cgit/ui-tree.c

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C
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/* ui-tree.c: functions for tree output
*
* 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-tree.h"
#include "html.h"
#include "ui-shared.h"
struct walk_tree_context {
char *curr_rev;
char *match_path;
int state;
};
static void print_text_buffer(const char *name, char *buf, unsigned long size)
{
unsigned long lineno, idx;
const char *numberfmt = "<a id='n%1$d' href='#n%1$d'>%1$d</a>\n";
html("<table summary='blob content' class='blob'>\n");
if (ctx.cfg.enable_tree_linenumbers) {
html("<tr><td class='linenumbers'><pre>");
idx = 0;
lineno = 0;
if (size) {
htmlf(numberfmt, ++lineno);
while (idx < size - 1) { // skip absolute last newline
if (buf[idx] == '\n')
htmlf(numberfmt, ++lineno);
idx++;
}
}
html("</pre></td>\n");
}
else {
html("<tr>\n");
}
if (ctx.repo->source_filter) {
char *filter_arg = xstrdup(name);
html("<td class='lines'><pre><code>");
cgit_open_filter(ctx.repo->source_filter, filter_arg);
html_raw(buf, size);
cgit_close_filter(ctx.repo->source_filter);
free(filter_arg);
html("</code></pre></td></tr></table>\n");
return;
}
html("<td class='lines'><pre><code>");
html_txt(buf);
html("</code></pre></td></tr></table>\n");
}
#define ROWLEN 32
static void print_binary_buffer(char *buf, unsigned long size)
{
unsigned long ofs, idx;
static char ascii[ROWLEN + 1];
html("<table summary='blob content' class='bin-blob'>\n");
html("<tr><th>ofs</th><th>hex dump</th><th>ascii</th></tr>");
for (ofs = 0; ofs < size; ofs += ROWLEN, buf += ROWLEN) {
htmlf("<tr><td class='right'>%04lx</td><td class='hex'>", ofs);
for (idx = 0; idx < ROWLEN && ofs + idx < size; idx++)
htmlf("%*s%02x",
idx == 16 ? 4 : 1, "",
buf[idx] & 0xff);
html(" </td><td class='hex'>");
for (idx = 0; idx < ROWLEN && ofs + idx < size; idx++)
ascii[idx] = isgraph(buf[idx]) ? buf[idx] : '.';
ascii[idx] = '\0';
html_txt(ascii);
html("</td></tr>\n");
}
html("</table>\n");
}
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static void set_title_from_path(const char *path)
{
size_t path_len, path_index, path_last_end;
char *new_title;
if (!path)
return;
path_len = strlen(path);
new_title = xmalloc(path_len + 3 + strlen(ctx.page.title) + 1);
new_title[0] = '\0';
for (path_index = path_len, path_last_end = path_len; path_index-- > 0;) {
if (path[path_index] == '/') {
if (path_index == path_len - 1) {
path_last_end = path_index - 1;
continue;
}
strncat(new_title, &path[path_index + 1], path_last_end - path_index - 1);
strcat(new_title, "\\");
path_last_end = path_index;
}
}
if (path_last_end)
strncat(new_title, path, path_last_end);
strcat(new_title, " - ");
strcat(new_title, ctx.page.title);
ctx.page.title = new_title;
}
static void print_object(const unsigned char *sha1, char *path, const char *basename, const char *rev)
{
enum object_type type;
char *buf;
unsigned long size;
type = sha1_object_info(sha1, &size);
if (type == OBJ_BAD) {
cgit_print_error_page(404, "Not found",
"Bad object name: %s", sha1_to_hex(sha1));
return;
}
buf = read_sha1_file(sha1, &type, &size);
if (!buf) {
cgit_print_error_page(500, "Internal server error",
"Error reading object %s", sha1_to_hex(sha1));
return;
}
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set_title_from_path(path);
cgit_print_layout_start();
htmlf("blob: %s (", sha1_to_hex(sha1));
cgit_plain_link("plain", NULL, NULL, ctx.qry.head,
rev, path);
html(")\n");
if (ctx.cfg.max_blob_size && size / 1024 > ctx.cfg.max_blob_size) {
htmlf("<div class='error'>blob size (%ldKB) exceeds display size limit (%dKB).</div>",
size / 1024, ctx.cfg.max_blob_size);
return;
}
if (buffer_is_binary(buf, size))
print_binary_buffer(buf, size);
else
print_text_buffer(basename, buf, size);
}
static int ls_item(const unsigned char *sha1, struct strbuf *base,
const char *pathname, unsigned mode, int stage, void *cbdata)
{
struct walk_tree_context *walk_tree_ctx = cbdata;
char *name;
struct strbuf fullpath = STRBUF_INIT;
struct strbuf class = STRBUF_INIT;
enum object_type type;
unsigned long size = 0;
name = xstrdup(pathname);
strbuf_addf(&fullpath, "%s%s%s", ctx.qry.path ? ctx.qry.path : "",
ctx.qry.path ? "/" : "", name);
if (!S_ISGITLINK(mode)) {
type = sha1_object_info(sha1, &size);
if (type == OBJ_BAD) {
htmlf("<tr><td colspan='3'>Bad object: %s %s</td></tr>",
name,
sha1_to_hex(sha1));
free(name);
return 0;
}
}
html("<tr><td class='ls-mode'>");
cgit_print_filemode(mode);
html("</td><td>");
if (S_ISGITLINK(mode)) {
cgit_submodule_link("ls-mod", fullpath.buf, sha1_to_hex(sha1));
} else if (S_ISDIR(mode)) {
cgit_tree_link(name, NULL, "ls-dir", ctx.qry.head,
walk_tree_ctx->curr_rev, fullpath.buf);
} else {
char *ext = strrchr(name, '.');
strbuf_addstr(&class, "ls-blob");
if (ext)
strbuf_addf(&class, " %s", ext + 1);
cgit_tree_link(name, NULL, class.buf, ctx.qry.head,
walk_tree_ctx->curr_rev, fullpath.buf);
}
htmlf("</td><td class='ls-size'>%li</td>", size);
html("<td>");
cgit_log_link("log", NULL, "button", ctx.qry.head,
walk_tree_ctx->curr_rev, fullpath.buf, 0, NULL, NULL,
log: allow users to follow a file Teach the "log" UI to behave in the same way as "git log --follow", when given a suitable instruction by the user. The default behaviour remains to show the log without following renames, but the follow behaviour can be activated by following a link in the page header. Follow is not the default because outputting merges in follow mode is tricky ("git log --follow" will not show merges). We also disable the graph in follow mode because the commit graph is not simplified so we end up with frequent gaps in the graph and many lines that do not connect with any commits we're actually showing. We also teach the "diff" and "commit" UIs to respect the follow flag on URLs, causing the single-file version of these UIs to detect renames. This feature is needed only for commits that rename the path we're interested in. For commits before the file has been renamed (i.e. that appear later in the log list) we change the file path in the links from the log to point to the old name; this means that links to commits always limit by the path known to that commit. If we didn't do this we would need to walk down the log diff'ing every commit whenever we want to show a commit. The drawback is that the "Log" link in the top bar of such a page links to the log limited by the old name, so it will only show pre-rename commits. I consider this a reasonable trade-off since the "Back" button still works and the log matches the path displayed in the top bar. Since following renames requires running diff on every commit we consider, I've added a knob to the configuration file to globally enable/disable this feature. Note that we may consider a large number of commits the revision walking machinery no longer performs any path limitation so we have to examine every commit until we find a page full of commits that affect the target path or something related to it. Suggested-by: René Neumann <necoro@necoro.eu> Signed-off-by: John Keeping <john@keeping.me.uk>
2015-08-12 14:55:28 +00:00
ctx.qry.showmsg, 0);
if (ctx.repo->max_stats)
cgit_stats_link("stats", NULL, "button", ctx.qry.head,
fullpath.buf);
if (!S_ISGITLINK(mode))
cgit_plain_link("plain", NULL, "button", ctx.qry.head,
walk_tree_ctx->curr_rev, fullpath.buf);
html("</td></tr>\n");
free(name);
strbuf_release(&fullpath);
strbuf_release(&class);
return 0;
}
static void ls_head(void)
{
cgit_print_layout_start();
html("<table summary='tree listing' class='list'>\n");
html("<tr class='nohover'>");
html("<th class='left'>Mode</th>");
html("<th class='left'>Name</th>");
html("<th class='right'>Size</th>");
html("<th/>");
html("</tr>\n");
}
static void ls_tail(void)
{
html("</table>\n");
cgit_print_layout_end();
}
static void ls_tree(const unsigned char *sha1, char *path, struct walk_tree_context *walk_tree_ctx)
{
struct tree *tree;
struct pathspec paths = {
.nr = 0
};
tree = parse_tree_indirect(sha1);
if (!tree) {
cgit_print_error_page(404, "Not found",
"Not a tree object: %s", sha1_to_hex(sha1));
return;
}
ls_head();
read_tree_recursive(tree, "", 0, 1, &paths, ls_item, walk_tree_ctx);
ls_tail();
}
static int walk_tree(const unsigned char *sha1, struct strbuf *base,
const char *pathname, unsigned mode, int stage, void *cbdata)
{
struct walk_tree_context *walk_tree_ctx = cbdata;
static char buffer[PATH_MAX];
if (walk_tree_ctx->state == 0) {
memcpy(buffer, base->buf, base->len);
strcpy(buffer + base->len, pathname);
if (strcmp(walk_tree_ctx->match_path, buffer))
return READ_TREE_RECURSIVE;
if (S_ISDIR(mode)) {
walk_tree_ctx->state = 1;
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set_title_from_path(buffer);
ls_head();
return READ_TREE_RECURSIVE;
} else {
walk_tree_ctx->state = 2;
print_object(sha1, buffer, pathname, walk_tree_ctx->curr_rev);
return 0;
}
}
ls_item(sha1, base, pathname, mode, stage, walk_tree_ctx);
return 0;
}
/*
* Show a tree or a blob
* rev: the commit pointing at the root tree object
* path: path to tree or blob
*/
void cgit_print_tree(const char *rev, char *path)
{
unsigned char sha1[20];
struct commit *commit;
struct pathspec_item path_items = {
.match = path,
.len = path ? strlen(path) : 0
};
struct pathspec paths = {
.nr = path ? 1 : 0,
.items = &path_items
};
struct walk_tree_context walk_tree_ctx = {
.match_path = path,
.state = 0
};
if (!rev)
rev = ctx.qry.head;
if (cgit_get_sha1(rev, sha1)) {
cgit_print_error_page(404, "Not found",
"Invalid revision name: %s", rev);
return;
}
commit = lookup_commit_reference(sha1);
if (!commit || parse_commit(commit)) {
cgit_print_error_page(404, "Not found",
"Invalid commit reference: %s", rev);
return;
}
walk_tree_ctx.curr_rev = xstrdup(rev);
if (path == NULL) {
ls_tree(commit->tree->object.oid.hash, NULL, &walk_tree_ctx);
goto cleanup;
}
read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
if (walk_tree_ctx.state == 1)
ls_tail();
else if (walk_tree_ctx.state == 2)
cgit_print_layout_end();
else
cgit_print_error_page(404, "Not found", "Path not found");
cleanup:
free(walk_tree_ctx.curr_rev);
}