cgit/ui-repolist.c
John Keeping 30304d8156 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 16:57:46 +02:00

355 lines
8.1 KiB
C

/* ui-repolist.c: functions for generating the repolist page
*
* 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-repolist.h"
#include "html.h"
#include "ui-shared.h"
#include <strings.h>
static time_t read_agefile(char *path)
{
time_t result;
size_t size;
char *buf;
struct strbuf date_buf = STRBUF_INIT;
if (readfile(path, &buf, &size))
return -1;
if (parse_date(buf, &date_buf) == 0)
result = strtoul(date_buf.buf, NULL, 10);
else
result = 0;
free(buf);
strbuf_release(&date_buf);
return result;
}
static int get_repo_modtime(const struct cgit_repo *repo, time_t *mtime)
{
struct strbuf path = STRBUF_INIT;
struct stat s;
struct cgit_repo *r = (struct cgit_repo *)repo;
if (repo->mtime != -1) {
*mtime = repo->mtime;
return 1;
}
strbuf_addf(&path, "%s/%s", repo->path, ctx.cfg.agefile);
if (stat(path.buf, &s) == 0) {
*mtime = read_agefile(path.buf);
if (*mtime) {
r->mtime = *mtime;
goto end;
}
}
strbuf_reset(&path);
strbuf_addf(&path, "%s/refs/heads/%s", repo->path,
repo->defbranch ? repo->defbranch : "master");
if (stat(path.buf, &s) == 0) {
*mtime = s.st_mtime;
r->mtime = *mtime;
goto end;
}
strbuf_reset(&path);
strbuf_addf(&path, "%s/%s", repo->path, "packed-refs");
if (stat(path.buf, &s) == 0) {
*mtime = s.st_mtime;
r->mtime = *mtime;
goto end;
}
*mtime = 0;
r->mtime = *mtime;
end:
strbuf_release(&path);
return (r->mtime != 0);
}
static void print_modtime(struct cgit_repo *repo)
{
time_t t;
if (get_repo_modtime(repo, &t))
cgit_print_age(t, -1, NULL);
}
static int is_match(struct cgit_repo *repo)
{
if (!ctx.qry.search)
return 1;
if (repo->url && strcasestr(repo->url, ctx.qry.search))
return 1;
if (repo->name && strcasestr(repo->name, ctx.qry.search))
return 1;
if (repo->desc && strcasestr(repo->desc, ctx.qry.search))
return 1;
if (repo->owner && strcasestr(repo->owner, ctx.qry.search))
return 1;
return 0;
}
static int is_in_url(struct cgit_repo *repo)
{
if (!ctx.qry.url)
return 1;
if (repo->url && starts_with(repo->url, ctx.qry.url))
return 1;
return 0;
}
static void print_sort_header(const char *title, const char *sort)
{
html("<th class='left'><a href='");
html_attr(cgit_currenturl());
htmlf("?s=%s", sort);
if (ctx.qry.search) {
html("&amp;q=");
html_url_arg(ctx.qry.search);
}
htmlf("'>%s</a></th>", title);
}
static void print_header(void)
{
html("<tr class='nohover'>");
print_sort_header("Name", "name");
print_sort_header("Description", "desc");
if (ctx.cfg.enable_index_owner)
print_sort_header("Owner", "owner");
print_sort_header("Idle", "idle");
if (ctx.cfg.enable_index_links)
html("<th class='left'>Links</th>");
html("</tr>\n");
}
static void print_pager(int items, int pagelen, char *search, char *sort)
{
int i, ofs;
char *class = NULL;
html("<ul class='pager'>");
for (i = 0, ofs = 0; ofs < items; i++, ofs = i * pagelen) {
class = (ctx.qry.ofs == ofs) ? "current" : NULL;
html("<li>");
cgit_index_link(fmt("[%d]", i + 1), fmt("Page %d", i + 1),
class, search, sort, ofs, 0);
html("</li>");
}
html("</ul>");
}
static int cmp(const char *s1, const char *s2)
{
if (s1 && s2) {
if (ctx.cfg.case_sensitive_sort)
return strcmp(s1, s2);
else
return strcasecmp(s1, s2);
}
if (s1 && !s2)
return -1;
if (s2 && !s1)
return 1;
return 0;
}
static int sort_section(const void *a, const void *b)
{
const struct cgit_repo *r1 = a;
const struct cgit_repo *r2 = b;
int result;
time_t t;
result = cmp(r1->section, r2->section);
if (!result) {
if (!strcmp(ctx.cfg.repository_sort, "age")) {
// get_repo_modtime caches the value in r->mtime, so we don't
// have to worry about inefficiencies here.
if (get_repo_modtime(r1, &t) && get_repo_modtime(r2, &t))
result = r2->mtime - r1->mtime;
}
if (!result)
result = cmp(r1->name, r2->name);
}
return result;
}
static int sort_name(const void *a, const void *b)
{
const struct cgit_repo *r1 = a;
const struct cgit_repo *r2 = b;
return cmp(r1->name, r2->name);
}
static int sort_desc(const void *a, const void *b)
{
const struct cgit_repo *r1 = a;
const struct cgit_repo *r2 = b;
return cmp(r1->desc, r2->desc);
}
static int sort_owner(const void *a, const void *b)
{
const struct cgit_repo *r1 = a;
const struct cgit_repo *r2 = b;
return cmp(r1->owner, r2->owner);
}
static int sort_idle(const void *a, const void *b)
{
const struct cgit_repo *r1 = a;
const struct cgit_repo *r2 = b;
time_t t1, t2;
t1 = t2 = 0;
get_repo_modtime(r1, &t1);
get_repo_modtime(r2, &t2);
return t2 - t1;
}
struct sortcolumn {
const char *name;
int (*fn)(const void *a, const void *b);
};
static const struct sortcolumn sortcolumn[] = {
{"section", sort_section},
{"name", sort_name},
{"desc", sort_desc},
{"owner", sort_owner},
{"idle", sort_idle},
{NULL, NULL}
};
static int sort_repolist(char *field)
{
const struct sortcolumn *column;
for (column = &sortcolumn[0]; column->name; column++) {
if (strcmp(field, column->name))
continue;
qsort(cgit_repolist.repos, cgit_repolist.count,
sizeof(struct cgit_repo), column->fn);
return 1;
}
return 0;
}
void cgit_print_repolist(void)
{
int i, columns = 3, hits = 0, header = 0;
char *last_section = NULL;
char *section;
int sorted = 0;
if (ctx.cfg.enable_index_links)
++columns;
if (ctx.cfg.enable_index_owner)
++columns;
ctx.page.title = ctx.cfg.root_title;
cgit_print_http_headers();
cgit_print_docstart();
cgit_print_pageheader();
if (ctx.cfg.index_header)
html_include(ctx.cfg.index_header);
if (ctx.qry.sort)
sorted = sort_repolist(ctx.qry.sort);
else if (ctx.cfg.section_sort)
sort_repolist("section");
html("<table summary='repository list' class='list nowrap'>");
for (i = 0; i < cgit_repolist.count; i++) {
ctx.repo = &cgit_repolist.repos[i];
if (ctx.repo->hide || ctx.repo->ignore)
continue;
if (!(is_match(ctx.repo) && is_in_url(ctx.repo)))
continue;
hits++;
if (hits <= ctx.qry.ofs)
continue;
if (hits > ctx.qry.ofs + ctx.cfg.max_repo_count)
continue;
if (!header++)
print_header();
section = ctx.repo->section;
if (section && !strcmp(section, ""))
section = NULL;
if (!sorted &&
((last_section == NULL && section != NULL) ||
(last_section != NULL && section == NULL) ||
(last_section != NULL && section != NULL &&
strcmp(section, last_section)))) {
htmlf("<tr class='nohover'><td colspan='%d' class='reposection'>",
columns);
html_txt(section);
html("</td></tr>");
last_section = section;
}
htmlf("<tr><td class='%s'>",
!sorted && section ? "sublevel-repo" : "toplevel-repo");
cgit_summary_link(ctx.repo->name, ctx.repo->name, NULL, NULL);
html("</td><td>");
html_link_open(cgit_repourl(ctx.repo->url), NULL, NULL);
html_ntxt(ctx.cfg.max_repodesc_len, ctx.repo->desc);
html_link_close();
html("</td><td>");
if (ctx.cfg.enable_index_owner) {
if (ctx.repo->owner_filter) {
cgit_open_filter(ctx.repo->owner_filter);
html_txt(ctx.repo->owner);
cgit_close_filter(ctx.repo->owner_filter);
} else {
html("<a href='");
html_attr(cgit_currenturl());
html("?q=");
html_url_arg(ctx.repo->owner);
html("'>");
html_txt(ctx.repo->owner);
html("</a>");
}
html("</td><td>");
}
print_modtime(ctx.repo);
html("</td>");
if (ctx.cfg.enable_index_links) {
html("<td>");
cgit_summary_link("summary", NULL, "button", NULL);
cgit_log_link("log", NULL, "button", NULL, NULL, NULL,
0, NULL, NULL, ctx.qry.showmsg, 0);
cgit_tree_link("tree", NULL, "button", NULL, NULL, NULL);
html("</td>");
}
html("</tr>\n");
}
html("</table>");
if (!hits)
cgit_print_error("No repositories found");
else if (hits > ctx.cfg.max_repo_count)
print_pager(hits, ctx.cfg.max_repo_count, ctx.qry.search, ctx.qry.sort);
cgit_print_docend();
}
void cgit_print_site_readme(void)
{
if (!ctx.cfg.root_readme)
return;
cgit_open_filter(ctx.cfg.about_filter, ctx.cfg.root_readme);
html_include(ctx.cfg.root_readme);
cgit_close_filter(ctx.cfg.about_filter);
}