/* ui-diff.c: show diff between two blobs * * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com> * * Licensed under GNU General Public License v2 * (see COPYING for full license text) */ #include "cgit.h" #include "ui-diff.h" #include "html.h" #include "ui-shared.h" #include "ui-ssdiff.h" unsigned char old_rev_sha1[20]; unsigned char new_rev_sha1[20]; static int files, slots; static int total_adds, total_rems, max_changes; static int lines_added, lines_removed; static struct fileinfo { char status; unsigned char old_sha1[20]; unsigned char new_sha1[20]; unsigned short old_mode; unsigned short new_mode; char *old_path; char *new_path; unsigned int added; unsigned int removed; unsigned long old_size; unsigned long new_size; unsigned int binary:1; } *items; static int use_ssdiff = 0; static struct diff_filepair *current_filepair; static const char *current_prefix; struct diff_filespec *cgit_get_current_old_file(void) { return current_filepair->one; } struct diff_filespec *cgit_get_current_new_file(void) { return current_filepair->two; } static void print_fileinfo(struct fileinfo *info) { char *class; switch (info->status) { case DIFF_STATUS_ADDED: class = "add"; break; case DIFF_STATUS_COPIED: class = "cpy"; break; case DIFF_STATUS_DELETED: class = "del"; break; case DIFF_STATUS_MODIFIED: class = "upd"; break; case DIFF_STATUS_RENAMED: class = "mov"; break; case DIFF_STATUS_TYPE_CHANGED: class = "typ"; break; case DIFF_STATUS_UNKNOWN: class = "unk"; break; case DIFF_STATUS_UNMERGED: class = "stg"; break; default: die("bug: unhandled diff status %c", info->status); } html("<tr>"); htmlf("<td class='mode'>"); if (is_null_sha1(info->new_sha1)) { cgit_print_filemode(info->old_mode); } else { cgit_print_filemode(info->new_mode); } if (info->old_mode != info->new_mode && !is_null_sha1(info->old_sha1) && !is_null_sha1(info->new_sha1)) { html("<span class='modechange'>["); cgit_print_filemode(info->old_mode); html("]</span>"); } htmlf("</td><td class='%s'>", class); cgit_diff_link(info->new_path, NULL, NULL, ctx.qry.head, ctx.qry.sha1, ctx.qry.sha2, info->new_path); if (info->status == DIFF_STATUS_COPIED || info->status == DIFF_STATUS_RENAMED) { htmlf(" (%s from ", info->status == DIFF_STATUS_COPIED ? "copied" : "renamed"); html_txt(info->old_path); html(")"); } html("</td><td class='right'>"); if (info->binary) { htmlf("bin</td><td class='graph'>%ld -> %ld bytes", info->old_size, info->new_size); return; } htmlf("%d", info->added + info->removed); html("</td><td class='graph'>"); htmlf("<table summary='file diffstat' width='%d%%'><tr>", (max_changes > 100 ? 100 : max_changes)); htmlf("<td class='add' style='width: %.1f%%;'/>", info->added * 100.0 / max_changes); htmlf("<td class='rem' style='width: %.1f%%;'/>", info->removed * 100.0 / max_changes); htmlf("<td class='none' style='width: %.1f%%;'/>", (max_changes - info->removed - info->added) * 100.0 / max_changes); html("</tr></table></td></tr>\n"); } static void count_diff_lines(char *line, int len) { if (line && (len > 0)) { if (line[0] == '+') lines_added++; else if (line[0] == '-') lines_removed++; } } static int show_filepair(struct diff_filepair *pair) { /* Always show if we have no limiting prefix. */ if (!current_prefix) return 1; /* Show if either path in the pair begins with the prefix. */ if (starts_with(pair->one->path, current_prefix) || starts_with(pair->two->path, current_prefix)) return 1; /* Otherwise we don't want to show this filepair. */ return 0; } static void inspect_filepair(struct diff_filepair *pair) { int binary = 0; unsigned long old_size = 0; unsigned long new_size = 0; if (!show_filepair(pair)) return; files++; lines_added = 0; lines_removed = 0; cgit_diff_files(pair->one->sha1, pair->two->sha1, &old_size, &new_size, &binary, 0, ctx.qry.ignorews, count_diff_lines); if (files >= slots) { if (slots == 0) slots = 4; else slots = slots * 2; items = xrealloc(items, slots * sizeof(struct fileinfo)); } items[files-1].status = pair->status; hashcpy(items[files-1].old_sha1, pair->one->sha1); hashcpy(items[files-1].new_sha1, pair->two->sha1); items[files-1].old_mode = pair->one->mode; items[files-1].new_mode = pair->two->mode; items[files-1].old_path = xstrdup(pair->one->path); items[files-1].new_path = xstrdup(pair->two->path); items[files-1].added = lines_added; items[files-1].removed = lines_removed; items[files-1].old_size = old_size; items[files-1].new_size = new_size; items[files-1].binary = binary; if (lines_added + lines_removed > max_changes) max_changes = lines_added + lines_removed; total_adds += lines_added; total_rems += lines_removed; } static void cgit_print_diffstat(const unsigned char *old_sha1, const unsigned char *new_sha1, const char *prefix) { int i; html("<div class='diffstat-header'>"); cgit_diff_link("Diffstat", NULL, NULL, ctx.qry.head, ctx.qry.sha1, ctx.qry.sha2, NULL); if (prefix) { html(" (limited to '"); html_txt(prefix); html("')"); } html("</div>"); html("<table summary='diffstat' class='diffstat'>"); max_changes = 0; cgit_diff_tree(old_sha1, new_sha1, inspect_filepair, prefix, ctx.qry.ignorews); for (i = 0; i<files; i++) print_fileinfo(&items[i]); html("</table>"); html("<div class='diffstat-summary'>"); htmlf("%d files changed, %d insertions, %d deletions", files, total_adds, total_rems); html("</div>"); } /* * print a single line returned from xdiff */ static void print_line(char *line, int len) { char *class = "ctx"; char c = line[len-1]; if (line[0] == '+') class = "add"; else if (line[0] == '-') class = "del"; else if (line[0] == '@') class = "hunk"; htmlf("<div class='%s'>", class); line[len-1] = '\0'; html_txt(line); html("</div>"); line[len-1] = c; } static void header(unsigned char *sha1, char *path1, int mode1, unsigned char *sha2, char *path2, int mode2) { char *abbrev1, *abbrev2; int subproject; subproject = (S_ISGITLINK(mode1) || S_ISGITLINK(mode2)); html("<div class='head'>"); html("diff --git a/"); html_txt(path1); html(" b/"); html_txt(path2); if (mode1 == 0) htmlf("<br/>new file mode %.6o", mode2); if (mode2 == 0) htmlf("<br/>deleted file mode %.6o", mode1); if (!subproject) { abbrev1 = xstrdup(find_unique_abbrev(sha1, DEFAULT_ABBREV)); abbrev2 = xstrdup(find_unique_abbrev(sha2, DEFAULT_ABBREV)); htmlf("<br/>index %s..%s", abbrev1, abbrev2); free(abbrev1); free(abbrev2); if (mode1 != 0 && mode2 != 0) { htmlf(" %.6o", mode1); if (mode2 != mode1) htmlf("..%.6o", mode2); } if (is_null_sha1(sha1)) { path1 = "dev/null"; html("<br/>--- /"); } else html("<br/>--- a/"); if (mode1 != 0) cgit_tree_link(path1, NULL, NULL, ctx.qry.head, sha1_to_hex(old_rev_sha1), path1); else html_txt(path1); if (is_null_sha1(sha2)) { path2 = "dev/null"; html("<br/>+++ /"); } else html("<br/>+++ b/"); if (mode2 != 0) cgit_tree_link(path2, NULL, NULL, ctx.qry.head, sha1_to_hex(new_rev_sha1), path2); else html_txt(path2); } html("</div>"); } static void filepair_cb(struct diff_filepair *pair) { unsigned long old_size = 0; unsigned long new_size = 0; int binary = 0; linediff_fn print_line_fn = print_line; if (!show_filepair(pair)) return; current_filepair = pair; if (use_ssdiff) { cgit_ssdiff_header_begin(); print_line_fn = cgit_ssdiff_line_cb; } header(pair->one->sha1, pair->one->path, pair->one->mode, pair->two->sha1, pair->two->path, pair->two->mode); if (use_ssdiff) cgit_ssdiff_header_end(); if (S_ISGITLINK(pair->one->mode) || S_ISGITLINK(pair->two->mode)) { if (S_ISGITLINK(pair->one->mode)) print_line_fn(fmt("-Subproject %s", sha1_to_hex(pair->one->sha1)), 52); if (S_ISGITLINK(pair->two->mode)) print_line_fn(fmt("+Subproject %s", sha1_to_hex(pair->two->sha1)), 52); if (use_ssdiff) cgit_ssdiff_footer(); return; } if (cgit_diff_files(pair->one->sha1, pair->two->sha1, &old_size, &new_size, &binary, ctx.qry.context, ctx.qry.ignorews, print_line_fn)) cgit_print_error("Error running diff"); if (binary) { if (use_ssdiff) html("<tr><td colspan='4'>Binary files differ</td></tr>"); else html("Binary files differ"); } if (use_ssdiff) cgit_ssdiff_footer(); } void cgit_print_diff_ctrls(void) { int i, curr; html("<div class='cgit-panel'>"); html("<b>diff options</b>"); html("<form method='get' action='.'>"); cgit_add_hidden_formfields(1, 0, ctx.qry.page); html("<table>"); html("<tr><td colspan='2'/></tr>"); html("<tr>"); html("<td class='label'>context:</td>"); html("<td class='ctrl'>"); html("<select name='context' onchange='this.form.submit();'>"); curr = ctx.qry.context; if (!curr) curr = 3; for (i = 1; i <= 10; i++) html_intoption(i, fmt("%d", i), curr); for (i = 15; i <= 40; i += 5) html_intoption(i, fmt("%d", i), curr); html("</select>"); html("</td>"); html("</tr><tr>"); html("<td class='label'>space:</td>"); html("<td class='ctrl'>"); html("<select name='ignorews' onchange='this.form.submit();'>"); html_intoption(0, "include", ctx.qry.ignorews); html_intoption(1, "ignore", ctx.qry.ignorews); html("</select>"); html("</td>"); html("</tr><tr>"); html("<td class='label'>mode:</td>"); html("<td class='ctrl'>"); html("<select name='dt' onchange='this.form.submit();'>"); curr = ctx.qry.has_difftype ? ctx.qry.difftype : ctx.cfg.difftype; html_intoption(0, "unified", curr); html_intoption(1, "ssdiff", curr); html_intoption(2, "stat only", curr); html("</select></td></tr>"); html("<tr><td/><td class='ctrl'>"); html("<noscript><input type='submit' value='reload'/></noscript>"); html("</td></tr></table>"); html("</form>"); html("</div>"); } void cgit_print_diff(const char *new_rev, const char *old_rev, const char *prefix, int show_ctrls, int raw) { struct commit *commit, *commit2; const unsigned char *old_tree_sha1, *new_tree_sha1; diff_type difftype; /* * If "follow" is set then the diff machinery needs to examine the * entire commit to detect renames so we must limit the paths in our * own callbacks and not pass the prefix to the diff machinery. */ if (ctx.qry.follow && ctx.cfg.enable_follow_links) { current_prefix = prefix; prefix = ""; } else { current_prefix = NULL; } if (!new_rev) new_rev = ctx.qry.head; if (get_sha1(new_rev, new_rev_sha1)) { cgit_print_error_page(404, "Not found", "Bad object name: %s", new_rev); return; } commit = lookup_commit_reference(new_rev_sha1); if (!commit || parse_commit(commit)) { cgit_print_error_page(404, "Not found", "Bad commit: %s", sha1_to_hex(new_rev_sha1)); return; } new_tree_sha1 = commit->tree->object.sha1; if (old_rev) { if (get_sha1(old_rev, old_rev_sha1)) { cgit_print_error_page(404, "Not found", "Bad object name: %s", old_rev); return; } } else if (commit->parents && commit->parents->item) { hashcpy(old_rev_sha1, commit->parents->item->object.sha1); } else { hashclr(old_rev_sha1); } if (!is_null_sha1(old_rev_sha1)) { commit2 = lookup_commit_reference(old_rev_sha1); if (!commit2 || parse_commit(commit2)) { cgit_print_error_page(404, "Not found", "Bad commit: %s", sha1_to_hex(old_rev_sha1)); return; } old_tree_sha1 = commit2->tree->object.sha1; } else { old_tree_sha1 = NULL; } if (raw) { struct diff_options diffopt; diff_setup(&diffopt); diffopt.output_format = DIFF_FORMAT_PATCH; DIFF_OPT_SET(&diffopt, RECURSIVE); diff_setup_done(&diffopt); ctx.page.mimetype = "text/plain"; cgit_print_http_headers(); if (old_tree_sha1) { diff_tree_sha1(old_tree_sha1, new_tree_sha1, "", &diffopt); } else { diff_root_tree_sha1(new_tree_sha1, "", &diffopt); } diffcore_std(&diffopt); diff_flush(&diffopt); return; } difftype = ctx.qry.has_difftype ? ctx.qry.difftype : ctx.cfg.difftype; use_ssdiff = difftype == DIFF_SSDIFF; if (show_ctrls) { cgit_print_layout_start(); cgit_print_diff_ctrls(); } /* * Clicking on a link to a file in the diff stat should show a diff * of the file, showing the diff stat limited to a single file is * pretty useless. All links from this point on will be to * individual files, so we simply reset the difftype in the query * here to avoid propagating DIFF_STATONLY to the individual files. */ if (difftype == DIFF_STATONLY) ctx.qry.difftype = ctx.cfg.difftype; cgit_print_diffstat(old_rev_sha1, new_rev_sha1, prefix); if (difftype == DIFF_STATONLY) return; if (use_ssdiff) { html("<table summary='ssdiff' class='ssdiff'>"); } else { html("<table summary='diff' class='diff'>"); html("<tr><td>"); } cgit_diff_tree(old_rev_sha1, new_rev_sha1, filepair_cb, prefix, ctx.qry.ignorews); if (!use_ssdiff) html("</td></tr>"); html("</table>"); if (show_ctrls) cgit_print_layout_end(); }