| #include "cache.h" |
| #include "commit.h" |
| #include "blob.h" |
| #include "diff.h" |
| #include "diffcore.h" |
| #include "quote.h" |
| #include "xdiff-interface.h" |
| #include "log-tree.h" |
| #include "refs.h" |
| #include "userdiff.h" |
| #include "sha1-array.h" |
| |
| static struct combine_diff_path *intersect_paths(struct combine_diff_path *curr, int n, int num_parent) |
| { |
| struct diff_queue_struct *q = &diff_queued_diff; |
| struct combine_diff_path *p; |
| int i; |
| |
| if (!n) { |
| struct combine_diff_path *list = NULL, **tail = &list; |
| for (i = 0; i < q->nr; i++) { |
| int len; |
| const char *path; |
| if (diff_unmodified_pair(q->queue[i])) |
| continue; |
| path = q->queue[i]->two->path; |
| len = strlen(path); |
| p = xmalloc(combine_diff_path_size(num_parent, len)); |
| p->path = (char *) &(p->parent[num_parent]); |
| memcpy(p->path, path, len); |
| p->path[len] = 0; |
| p->len = len; |
| p->next = NULL; |
| memset(p->parent, 0, |
| sizeof(p->parent[0]) * num_parent); |
| |
| hashcpy(p->sha1, q->queue[i]->two->sha1); |
| p->mode = q->queue[i]->two->mode; |
| hashcpy(p->parent[n].sha1, q->queue[i]->one->sha1); |
| p->parent[n].mode = q->queue[i]->one->mode; |
| p->parent[n].status = q->queue[i]->status; |
| *tail = p; |
| tail = &p->next; |
| } |
| return list; |
| } |
| |
| for (p = curr; p; p = p->next) { |
| int found = 0; |
| if (!p->len) |
| continue; |
| for (i = 0; i < q->nr; i++) { |
| const char *path; |
| int len; |
| |
| if (diff_unmodified_pair(q->queue[i])) |
| continue; |
| path = q->queue[i]->two->path; |
| len = strlen(path); |
| if (len == p->len && !memcmp(path, p->path, len)) { |
| found = 1; |
| hashcpy(p->parent[n].sha1, q->queue[i]->one->sha1); |
| p->parent[n].mode = q->queue[i]->one->mode; |
| p->parent[n].status = q->queue[i]->status; |
| break; |
| } |
| } |
| if (!found) |
| p->len = 0; |
| } |
| return curr; |
| } |
| |
| /* Lines lost from parent */ |
| struct lline { |
| struct lline *next; |
| int len; |
| unsigned long parent_map; |
| char line[FLEX_ARRAY]; |
| }; |
| |
| /* Lines surviving in the merge result */ |
| struct sline { |
| struct lline *lost_head, **lost_tail; |
| struct lline *next_lost; |
| char *bol; |
| int len; |
| /* bit 0 up to (N-1) are on if the parent has this line (i.e. |
| * we did not change it). |
| * bit N is used for "interesting" lines, including context. |
| * bit (N+1) is used for "do not show deletion before this". |
| */ |
| unsigned long flag; |
| unsigned long *p_lno; |
| }; |
| |
| static char *grab_blob(const unsigned char *sha1, unsigned int mode, |
| unsigned long *size, struct userdiff_driver *textconv, |
| const char *path) |
| { |
| char *blob; |
| enum object_type type; |
| |
| if (S_ISGITLINK(mode)) { |
| blob = xmalloc(100); |
| *size = snprintf(blob, 100, |
| "Subproject commit %s\n", sha1_to_hex(sha1)); |
| } else if (is_null_sha1(sha1)) { |
| /* deleted blob */ |
| *size = 0; |
| return xcalloc(1, 1); |
| } else if (textconv) { |
| struct diff_filespec *df = alloc_filespec(path); |
| fill_filespec(df, sha1, mode); |
| *size = fill_textconv(textconv, df, &blob); |
| free_filespec(df); |
| } else { |
| blob = read_sha1_file(sha1, &type, size); |
| if (type != OBJ_BLOB) |
| die("object '%s' is not a blob!", sha1_to_hex(sha1)); |
| } |
| return blob; |
| } |
| |
| static void append_lost(struct sline *sline, int n, const char *line, int len) |
| { |
| struct lline *lline; |
| unsigned long this_mask = (1UL<<n); |
| if (line[len-1] == '\n') |
| len--; |
| |
| /* Check to see if we can squash things */ |
| if (sline->lost_head) { |
| lline = sline->next_lost; |
| while (lline) { |
| if (lline->len == len && |
| !memcmp(lline->line, line, len)) { |
| lline->parent_map |= this_mask; |
| sline->next_lost = lline->next; |
| return; |
| } |
| lline = lline->next; |
| } |
| } |
| |
| lline = xmalloc(sizeof(*lline) + len + 1); |
| lline->len = len; |
| lline->next = NULL; |
| lline->parent_map = this_mask; |
| memcpy(lline->line, line, len); |
| lline->line[len] = 0; |
| *sline->lost_tail = lline; |
| sline->lost_tail = &lline->next; |
| sline->next_lost = NULL; |
| } |
| |
| struct combine_diff_state { |
| unsigned int lno; |
| int ob, on, nb, nn; |
| unsigned long nmask; |
| int num_parent; |
| int n; |
| struct sline *sline; |
| struct sline *lost_bucket; |
| }; |
| |
| static void consume_line(void *state_, char *line, unsigned long len) |
| { |
| struct combine_diff_state *state = state_; |
| if (5 < len && !memcmp("@@ -", line, 4)) { |
| if (parse_hunk_header(line, len, |
| &state->ob, &state->on, |
| &state->nb, &state->nn)) |
| return; |
| state->lno = state->nb; |
| if (state->nn == 0) { |
| /* @@ -X,Y +N,0 @@ removed Y lines |
| * that would have come *after* line N |
| * in the result. Our lost buckets hang |
| * to the line after the removed lines, |
| * |
| * Note that this is correct even when N == 0, |
| * in which case the hunk removes the first |
| * line in the file. |
| */ |
| state->lost_bucket = &state->sline[state->nb]; |
| if (!state->nb) |
| state->nb = 1; |
| } else { |
| state->lost_bucket = &state->sline[state->nb-1]; |
| } |
| if (!state->sline[state->nb-1].p_lno) |
| state->sline[state->nb-1].p_lno = |
| xcalloc(state->num_parent, |
| sizeof(unsigned long)); |
| state->sline[state->nb-1].p_lno[state->n] = state->ob; |
| state->lost_bucket->next_lost = state->lost_bucket->lost_head; |
| return; |
| } |
| if (!state->lost_bucket) |
| return; /* not in any hunk yet */ |
| switch (line[0]) { |
| case '-': |
| append_lost(state->lost_bucket, state->n, line+1, len-1); |
| break; |
| case '+': |
| state->sline[state->lno-1].flag |= state->nmask; |
| state->lno++; |
| break; |
| } |
| } |
| |
| static void combine_diff(const unsigned char *parent, unsigned int mode, |
| mmfile_t *result_file, |
| struct sline *sline, unsigned int cnt, int n, |
| int num_parent, int result_deleted, |
| struct userdiff_driver *textconv, |
| const char *path) |
| { |
| unsigned int p_lno, lno; |
| unsigned long nmask = (1UL << n); |
| xpparam_t xpp; |
| xdemitconf_t xecfg; |
| mmfile_t parent_file; |
| struct combine_diff_state state; |
| unsigned long sz; |
| |
| if (result_deleted) |
| return; /* result deleted */ |
| |
| parent_file.ptr = grab_blob(parent, mode, &sz, textconv, path); |
| parent_file.size = sz; |
| memset(&xpp, 0, sizeof(xpp)); |
| xpp.flags = 0; |
| memset(&xecfg, 0, sizeof(xecfg)); |
| memset(&state, 0, sizeof(state)); |
| state.nmask = nmask; |
| state.sline = sline; |
| state.lno = 1; |
| state.num_parent = num_parent; |
| state.n = n; |
| |
| xdi_diff_outf(&parent_file, result_file, consume_line, &state, |
| &xpp, &xecfg); |
| free(parent_file.ptr); |
| |
| /* Assign line numbers for this parent. |
| * |
| * sline[lno].p_lno[n] records the first line number |
| * (counting from 1) for parent N if the final hunk display |
| * started by showing sline[lno] (possibly showing the lost |
| * lines attached to it first). |
| */ |
| for (lno = 0, p_lno = 1; lno <= cnt; lno++) { |
| struct lline *ll; |
| sline[lno].p_lno[n] = p_lno; |
| |
| /* How many lines would this sline advance the p_lno? */ |
| ll = sline[lno].lost_head; |
| while (ll) { |
| if (ll->parent_map & nmask) |
| p_lno++; /* '-' means parent had it */ |
| ll = ll->next; |
| } |
| if (lno < cnt && !(sline[lno].flag & nmask)) |
| p_lno++; /* no '+' means parent had it */ |
| } |
| sline[lno].p_lno[n] = p_lno; /* trailer */ |
| } |
| |
| static unsigned long context = 3; |
| static char combine_marker = '@'; |
| |
| static int interesting(struct sline *sline, unsigned long all_mask) |
| { |
| /* If some parents lost lines here, or if we have added to |
| * some parent, it is interesting. |
| */ |
| return ((sline->flag & all_mask) || sline->lost_head); |
| } |
| |
| static unsigned long adjust_hunk_tail(struct sline *sline, |
| unsigned long all_mask, |
| unsigned long hunk_begin, |
| unsigned long i) |
| { |
| /* i points at the first uninteresting line. If the last line |
| * of the hunk was interesting only because it has some |
| * deletion, then it is not all that interesting for the |
| * purpose of giving trailing context lines. This is because |
| * we output '-' line and then unmodified sline[i-1] itself in |
| * that case which gives us one extra context line. |
| */ |
| if ((hunk_begin + 1 <= i) && !(sline[i-1].flag & all_mask)) |
| i--; |
| return i; |
| } |
| |
| static unsigned long find_next(struct sline *sline, |
| unsigned long mark, |
| unsigned long i, |
| unsigned long cnt, |
| int look_for_uninteresting) |
| { |
| /* We have examined up to i-1 and are about to look at i. |
| * Find next interesting or uninteresting line. Here, |
| * "interesting" does not mean interesting(), but marked by |
| * the give_context() function below (i.e. it includes context |
| * lines that are not interesting to interesting() function |
| * that are surrounded by interesting() ones. |
| */ |
| while (i <= cnt) |
| if (look_for_uninteresting |
| ? !(sline[i].flag & mark) |
| : (sline[i].flag & mark)) |
| return i; |
| else |
| i++; |
| return i; |
| } |
| |
| static int give_context(struct sline *sline, unsigned long cnt, int num_parent) |
| { |
| unsigned long all_mask = (1UL<<num_parent) - 1; |
| unsigned long mark = (1UL<<num_parent); |
| unsigned long no_pre_delete = (2UL<<num_parent); |
| unsigned long i; |
| |
| /* Two groups of interesting lines may have a short gap of |
| * uninteresting lines. Connect such groups to give them a |
| * bit of context. |
| * |
| * We first start from what the interesting() function says, |
| * and mark them with "mark", and paint context lines with the |
| * mark. So interesting() would still say false for such context |
| * lines but they are treated as "interesting" in the end. |
| */ |
| i = find_next(sline, mark, 0, cnt, 0); |
| if (cnt < i) |
| return 0; |
| |
| while (i <= cnt) { |
| unsigned long j = (context < i) ? (i - context) : 0; |
| unsigned long k; |
| |
| /* Paint a few lines before the first interesting line. */ |
| while (j < i) |
| sline[j++].flag |= mark | no_pre_delete; |
| |
| again: |
| /* we know up to i is to be included. where does the |
| * next uninteresting one start? |
| */ |
| j = find_next(sline, mark, i, cnt, 1); |
| if (cnt < j) |
| break; /* the rest are all interesting */ |
| |
| /* lookahead context lines */ |
| k = find_next(sline, mark, j, cnt, 0); |
| j = adjust_hunk_tail(sline, all_mask, i, j); |
| |
| if (k < j + context) { |
| /* k is interesting and [j,k) are not, but |
| * paint them interesting because the gap is small. |
| */ |
| while (j < k) |
| sline[j++].flag |= mark; |
| i = k; |
| goto again; |
| } |
| |
| /* j is the first uninteresting line and there is |
| * no overlap beyond it within context lines. Paint |
| * the trailing edge a bit. |
| */ |
| i = k; |
| k = (j + context < cnt+1) ? j + context : cnt+1; |
| while (j < k) |
| sline[j++].flag |= mark; |
| } |
| return 1; |
| } |
| |
| static int make_hunks(struct sline *sline, unsigned long cnt, |
| int num_parent, int dense) |
| { |
| unsigned long all_mask = (1UL<<num_parent) - 1; |
| unsigned long mark = (1UL<<num_parent); |
| unsigned long i; |
| int has_interesting = 0; |
| |
| for (i = 0; i <= cnt; i++) { |
| if (interesting(&sline[i], all_mask)) |
| sline[i].flag |= mark; |
| else |
| sline[i].flag &= ~mark; |
| } |
| if (!dense) |
| return give_context(sline, cnt, num_parent); |
| |
| /* Look at each hunk, and if we have changes from only one |
| * parent, or the changes are the same from all but one |
| * parent, mark that uninteresting. |
| */ |
| i = 0; |
| while (i <= cnt) { |
| unsigned long j, hunk_begin, hunk_end; |
| unsigned long same_diff; |
| while (i <= cnt && !(sline[i].flag & mark)) |
| i++; |
| if (cnt < i) |
| break; /* No more interesting hunks */ |
| hunk_begin = i; |
| for (j = i + 1; j <= cnt; j++) { |
| if (!(sline[j].flag & mark)) { |
| /* Look beyond the end to see if there |
| * is an interesting line after this |
| * hunk within context span. |
| */ |
| unsigned long la; /* lookahead */ |
| int contin = 0; |
| la = adjust_hunk_tail(sline, all_mask, |
| hunk_begin, j); |
| la = (la + context < cnt + 1) ? |
| (la + context) : cnt + 1; |
| while (la && j <= --la) { |
| if (sline[la].flag & mark) { |
| contin = 1; |
| break; |
| } |
| } |
| if (!contin) |
| break; |
| j = la; |
| } |
| } |
| hunk_end = j; |
| |
| /* [i..hunk_end) are interesting. Now is it really |
| * interesting? We check if there are only two versions |
| * and the result matches one of them. That is, we look |
| * at: |
| * (+) line, which records lines added to which parents; |
| * this line appears in the result. |
| * (-) line, which records from what parents the line |
| * was removed; this line does not appear in the result. |
| * then check the set of parents the result has difference |
| * from, from all lines. If there are lines that has |
| * different set of parents that the result has differences |
| * from, that means we have more than two versions. |
| * |
| * Even when we have only two versions, if the result does |
| * not match any of the parents, the it should be considered |
| * interesting. In such a case, we would have all '+' line. |
| * After passing the above "two versions" test, that would |
| * appear as "the same set of parents" to be "all parents". |
| */ |
| same_diff = 0; |
| has_interesting = 0; |
| for (j = i; j < hunk_end && !has_interesting; j++) { |
| unsigned long this_diff = sline[j].flag & all_mask; |
| struct lline *ll = sline[j].lost_head; |
| if (this_diff) { |
| /* This has some changes. Is it the |
| * same as others? |
| */ |
| if (!same_diff) |
| same_diff = this_diff; |
| else if (same_diff != this_diff) { |
| has_interesting = 1; |
| break; |
| } |
| } |
| while (ll && !has_interesting) { |
| /* Lost this line from these parents; |
| * who are they? Are they the same? |
| */ |
| this_diff = ll->parent_map; |
| if (!same_diff) |
| same_diff = this_diff; |
| else if (same_diff != this_diff) { |
| has_interesting = 1; |
| } |
| ll = ll->next; |
| } |
| } |
| |
| if (!has_interesting && same_diff != all_mask) { |
| /* This hunk is not that interesting after all */ |
| for (j = hunk_begin; j < hunk_end; j++) |
| sline[j].flag &= ~mark; |
| } |
| i = hunk_end; |
| } |
| |
| has_interesting = give_context(sline, cnt, num_parent); |
| return has_interesting; |
| } |
| |
| static void show_parent_lno(struct sline *sline, unsigned long l0, unsigned long l1, int n, unsigned long null_context) |
| { |
| l0 = sline[l0].p_lno[n]; |
| l1 = sline[l1].p_lno[n]; |
| printf(" -%lu,%lu", l0, l1-l0-null_context); |
| } |
| |
| static int hunk_comment_line(const char *bol) |
| { |
| int ch; |
| |
| if (!bol) |
| return 0; |
| ch = *bol & 0xff; |
| return (isalpha(ch) || ch == '_' || ch == '$'); |
| } |
| |
| static void show_line_to_eol(const char *line, int len, const char *reset) |
| { |
| int saw_cr_at_eol = 0; |
| if (len < 0) |
| len = strlen(line); |
| saw_cr_at_eol = (len && line[len-1] == '\r'); |
| |
| printf("%.*s%s%s\n", len - saw_cr_at_eol, line, |
| reset, |
| saw_cr_at_eol ? "\r" : ""); |
| } |
| |
| static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent, |
| int use_color, int result_deleted) |
| { |
| unsigned long mark = (1UL<<num_parent); |
| unsigned long no_pre_delete = (2UL<<num_parent); |
| int i; |
| unsigned long lno = 0; |
| const char *c_frag = diff_get_color(use_color, DIFF_FRAGINFO); |
| const char *c_func = diff_get_color(use_color, DIFF_FUNCINFO); |
| const char *c_new = diff_get_color(use_color, DIFF_FILE_NEW); |
| const char *c_old = diff_get_color(use_color, DIFF_FILE_OLD); |
| const char *c_plain = diff_get_color(use_color, DIFF_PLAIN); |
| const char *c_reset = diff_get_color(use_color, DIFF_RESET); |
| |
| if (result_deleted) |
| return; /* result deleted */ |
| |
| while (1) { |
| unsigned long hunk_end; |
| unsigned long rlines; |
| const char *hunk_comment = NULL; |
| unsigned long null_context = 0; |
| |
| while (lno <= cnt && !(sline[lno].flag & mark)) { |
| if (hunk_comment_line(sline[lno].bol)) |
| hunk_comment = sline[lno].bol; |
| lno++; |
| } |
| if (cnt < lno) |
| break; |
| else { |
| for (hunk_end = lno + 1; hunk_end <= cnt; hunk_end++) |
| if (!(sline[hunk_end].flag & mark)) |
| break; |
| } |
| rlines = hunk_end - lno; |
| if (cnt < hunk_end) |
| rlines--; /* pointing at the last delete hunk */ |
| |
| if (!context) { |
| /* |
| * Even when running with --unified=0, all |
| * lines in the hunk needs to be processed in |
| * the loop below in order to show the |
| * deletion recorded in lost_head. However, |
| * we do not want to show the resulting line |
| * with all blank context markers in such a |
| * case. Compensate. |
| */ |
| unsigned long j; |
| for (j = lno; j < hunk_end; j++) |
| if (!(sline[j].flag & (mark-1))) |
| null_context++; |
| rlines -= null_context; |
| } |
| |
| fputs(c_frag, stdout); |
| for (i = 0; i <= num_parent; i++) putchar(combine_marker); |
| for (i = 0; i < num_parent; i++) |
| show_parent_lno(sline, lno, hunk_end, i, null_context); |
| printf(" +%lu,%lu ", lno+1, rlines); |
| for (i = 0; i <= num_parent; i++) putchar(combine_marker); |
| |
| if (hunk_comment) { |
| int comment_end = 0; |
| for (i = 0; i < 40; i++) { |
| int ch = hunk_comment[i] & 0xff; |
| if (!ch || ch == '\n') |
| break; |
| if (!isspace(ch)) |
| comment_end = i; |
| } |
| if (comment_end) |
| printf("%s%s %s%s", c_reset, |
| c_plain, c_reset, |
| c_func); |
| for (i = 0; i < comment_end; i++) |
| putchar(hunk_comment[i]); |
| } |
| |
| printf("%s\n", c_reset); |
| while (lno < hunk_end) { |
| struct lline *ll; |
| int j; |
| unsigned long p_mask; |
| struct sline *sl = &sline[lno++]; |
| ll = (sl->flag & no_pre_delete) ? NULL : sl->lost_head; |
| while (ll) { |
| fputs(c_old, stdout); |
| for (j = 0; j < num_parent; j++) { |
| if (ll->parent_map & (1UL<<j)) |
| putchar('-'); |
| else |
| putchar(' '); |
| } |
| show_line_to_eol(ll->line, -1, c_reset); |
| ll = ll->next; |
| } |
| if (cnt < lno) |
| break; |
| p_mask = 1; |
| if (!(sl->flag & (mark-1))) { |
| /* |
| * This sline was here to hang the |
| * lost lines in front of it. |
| */ |
| if (!context) |
| continue; |
| fputs(c_plain, stdout); |
| } |
| else |
| fputs(c_new, stdout); |
| for (j = 0; j < num_parent; j++) { |
| if (p_mask & sl->flag) |
| putchar('+'); |
| else |
| putchar(' '); |
| p_mask <<= 1; |
| } |
| show_line_to_eol(sl->bol, sl->len, c_reset); |
| } |
| } |
| } |
| |
| static void reuse_combine_diff(struct sline *sline, unsigned long cnt, |
| int i, int j) |
| { |
| /* We have already examined parent j and we know parent i |
| * and parent j are the same, so reuse the combined result |
| * of parent j for parent i. |
| */ |
| unsigned long lno, imask, jmask; |
| imask = (1UL<<i); |
| jmask = (1UL<<j); |
| |
| for (lno = 0; lno <= cnt; lno++) { |
| struct lline *ll = sline->lost_head; |
| sline->p_lno[i] = sline->p_lno[j]; |
| while (ll) { |
| if (ll->parent_map & jmask) |
| ll->parent_map |= imask; |
| ll = ll->next; |
| } |
| if (sline->flag & jmask) |
| sline->flag |= imask; |
| sline++; |
| } |
| /* the overall size of the file (sline[cnt]) */ |
| sline->p_lno[i] = sline->p_lno[j]; |
| } |
| |
| static void dump_quoted_path(const char *head, |
| const char *prefix, |
| const char *path, |
| const char *c_meta, const char *c_reset) |
| { |
| static struct strbuf buf = STRBUF_INIT; |
| |
| strbuf_reset(&buf); |
| strbuf_addstr(&buf, c_meta); |
| strbuf_addstr(&buf, head); |
| quote_two_c_style(&buf, prefix, path, 0); |
| strbuf_addstr(&buf, c_reset); |
| puts(buf.buf); |
| } |
| |
| static void show_combined_header(struct combine_diff_path *elem, |
| int num_parent, |
| int dense, |
| struct rev_info *rev, |
| int mode_differs, |
| int show_file_header) |
| { |
| struct diff_options *opt = &rev->diffopt; |
| int abbrev = DIFF_OPT_TST(opt, FULL_INDEX) ? 40 : DEFAULT_ABBREV; |
| const char *a_prefix = opt->a_prefix ? opt->a_prefix : "a/"; |
| const char *b_prefix = opt->b_prefix ? opt->b_prefix : "b/"; |
| const char *c_meta = diff_get_color_opt(opt, DIFF_METAINFO); |
| const char *c_reset = diff_get_color_opt(opt, DIFF_RESET); |
| const char *abb; |
| int added = 0; |
| int deleted = 0; |
| int i; |
| |
| if (rev->loginfo && !rev->no_commit_id) |
| show_log(rev); |
| |
| dump_quoted_path(dense ? "diff --cc " : "diff --combined ", |
| "", elem->path, c_meta, c_reset); |
| printf("%sindex ", c_meta); |
| for (i = 0; i < num_parent; i++) { |
| abb = find_unique_abbrev(elem->parent[i].sha1, |
| abbrev); |
| printf("%s%s", i ? "," : "", abb); |
| } |
| abb = find_unique_abbrev(elem->sha1, abbrev); |
| printf("..%s%s\n", abb, c_reset); |
| |
| if (mode_differs) { |
| deleted = !elem->mode; |
| |
| /* We say it was added if nobody had it */ |
| added = !deleted; |
| for (i = 0; added && i < num_parent; i++) |
| if (elem->parent[i].status != |
| DIFF_STATUS_ADDED) |
| added = 0; |
| if (added) |
| printf("%snew file mode %06o", |
| c_meta, elem->mode); |
| else { |
| if (deleted) |
| printf("%sdeleted file ", c_meta); |
| printf("mode "); |
| for (i = 0; i < num_parent; i++) { |
| printf("%s%06o", i ? "," : "", |
| elem->parent[i].mode); |
| } |
| if (elem->mode) |
| printf("..%06o", elem->mode); |
| } |
| printf("%s\n", c_reset); |
| } |
| |
| if (!show_file_header) |
| return; |
| |
| if (added) |
| dump_quoted_path("--- ", "", "/dev/null", |
| c_meta, c_reset); |
| else |
| dump_quoted_path("--- ", a_prefix, elem->path, |
| c_meta, c_reset); |
| if (deleted) |
| dump_quoted_path("+++ ", "", "/dev/null", |
| c_meta, c_reset); |
| else |
| dump_quoted_path("+++ ", b_prefix, elem->path, |
| c_meta, c_reset); |
| } |
| |
| static void show_patch_diff(struct combine_diff_path *elem, int num_parent, |
| int dense, int working_tree_file, |
| struct rev_info *rev) |
| { |
| struct diff_options *opt = &rev->diffopt; |
| unsigned long result_size, cnt, lno; |
| int result_deleted = 0; |
| char *result, *cp; |
| struct sline *sline; /* survived lines */ |
| int mode_differs = 0; |
| int i, show_hunks; |
| mmfile_t result_file; |
| struct userdiff_driver *userdiff; |
| struct userdiff_driver *textconv = NULL; |
| int is_binary; |
| |
| context = opt->context; |
| userdiff = userdiff_find_by_path(elem->path); |
| if (!userdiff) |
| userdiff = userdiff_find_by_name("default"); |
| if (DIFF_OPT_TST(opt, ALLOW_TEXTCONV)) |
| textconv = userdiff_get_textconv(userdiff); |
| |
| /* Read the result of merge first */ |
| if (!working_tree_file) |
| result = grab_blob(elem->sha1, elem->mode, &result_size, |
| textconv, elem->path); |
| else { |
| /* Used by diff-tree to read from the working tree */ |
| struct stat st; |
| int fd = -1; |
| |
| if (lstat(elem->path, &st) < 0) |
| goto deleted_file; |
| |
| if (S_ISLNK(st.st_mode)) { |
| struct strbuf buf = STRBUF_INIT; |
| |
| if (strbuf_readlink(&buf, elem->path, st.st_size) < 0) { |
| error("readlink(%s): %s", elem->path, |
| strerror(errno)); |
| return; |
| } |
| result_size = buf.len; |
| result = strbuf_detach(&buf, NULL); |
| elem->mode = canon_mode(st.st_mode); |
| } else if (S_ISDIR(st.st_mode)) { |
| unsigned char sha1[20]; |
| if (resolve_gitlink_ref(elem->path, "HEAD", sha1) < 0) |
| result = grab_blob(elem->sha1, elem->mode, |
| &result_size, NULL, NULL); |
| else |
| result = grab_blob(sha1, elem->mode, |
| &result_size, NULL, NULL); |
| } else if (textconv) { |
| struct diff_filespec *df = alloc_filespec(elem->path); |
| fill_filespec(df, null_sha1, st.st_mode); |
| result_size = fill_textconv(textconv, df, &result); |
| free_filespec(df); |
| } else if (0 <= (fd = open(elem->path, O_RDONLY))) { |
| size_t len = xsize_t(st.st_size); |
| ssize_t done; |
| int is_file, i; |
| |
| elem->mode = canon_mode(st.st_mode); |
| /* if symlinks don't work, assume symlink if all parents |
| * are symlinks |
| */ |
| is_file = has_symlinks; |
| for (i = 0; !is_file && i < num_parent; i++) |
| is_file = !S_ISLNK(elem->parent[i].mode); |
| if (!is_file) |
| elem->mode = canon_mode(S_IFLNK); |
| |
| result_size = len; |
| result = xmalloc(len + 1); |
| |
| done = read_in_full(fd, result, len); |
| if (done < 0) |
| die_errno("read error '%s'", elem->path); |
| else if (done < len) |
| die("early EOF '%s'", elem->path); |
| |
| result[len] = 0; |
| |
| /* If not a fake symlink, apply filters, e.g. autocrlf */ |
| if (is_file) { |
| struct strbuf buf = STRBUF_INIT; |
| |
| if (convert_to_git(elem->path, result, len, &buf, safe_crlf)) { |
| free(result); |
| result = strbuf_detach(&buf, &len); |
| result_size = len; |
| } |
| } |
| } |
| else { |
| deleted_file: |
| result_deleted = 1; |
| result_size = 0; |
| elem->mode = 0; |
| result = xcalloc(1, 1); |
| } |
| |
| if (0 <= fd) |
| close(fd); |
| } |
| |
| for (i = 0; i < num_parent; i++) { |
| if (elem->parent[i].mode != elem->mode) { |
| mode_differs = 1; |
| break; |
| } |
| } |
| |
| if (textconv) |
| is_binary = 0; |
| else if (userdiff->binary != -1) |
| is_binary = userdiff->binary; |
| else { |
| is_binary = buffer_is_binary(result, result_size); |
| for (i = 0; !is_binary && i < num_parent; i++) { |
| char *buf; |
| unsigned long size; |
| buf = grab_blob(elem->parent[i].sha1, |
| elem->parent[i].mode, |
| &size, NULL, NULL); |
| if (buffer_is_binary(buf, size)) |
| is_binary = 1; |
| free(buf); |
| } |
| } |
| if (is_binary) { |
| show_combined_header(elem, num_parent, dense, rev, |
| mode_differs, 0); |
| printf("Binary files differ\n"); |
| free(result); |
| return; |
| } |
| |
| for (cnt = 0, cp = result; cp < result + result_size; cp++) { |
| if (*cp == '\n') |
| cnt++; |
| } |
| if (result_size && result[result_size-1] != '\n') |
| cnt++; /* incomplete line */ |
| |
| sline = xcalloc(cnt+2, sizeof(*sline)); |
| sline[0].bol = result; |
| for (lno = 0; lno <= cnt + 1; lno++) { |
| sline[lno].lost_tail = &sline[lno].lost_head; |
| sline[lno].flag = 0; |
| } |
| for (lno = 0, cp = result; cp < result + result_size; cp++) { |
| if (*cp == '\n') { |
| sline[lno].len = cp - sline[lno].bol; |
| lno++; |
| if (lno < cnt) |
| sline[lno].bol = cp + 1; |
| } |
| } |
| if (result_size && result[result_size-1] != '\n') |
| sline[cnt-1].len = result_size - (sline[cnt-1].bol - result); |
| |
| result_file.ptr = result; |
| result_file.size = result_size; |
| |
| /* Even p_lno[cnt+1] is valid -- that is for the end line number |
| * for deletion hunk at the end. |
| */ |
| sline[0].p_lno = xcalloc((cnt+2) * num_parent, sizeof(unsigned long)); |
| for (lno = 0; lno <= cnt; lno++) |
| sline[lno+1].p_lno = sline[lno].p_lno + num_parent; |
| |
| for (i = 0; i < num_parent; i++) { |
| int j; |
| for (j = 0; j < i; j++) { |
| if (!hashcmp(elem->parent[i].sha1, |
| elem->parent[j].sha1)) { |
| reuse_combine_diff(sline, cnt, i, j); |
| break; |
| } |
| } |
| if (i <= j) |
| combine_diff(elem->parent[i].sha1, |
| elem->parent[i].mode, |
| &result_file, sline, |
| cnt, i, num_parent, result_deleted, |
| textconv, elem->path); |
| } |
| |
| show_hunks = make_hunks(sline, cnt, num_parent, dense); |
| |
| if (show_hunks || mode_differs || working_tree_file) { |
| show_combined_header(elem, num_parent, dense, rev, |
| mode_differs, 1); |
| dump_sline(sline, cnt, num_parent, |
| opt->use_color, result_deleted); |
| } |
| free(result); |
| |
| for (lno = 0; lno < cnt; lno++) { |
| if (sline[lno].lost_head) { |
| struct lline *ll = sline[lno].lost_head; |
| while (ll) { |
| struct lline *tmp = ll; |
| ll = ll->next; |
| free(tmp); |
| } |
| } |
| } |
| free(sline[0].p_lno); |
| free(sline); |
| } |
| |
| #define COLONS "::::::::::::::::::::::::::::::::" |
| |
| static void show_raw_diff(struct combine_diff_path *p, int num_parent, struct rev_info *rev) |
| { |
| struct diff_options *opt = &rev->diffopt; |
| int i, offset; |
| const char *prefix; |
| int line_termination, inter_name_termination; |
| |
| line_termination = opt->line_termination; |
| inter_name_termination = '\t'; |
| if (!line_termination) |
| inter_name_termination = 0; |
| |
| if (rev->loginfo && !rev->no_commit_id) |
| show_log(rev); |
| |
| if (opt->output_format & DIFF_FORMAT_RAW) { |
| offset = strlen(COLONS) - num_parent; |
| if (offset < 0) |
| offset = 0; |
| prefix = COLONS + offset; |
| |
| /* Show the modes */ |
| for (i = 0; i < num_parent; i++) { |
| printf("%s%06o", prefix, p->parent[i].mode); |
| prefix = " "; |
| } |
| printf("%s%06o", prefix, p->mode); |
| |
| /* Show sha1's */ |
| for (i = 0; i < num_parent; i++) |
| printf(" %s", diff_unique_abbrev(p->parent[i].sha1, |
| opt->abbrev)); |
| printf(" %s ", diff_unique_abbrev(p->sha1, opt->abbrev)); |
| } |
| |
| if (opt->output_format & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS)) { |
| for (i = 0; i < num_parent; i++) |
| putchar(p->parent[i].status); |
| putchar(inter_name_termination); |
| } |
| |
| write_name_quoted(p->path, stdout, line_termination); |
| } |
| |
| /* |
| * The result (p->elem) is from the working tree and their |
| * parents are typically from multiple stages during a merge |
| * (i.e. diff-files) or the state in HEAD and in the index |
| * (i.e. diff-index). |
| */ |
| void show_combined_diff(struct combine_diff_path *p, |
| int num_parent, |
| int dense, |
| struct rev_info *rev) |
| { |
| struct diff_options *opt = &rev->diffopt; |
| if (!p->len) |
| return; |
| if (opt->output_format & (DIFF_FORMAT_RAW | |
| DIFF_FORMAT_NAME | |
| DIFF_FORMAT_NAME_STATUS)) |
| show_raw_diff(p, num_parent, rev); |
| else if (opt->output_format & DIFF_FORMAT_PATCH) |
| show_patch_diff(p, num_parent, dense, 1, rev); |
| } |
| |
| static void free_combined_pair(struct diff_filepair *pair) |
| { |
| free(pair->two); |
| free(pair); |
| } |
| |
| /* |
| * A combine_diff_path expresses N parents on the LHS against 1 merge |
| * result. Synthesize a diff_filepair that has N entries on the "one" |
| * side and 1 entry on the "two" side. |
| * |
| * In the future, we might want to add more data to combine_diff_path |
| * so that we can fill fields we are ignoring (most notably, size) here, |
| * but currently nobody uses it, so this should suffice for now. |
| */ |
| static struct diff_filepair *combined_pair(struct combine_diff_path *p, |
| int num_parent) |
| { |
| int i; |
| struct diff_filepair *pair; |
| struct diff_filespec *pool; |
| |
| pair = xmalloc(sizeof(*pair)); |
| pool = xcalloc(num_parent + 1, sizeof(struct diff_filespec)); |
| pair->one = pool + 1; |
| pair->two = pool; |
| |
| for (i = 0; i < num_parent; i++) { |
| pair->one[i].path = p->path; |
| pair->one[i].mode = p->parent[i].mode; |
| hashcpy(pair->one[i].sha1, p->parent[i].sha1); |
| pair->one[i].sha1_valid = !is_null_sha1(p->parent[i].sha1); |
| pair->one[i].has_more_entries = 1; |
| } |
| pair->one[num_parent - 1].has_more_entries = 0; |
| |
| pair->two->path = p->path; |
| pair->two->mode = p->mode; |
| hashcpy(pair->two->sha1, p->sha1); |
| pair->two->sha1_valid = !is_null_sha1(p->sha1); |
| return pair; |
| } |
| |
| static void handle_combined_callback(struct diff_options *opt, |
| struct combine_diff_path *paths, |
| int num_parent, |
| int num_paths) |
| { |
| struct combine_diff_path *p; |
| struct diff_queue_struct q; |
| int i; |
| |
| q.queue = xcalloc(num_paths, sizeof(struct diff_filepair *)); |
| q.alloc = num_paths; |
| q.nr = num_paths; |
| for (i = 0, p = paths; p; p = p->next) { |
| if (!p->len) |
| continue; |
| q.queue[i++] = combined_pair(p, num_parent); |
| } |
| opt->format_callback(&q, opt, opt->format_callback_data); |
| for (i = 0; i < num_paths; i++) |
| free_combined_pair(q.queue[i]); |
| free(q.queue); |
| } |
| |
| void diff_tree_combined(const unsigned char *sha1, |
| const struct sha1_array *parents, |
| int dense, |
| struct rev_info *rev) |
| { |
| struct diff_options *opt = &rev->diffopt; |
| struct diff_options diffopts; |
| struct combine_diff_path *p, *paths = NULL; |
| int i, num_paths, needsep, show_log_first, num_parent = parents->nr; |
| |
| diffopts = *opt; |
| diffopts.output_format = DIFF_FORMAT_NO_OUTPUT; |
| DIFF_OPT_SET(&diffopts, RECURSIVE); |
| DIFF_OPT_CLR(&diffopts, ALLOW_EXTERNAL); |
| |
| show_log_first = !!rev->loginfo && !rev->no_commit_id; |
| needsep = 0; |
| /* find set of paths that everybody touches */ |
| for (i = 0; i < num_parent; i++) { |
| /* show stat against the first parent even |
| * when doing combined diff. |
| */ |
| int stat_opt = (opt->output_format & |
| (DIFF_FORMAT_NUMSTAT|DIFF_FORMAT_DIFFSTAT)); |
| if (i == 0 && stat_opt) |
| diffopts.output_format = stat_opt; |
| else |
| diffopts.output_format = DIFF_FORMAT_NO_OUTPUT; |
| diff_tree_sha1(parents->sha1[i], sha1, "", &diffopts); |
| diffcore_std(&diffopts); |
| paths = intersect_paths(paths, i, num_parent); |
| |
| if (show_log_first && i == 0) { |
| show_log(rev); |
| if (rev->verbose_header && opt->output_format) |
| putchar(opt->line_termination); |
| } |
| diff_flush(&diffopts); |
| } |
| |
| /* find out surviving paths */ |
| for (num_paths = 0, p = paths; p; p = p->next) { |
| if (p->len) |
| num_paths++; |
| } |
| if (num_paths) { |
| if (opt->output_format & (DIFF_FORMAT_RAW | |
| DIFF_FORMAT_NAME | |
| DIFF_FORMAT_NAME_STATUS)) { |
| for (p = paths; p; p = p->next) { |
| if (p->len) |
| show_raw_diff(p, num_parent, rev); |
| } |
| needsep = 1; |
| } |
| else if (opt->output_format & |
| (DIFF_FORMAT_NUMSTAT|DIFF_FORMAT_DIFFSTAT)) |
| needsep = 1; |
| else if (opt->output_format & DIFF_FORMAT_CALLBACK) |
| handle_combined_callback(opt, paths, num_parent, num_paths); |
| |
| if (opt->output_format & DIFF_FORMAT_PATCH) { |
| if (needsep) |
| putchar(opt->line_termination); |
| for (p = paths; p; p = p->next) { |
| if (p->len) |
| show_patch_diff(p, num_parent, dense, |
| 0, rev); |
| } |
| } |
| } |
| |
| /* Clean things up */ |
| while (paths) { |
| struct combine_diff_path *tmp = paths; |
| paths = paths->next; |
| free(tmp); |
| } |
| } |
| |
| void diff_tree_combined_merge(const struct commit *commit, int dense, |
| struct rev_info *rev) |
| { |
| struct commit_list *parent = commit->parents; |
| struct sha1_array parents = SHA1_ARRAY_INIT; |
| |
| while (parent) { |
| sha1_array_append(&parents, parent->item->object.sha1); |
| parent = parent->next; |
| } |
| diff_tree_combined(commit->object.sha1, &parents, dense, rev); |
| sha1_array_clear(&parents); |
| } |