Merge branch 'js/xmerge-marker-eol' into maint
The low-level merge machinery has been taught to use CRLF line termination when inserting conflict markers to merged contents that are themselves CRLF line-terminated. * js/xmerge-marker-eol: merge-file: ensure that conflict sections match eol style merge-file: let conflict markers match end-of-line style of the context
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ab2c107eab
@ -346,4 +346,17 @@ test_expect_success 'conflict at EOF without LF resolved by --union' \
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printf "line1\nline2\nline3x\nline3y" >expect.txt &&
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test_cmp expect.txt output.txt'
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test_expect_success 'conflict sections match existing line endings' '
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printf "1\\r\\n2\\r\\n3" >crlf-orig.txt &&
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printf "1\\r\\n2\\r\\n4" >crlf-diff1.txt &&
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printf "1\\r\\n2\\r\\n5" >crlf-diff2.txt &&
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test_must_fail git -c core.eol=crlf merge-file -p \
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crlf-diff1.txt crlf-orig.txt crlf-diff2.txt >crlf.txt &&
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test $(tr "\015" Q <crlf.txt | grep "^[<=>].*Q$" | wc -l) = 3 &&
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test $(tr "\015" Q <crlf.txt | grep "[345]Q$" | wc -l) = 3 &&
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test_must_fail git -c core.eol=crlf merge-file -p \
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nolf-diff1.txt nolf-orig.txt nolf-diff2.txt >nolf.txt &&
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test $(tr "\015" Q <nolf.txt | grep "^[<=>].*Q$" | wc -l) = 0
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'
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test_done
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@ -109,7 +109,7 @@ 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_0(int use_orig, 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 needs_cr, int add_nl, char *dest)
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{
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xrecord_t **recs;
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int size = 0;
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@ -125,6 +125,12 @@ static int xdl_recs_copy_0(int use_orig, xdfenv_t *xe, int i, int count, int add
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if (add_nl) {
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i = recs[count - 1]->size;
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if (i == 0 || recs[count - 1]->ptr[i - 1] != '\n') {
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if (needs_cr) {
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if (dest)
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dest[size] = '\r';
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size++;
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}
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if (dest)
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dest[size] = '\n';
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size++;
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@ -133,14 +139,58 @@ static int xdl_recs_copy_0(int use_orig, xdfenv_t *xe, int i, int count, int add
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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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static int xdl_recs_copy(xdfenv_t *xe, int i, int count, int needs_cr, 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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return xdl_recs_copy_0(0, xe, i, count, needs_cr, 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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static int xdl_orig_copy(xdfenv_t *xe, int i, int count, int needs_cr, 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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return xdl_recs_copy_0(1, xe, i, count, needs_cr, add_nl, dest);
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}
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/*
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* Returns 1 if the i'th line ends in CR/LF (if it is the last line and
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* has no eol, the preceding line, if any), 0 if it ends in LF-only, and
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* -1 if the line ending cannot be determined.
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*/
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static int is_eol_crlf(xdfile_t *file, int i)
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{
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long size;
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if (i < file->nrec - 1)
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/* All lines before the last *must* end in LF */
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return (size = file->recs[i]->size) > 1 &&
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file->recs[i]->ptr[size - 2] == '\r';
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if (!file->nrec)
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/* Cannot determine eol style from empty file */
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return -1;
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if ((size = file->recs[i]->size) &&
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file->recs[i]->ptr[size - 1] == '\n')
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/* Last line; ends in LF; Is it CR/LF? */
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return size > 1 &&
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file->recs[i]->ptr[size - 2] == '\r';
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if (!i)
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/* The only line has no eol */
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return -1;
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/* Determine eol from second-to-last line */
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return (size = file->recs[i - 1]->size) > 1 &&
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file->recs[i - 1]->ptr[size - 2] == '\r';
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}
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static int is_cr_needed(xdfenv_t *xe1, xdfenv_t *xe2, xdmerge_t *m)
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{
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int needs_cr;
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/* Match post-images' preceding, or first, lines' end-of-line style */
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needs_cr = is_eol_crlf(&xe1->xdf2, m->i1 ? m->i1 - 1 : 0);
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if (needs_cr)
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needs_cr = is_eol_crlf(&xe2->xdf2, m->i2 ? m->i2 - 1 : 0);
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/* Look at pre-image's first line, unless we already settled on LF */
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if (needs_cr)
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needs_cr = is_eol_crlf(&xe1->xdf1, 0);
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/* If still undecided, use LF-only */
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return needs_cr < 0 ? 0 : needs_cr;
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}
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static int fill_conflict_hunk(xdfenv_t *xe1, const char *name1,
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@ -152,16 +202,17 @@ static int fill_conflict_hunk(xdfenv_t *xe1, const char *name1,
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int marker1_size = (name1 ? strlen(name1) + 1 : 0);
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int marker2_size = (name2 ? strlen(name2) + 1 : 0);
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int marker3_size = (name3 ? strlen(name3) + 1 : 0);
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int needs_cr = is_cr_needed(xe1, xe2, m);
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if (marker_size <= 0)
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marker_size = DEFAULT_CONFLICT_MARKER_SIZE;
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/* Before conflicting part */
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size += xdl_recs_copy(xe1, i, m->i1 - i, 0,
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size += xdl_recs_copy(xe1, i, m->i1 - i, 0, 0,
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dest ? dest + size : NULL);
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if (!dest) {
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size += marker_size + 1 + marker1_size;
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size += marker_size + 1 + needs_cr + marker1_size;
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} else {
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memset(dest + size, '<', marker_size);
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size += marker_size;
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@ -170,17 +221,19 @@ static int fill_conflict_hunk(xdfenv_t *xe1, const char *name1,
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memcpy(dest + size + 1, name1, marker1_size - 1);
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size += marker1_size;
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}
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if (needs_cr)
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dest[size++] = '\r';
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dest[size++] = '\n';
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}
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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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size += xdl_recs_copy(xe1, m->i1, m->chg1, needs_cr, 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 + marker3_size;
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size += marker_size + 1 + needs_cr + marker3_size;
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} else {
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memset(dest + size, '|', marker_size);
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size += marker_size;
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@ -189,25 +242,29 @@ static int fill_conflict_hunk(xdfenv_t *xe1, const char *name1,
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memcpy(dest + size + 1, name3, marker3_size - 1);
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size += marker3_size;
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}
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if (needs_cr)
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dest[size++] = '\r';
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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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size += xdl_orig_copy(xe1, m->i0, m->chg0, needs_cr, 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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size += marker_size + 1 + needs_cr;
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} else {
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memset(dest + size, '=', marker_size);
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size += marker_size;
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if (needs_cr)
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dest[size++] = '\r';
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dest[size++] = '\n';
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}
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/* Postimage from side #2 */
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size += xdl_recs_copy(xe2, m->i2, m->chg2, 1,
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size += xdl_recs_copy(xe2, m->i2, m->chg2, needs_cr, 1,
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dest ? dest + size : NULL);
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if (!dest) {
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size += marker_size + 1 + marker2_size;
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size += marker_size + 1 + needs_cr + marker2_size;
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} else {
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memset(dest + size, '>', marker_size);
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size += marker_size;
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@ -216,6 +273,8 @@ static int fill_conflict_hunk(xdfenv_t *xe1, const char *name1,
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memcpy(dest + size + 1, name2, marker2_size - 1);
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size += marker2_size;
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}
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if (needs_cr)
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dest[size++] = '\r';
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dest[size++] = '\n';
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}
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return size;
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@ -241,21 +300,24 @@ static int xdl_fill_merge_buffer(xdfenv_t *xe1, const char *name1,
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marker_size);
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else if (m->mode & 3) {
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/* Before conflicting part */
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size += xdl_recs_copy(xe1, i, m->i1 - i, 0,
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size += xdl_recs_copy(xe1, i, m->i1 - i, 0, 0,
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dest ? dest + size : NULL);
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/* Postimage from side #1 */
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if (m->mode & 1)
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size += xdl_recs_copy(xe1, m->i1, m->chg1, (m->mode & 2),
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if (m->mode & 1) {
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int needs_cr = is_cr_needed(xe1, xe2, m);
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size += xdl_recs_copy(xe1, m->i1, m->chg1, needs_cr, (m->mode & 2),
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dest ? dest + size : NULL);
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}
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/* Postimage from side #2 */
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if (m->mode & 2)
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size += xdl_recs_copy(xe2, m->i2, m->chg2, 0,
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size += xdl_recs_copy(xe2, m->i2, m->chg2, 0, 0,
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dest ? dest + size : NULL);
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} else
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continue;
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i = m->i1 + m->chg1;
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}
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size += xdl_recs_copy(xe1, i, xe1->xdf2.nrec - i, 0,
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size += xdl_recs_copy(xe1, i, xe1->xdf2.nrec - i, 0, 0,
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dest ? dest + size : NULL);
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return size;
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}
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