diff options
| -rw-r--r-- | add-patch.c | 215 | ||||
| -rwxr-xr-x | t/t3701-add-interactive.sh | 12 |
2 files changed, 225 insertions, 2 deletions
diff --git a/add-patch.c b/add-patch.c index 171025b..2d34ddd 100644 --- a/add-patch.c +++ b/add-patch.c @@ -28,7 +28,7 @@ struct hunk_header { }; struct hunk { - size_t start, end, colored_start, colored_end; + size_t start, end, colored_start, colored_end, splittable_into; enum { UNDECIDED_HUNK = 0, SKIP_HUNK, USE_HUNK } use; struct hunk_header header; }; @@ -155,7 +155,7 @@ static int parse_diff(struct add_p_state *s, const struct pathspec *ps) struct argv_array args = ARGV_ARRAY_INIT; struct strbuf *plain = &s->plain, *colored = NULL; struct child_process cp = CHILD_PROCESS_INIT; - char *p, *pend, *colored_p = NULL, *colored_pend = NULL; + char *p, *pend, *colored_p = NULL, *colored_pend = NULL, marker = '\0'; size_t file_diff_alloc = 0, i, color_arg_index; struct file_diff *file_diff = NULL; struct hunk *hunk = NULL; @@ -217,6 +217,7 @@ static int parse_diff(struct add_p_state *s, const struct pathspec *ps) hunk->start = p - plain->buf; if (colored_p) hunk->colored_start = colored_p - colored->buf; + marker = '\0'; } else if (p == plain->buf) BUG("diff starts with unexpected line:\n" "%.*s\n", (int)(eol - p), p); @@ -225,6 +226,13 @@ static int parse_diff(struct add_p_state *s, const struct pathspec *ps) else if (starts_with(p, "@@ ") || (hunk == &file_diff->head && skip_prefix(p, "deleted file", &deleted))) { + if (marker == '-' || marker == '+') + /* + * Should not happen; previous hunk did not end + * in a context line? Handle it anyway. + */ + hunk->splittable_into++; + file_diff->hunk_nr++; ALLOC_GROW(file_diff->hunk, file_diff->hunk_nr, file_diff->hunk_alloc); @@ -239,6 +247,12 @@ static int parse_diff(struct add_p_state *s, const struct pathspec *ps) file_diff->deleted = 1; else if (parse_hunk_header(s, hunk) < 0) return -1; + + /* + * Start counting into how many hunks this one can be + * split + */ + marker = *p; } else if (hunk == &file_diff->head && skip_prefix(p, "old mode ", &mode_change) && is_octal(mode_change, eol - mode_change)) { @@ -286,6 +300,11 @@ static int parse_diff(struct add_p_state *s, const struct pathspec *ps) (int)(eol - (plain->buf + file_diff->head.start)), plain->buf + file_diff->head.start); + if ((marker == '-' || marker == '+') && *p == ' ') + hunk->splittable_into++; + if (marker && *p != '\\') + marker = *p; + p = eol == pend ? pend : eol + 1; hunk->end = p - plain->buf; @@ -311,9 +330,30 @@ static int parse_diff(struct add_p_state *s, const struct pathspec *ps) } } + if (marker == '-' || marker == '+') + /* + * Last hunk ended in non-context line (i.e. it appended lines + * to the file, so there are no trailing context lines). + */ + hunk->splittable_into++; + return 0; } +static size_t find_next_line(struct strbuf *sb, size_t offset) +{ + char *eol; + + if (offset >= sb->len) + BUG("looking for next line beyond buffer (%d >= %d)\n%s", + (int)offset, (int)sb->len, sb->buf); + + eol = memchr(sb->buf + offset, '\n', sb->len - offset); + if (!eol) + return sb->len; + return eol - sb->buf + 1; +} + static void render_hunk(struct add_p_state *s, struct hunk *hunk, ssize_t delta, int colored, struct strbuf *out) { @@ -412,6 +452,165 @@ static void reassemble_patch(struct add_p_state *s, } } +static int split_hunk(struct add_p_state *s, struct file_diff *file_diff, + size_t hunk_index) +{ + int colored = !!s->colored.len, first = 1; + struct hunk *hunk = file_diff->hunk + hunk_index; + size_t splittable_into; + size_t end, colored_end, current, colored_current = 0, context_line_count; + struct hunk_header remaining, *header; + char marker, ch; + + if (hunk_index >= file_diff->hunk_nr) + BUG("invalid hunk index: %d (must be >= 0 and < %d)", + (int)hunk_index, (int)file_diff->hunk_nr); + + if (hunk->splittable_into < 2) + return 0; + splittable_into = hunk->splittable_into; + + end = hunk->end; + colored_end = hunk->colored_end; + + remaining = hunk->header; + + file_diff->hunk_nr += splittable_into - 1; + ALLOC_GROW(file_diff->hunk, file_diff->hunk_nr, file_diff->hunk_alloc); + if (hunk_index + splittable_into < file_diff->hunk_nr) + memmove(file_diff->hunk + hunk_index + splittable_into, + file_diff->hunk + hunk_index + 1, + (file_diff->hunk_nr - hunk_index - splittable_into) + * sizeof(*hunk)); + hunk = file_diff->hunk + hunk_index; + hunk->splittable_into = 1; + memset(hunk + 1, 0, (splittable_into - 1) * sizeof(*hunk)); + + header = &hunk->header; + header->old_count = header->new_count = 0; + + current = hunk->start; + if (colored) + colored_current = hunk->colored_start; + marker = '\0'; + context_line_count = 0; + + while (splittable_into > 1) { + ch = s->plain.buf[current]; + + if (!ch) + BUG("buffer overrun while splitting hunks"); + + /* + * Is this the first context line after a chain of +/- lines? + * Then record the start of the next split hunk. + */ + if ((marker == '-' || marker == '+') && ch == ' ') { + first = 0; + hunk[1].start = current; + if (colored) + hunk[1].colored_start = colored_current; + context_line_count = 0; + } + + /* + * Was the previous line a +/- one? Alternatively, is this the + * first line (and not a +/- one)? + * + * Then just increment the appropriate counter and continue + * with the next line. + */ + if (marker != ' ' || (ch != '-' && ch != '+')) { +next_hunk_line: + /* Comment lines are attached to the previous line */ + if (ch == '\\') + ch = marker ? marker : ' '; + + /* current hunk not done yet */ + if (ch == ' ') + context_line_count++; + else if (ch == '-') + header->old_count++; + else if (ch == '+') + header->new_count++; + else + BUG("unhandled diff marker: '%c'", ch); + marker = ch; + current = find_next_line(&s->plain, current); + if (colored) + colored_current = + find_next_line(&s->colored, + colored_current); + continue; + } + + /* + * We got us the start of a new hunk! + * + * This is a context line, so it is shared with the previous + * hunk, if any. + */ + + if (first) { + if (header->old_count || header->new_count) + BUG("counts are off: %d/%d", + (int)header->old_count, + (int)header->new_count); + + header->old_count = context_line_count; + header->new_count = context_line_count; + context_line_count = 0; + first = 0; + goto next_hunk_line; + } + + remaining.old_offset += header->old_count; + remaining.old_count -= header->old_count; + remaining.new_offset += header->new_count; + remaining.new_count -= header->new_count; + + /* initialize next hunk header's offsets */ + hunk[1].header.old_offset = + header->old_offset + header->old_count; + hunk[1].header.new_offset = + header->new_offset + header->new_count; + + /* add one split hunk */ + header->old_count += context_line_count; + header->new_count += context_line_count; + + hunk->end = current; + if (colored) + hunk->colored_end = colored_current; + + hunk++; + hunk->splittable_into = 1; + hunk->use = hunk[-1].use; + header = &hunk->header; + + header->old_count = header->new_count = context_line_count; + context_line_count = 0; + + splittable_into--; + marker = ch; + } + + /* last hunk simply gets the rest */ + if (header->old_offset != remaining.old_offset) + BUG("miscounted old_offset: %lu != %lu", + header->old_offset, remaining.old_offset); + if (header->new_offset != remaining.new_offset) + BUG("miscounted new_offset: %lu != %lu", + header->new_offset, remaining.new_offset); + header->old_count = remaining.old_count; + header->new_count = remaining.new_count; + hunk->end = end; + if (colored) + hunk->colored_end = colored_end; + + return 0; +} + static const char help_patch_text[] = N_("y - stage this hunk\n" "n - do not stage this hunk\n" @@ -421,6 +620,7 @@ N_("y - stage this hunk\n" "J - leave this hunk undecided, see next hunk\n" "k - leave this hunk undecided, see previous undecided hunk\n" "K - leave this hunk undecided, see previous hunk\n" + "s - split the current hunk into smaller hunks\n" "? - print help\n"); static int patch_update_file(struct add_p_state *s, @@ -477,6 +677,8 @@ static int patch_update_file(struct add_p_state *s, strbuf_addstr(&s->buf, ",j"); if (hunk_index + 1 < file_diff->hunk_nr) strbuf_addstr(&s->buf, ",J"); + if (hunk->splittable_into > 1) + strbuf_addstr(&s->buf, ",s"); if (file_diff->deleted) prompt_mode_type = PROMPT_DELETION; @@ -539,6 +741,15 @@ soft_increment: hunk_index = undecided_next; else err(s, _("No next hunk")); + } else if (s->answer.buf[0] == 's') { + size_t splittable_into = hunk->splittable_into; + if (splittable_into < 2) + err(s, _("Sorry, cannot split this hunk")); + else if (!split_hunk(s, file_diff, + hunk - file_diff->hunk)) + color_fprintf_ln(stdout, s->s.header_color, + _("Split into %d hunks."), + (int)splittable_into); } else color_fprintf(stdout, s->s.help_color, _(help_patch_text)); diff --git a/t/t3701-add-interactive.sh b/t/t3701-add-interactive.sh index 5db6432..fe383be 100755 --- a/t/t3701-add-interactive.sh +++ b/t/t3701-add-interactive.sh @@ -442,6 +442,18 @@ test_expect_failure 'split hunk "add -p (no, yes, edit)"' ' ! grep "^+31" actual ' +test_expect_success 'split hunk with incomplete line at end' ' + git reset --hard && + printf "missing LF" >>test && + git add test && + test_write_lines before 10 20 30 40 50 60 70 >test && + git grep --cached missing && + test_write_lines s n y q | git add -p && + test_must_fail git grep --cached missing && + git grep before && + test_must_fail git grep --cached before +' + test_expect_failure 'edit, adding lines to the first hunk' ' test_write_lines 10 11 20 30 40 50 51 60 >test && git reset && |