m->chg2)) {
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if (mode != m->mode)
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m->mode = 0;
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m->chg0 = i0 + chg0 - m->i0;
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m->chg1 = i1 + chg1 - m->i1;
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m->chg2 = i2 + chg2 - m->i2;
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} else {
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@ -49,6 +64,8 @@ static int xdl_append_merge(xdmerge_t **merge, int mode,
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return -1;
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m->next = NULL;
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m->mode = mode;
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m->i0 = i0;
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m->chg0 = chg0;
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m->i1 = i1;
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m->chg1 = chg1;
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m->i2 = i2;
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@ -91,11 +108,13 @@ static int xdl_merge_cmp_lines(xdfenv_t *xe1, int i1, xdfenv_t *xe2, int i2,
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return 0;
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}
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static int xdl_recs_copy(xdfenv_t *xe, int i, int count, int add_nl, char *dest)
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static int xdl_recs_copy_0(int use_orig, xdfenv_t *xe, int i, int count, int add_nl, char *dest)
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{
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xrecord_t **recs = xe->xdf2.recs + i;
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xrecord_t **recs;
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int size = 0;
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recs = (use_orig ? xe->xdf1.recs : xe->xdf2.recs) + i;
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if (count < 1)
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return 0;
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@ -113,9 +132,19 @@ static int xdl_recs_copy(xdfenv_t *xe, int i, int count, int add_nl, char *dest)
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return size;
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}
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static int xdl_recs_copy(xdfenv_t *xe, int i, int count, int add_nl, char *dest)
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{
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return xdl_recs_copy_0(0, xe, i, count, add_nl, dest);
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}
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static int xdl_orig_copy(xdfenv_t *xe, int i, int count, int add_nl, char *dest)
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{
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return xdl_recs_copy_0(1, xe, i, count, add_nl, dest);
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}
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static int fill_conflict_hunk(xdfenv_t *xe1, const char *name1,
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xdfenv_t *xe2, const char *name2,
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int size, int i,
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int size, int i, int style,
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xdmerge_t *m, char *dest)
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{
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const int marker_size = 7;
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@ -143,6 +172,20 @@ static int fill_conflict_hunk(xdfenv_t *xe1, const char *name1,
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/* Postimage from side #1 */
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size += xdl_recs_copy(xe1, m->i1, m->chg1, 1,
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dest ? dest + size : NULL);
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if (style == XDL_MERGE_DIFF3) {
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/* Shared preimage */
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if (!dest) {
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size += marker_size + 1;
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} else {
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for (j = 0; j < marker_size; j++)
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dest[size++] = '|';
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dest[size++] = '\n';
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}
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size += xdl_orig_copy(xe1, m->i0, m->chg0, 1,
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dest ? dest + size : NULL);
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}
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if (!dest) {
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size += marker_size + 1;
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} else {
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@ -170,14 +213,15 @@ static int fill_conflict_hunk(xdfenv_t *xe1, const char *name1,
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}
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static int xdl_fill_merge_buffer(xdfenv_t *xe1, const char *name1,
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xdfenv_t *xe2, const char *name2, xdmerge_t *m, char *dest)
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xdfenv_t *xe2, const char *name2,
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xdmerge_t *m, char *dest, int style)
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{
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int size, i;
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for (size = i = 0; m; m = m->next) {
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if (m->mode == 0)
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size = fill_conflict_hunk(xe1, name1, xe2, name2,
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size, i, m, dest);
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size, i, style, m, dest);
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else if (m->mode == 1)
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size += xdl_recs_copy(xe1, i, m->i1 + m->chg1 - i, 0,
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dest ? dest + size : NULL);
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@ -342,9 +386,11 @@ static int xdl_simplify_non_conflicts(xdfenv_t *xe1, xdmerge_t *m,
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*/
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static int xdl_do_merge(xdfenv_t *xe1, xdchange_t *xscr1, const char *name1,
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xdfenv_t *xe2, xdchange_t *xscr2, const char *name2,
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int level, xpparam_t const *xpp, mmbuffer_t *result) {
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int flags, xpparam_t const *xpp, mmbuffer_t *result) {
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xdmerge_t *changes, *c;
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int i1, i2, chg1, chg2;
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int i0, i1, i2, chg0, chg1, chg2;
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int level = flags & XDL_MERGE_LEVEL_MASK;
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int style = flags & XDL_MERGE_STYLE_MASK;
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c = changes = NULL;
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@ -352,11 +398,14 @@ static int xdl_do_merge(xdfenv_t *xe1, xdchange_t *xscr1, const char *name1,
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if (!changes)
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changes = c;
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if (xscr1->i1 + xscr1->chg1 < xscr2->i1) {
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i0 = xscr1->i1;
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i1 = xscr1->i2;
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i2 = xscr2->i2 - xscr2->i1 + xscr1->i1;
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chg0 = xscr1->chg1;
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chg1 = xscr1->chg2;
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chg2 = xscr1->chg1;
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if (xdl_append_merge(&c, 1, i1, chg1, i2, chg2)) {
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if (xdl_append_merge(&c, 1,
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i0, chg0, i1, chg1, i2, chg2)) {
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xdl_cleanup_merge(changes);
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return -1;
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}
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@ -364,11 +413,14 @@ static int xdl_do_merge(xdfenv_t *xe1, xdchange_t *xscr1, const char *name1,
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continue;
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}
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if (xscr2->i1 + xscr2->chg1 < xscr1->i1) {
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i0 = xscr2->i1;
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i1 = xscr1->i2 - xscr1->i1 + xscr2->i1;
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i2 = xscr2->i2;
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chg0 = xscr2->chg1;
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chg1 = xscr2->chg1;
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chg2 = xscr2->chg2;
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if (xdl_append_merge(&c, 2, i1, chg1, i2, chg2)) {
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if (xdl_append_merge(&c, 2,
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i0, chg0, i1, chg1, i2, chg2)) {
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xdl_cleanup_merge(changes);
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return -1;
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}
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@ -385,19 +437,26 @@ static int xdl_do_merge(xdfenv_t *xe1, xdchange_t *xscr1, const char *name1,
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int off = xscr1->i1 - xscr2->i1;
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int ffo = off + xscr1->chg1 - xscr2->chg1;
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i0 = xscr1->i1;
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i1 = xscr1->i2;
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i2 = xscr2->i2;
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if (off > 0)
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if (off > 0) {
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i0 -= off;
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i1 -= off;
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}
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else
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i2 += off;
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chg0 = xscr1->i1 + xscr1->chg1 - i0;
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chg1 = xscr1->i2 + xscr1->chg2 - i1;
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chg2 = xscr2->i2 + xscr2->chg2 - i2;
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if (ffo > 0)
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chg2 += ffo;
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else
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else {
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chg0 -= ffo;
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chg1 -= ffo;
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if (xdl_append_merge(&c, 0, i1, chg1, i2, chg2)) {
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}
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if (xdl_append_merge(&c, 0,
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i0, chg0, i1, chg1, i2, chg2)) {
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xdl_cleanup_merge(changes);
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return -1;
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}
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@ -414,11 +473,14 @@ static int xdl_do_merge(xdfenv_t *xe1, xdchange_t *xscr1, const char *name1,
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while (xscr1) {
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if (!changes)
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changes = c;
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i0 = xscr1->i1;
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i1 = xscr1->i2;
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i2 = xscr1->i1 + xe2->xdf2.nrec - xe2->xdf1.nrec;
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chg0 = xscr1->chg1;
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chg1 = xscr1->chg2;
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chg2 = xscr1->chg1;
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if (xdl_append_merge(&c, 1, i1, chg1, i2, chg2)) {
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if (xdl_append_merge(&c, 1,
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i0, chg0, i1, chg1, i2, chg2)) {
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xdl_cleanup_merge(changes);
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return -1;
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}
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@ -427,11 +489,14 @@ static int xdl_do_merge(xdfenv_t *xe1, xdchange_t *xscr1, const char *name1,
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while (xscr2) {
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if (!changes)
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changes = c;
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i0 = xscr2->i1;
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i1 = xscr2->i1 + xe1->xdf2.nrec - xe1->xdf1.nrec;
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i2 = xscr2->i2;
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chg0 = xscr2->chg1;
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chg1 = xscr2->chg1;
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chg2 = xscr2->chg2;
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if (xdl_append_merge(&c, 2, i1, chg1, i2, chg2)) {
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if (xdl_append_merge(&c, 2,
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i0, chg0, i1, chg1, i2, chg2)) {
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xdl_cleanup_merge(changes);
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return -1;
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}
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@ -449,7 +514,7 @@ static int xdl_do_merge(xdfenv_t *xe1, xdchange_t *xscr1, const char *name1,
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/* output */
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if (result) {
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int size = xdl_fill_merge_buffer(xe1, name1, xe2, name2,
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changes, NULL);
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changes, NULL, style);
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result->ptr = xdl_malloc(size);
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if (!result->ptr) {
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xdl_cleanup_merge(changes);
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@ -457,14 +522,14 @@ static int xdl_do_merge(xdfenv_t *xe1, xdchange_t *xscr1, const char *name1,
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}
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result->size = size;
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xdl_fill_merge_buffer(xe1, name1, xe2, name2, changes,
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result->ptr);
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result->ptr, style);
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}
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return xdl_cleanup_merge(changes);
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}
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int xdl_merge(mmfile_t *orig, mmfile_t *mf1, const char *name1,
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mmfile_t *mf2, const char *name2,
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xpparam_t const *xpp, int level, mmbuffer_t *result) {
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xpparam_t const *xpp, int flags, mmbuffer_t *result) {
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xdchange_t *xscr1, *xscr2;
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xdfenv_t xe1, xe2;
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int status;
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@ -501,7 +566,7 @@ int xdl_merge(mmfile_t *orig, mmfile_t *mf1, const char *name1,
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} else {
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status = xdl_do_merge(&xe1, xscr1, name1,
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&xe2, xscr2, name2,
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level, xpp, result);
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flags, xpp, result);
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}
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xdl_free_script(xscr1);
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xdl_free_script(xscr2);
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