/* cgit.c: cgi for the git scm
 *
 * Copyright (C) 2006 Lars Hjemli
 * Copyright (C) 2010, 2012 Jason A. Donenfeld <Jason@zx2c4.com>
 *
 * Licensed under GNU General Public License v2
 *   (see COPYING for full license text)
 */

#include "cgit.h"
#include "cache.h"
#include "cmd.h"
#include "configfile.h"
#include "html.h"
#include "ui-shared.h"
#include "ui-stats.h"
#include "scan-tree.h"

const char *cgit_version = CGIT_VERSION;

void add_mimetype(const char *name, const char *value)
{
	struct string_list_item *item;

	item = string_list_insert(&ctx.cfg.mimetypes, xstrdup(name));
	item->util = xstrdup(value);
}

struct cgit_filter *new_filter(const char *cmd, filter_type filtertype)
{
	struct cgit_filter *f;
	int args_size = 0;
	int extra_args;

	if (!cmd || !cmd[0])
		return NULL;

	switch (filtertype) {
		case SOURCE:
			extra_args = 1;
			break;

		case ABOUT:
		case COMMIT:
		default:
			extra_args = 0;
			break;
	}

	f = xmalloc(sizeof(struct cgit_filter));
	f->cmd = xstrdup(cmd);
	args_size = (2 + extra_args) * sizeof(char *);
	f->argv = xmalloc(args_size);
	memset(f->argv, 0, args_size);
	f->argv[0] = f->cmd;
	return f;
}

static void process_cached_repolist(const char *path);

void repo_config(struct cgit_repo *repo, const char *name, const char *value)
{
	struct string_list_item *item;

	if (!strcmp(name, "name"))
		repo->name = xstrdup(value);
	else if (!strcmp(name, "clone-url"))
		repo->clone_url = xstrdup(value);
	else if (!strcmp(name, "desc"))
		repo->desc = xstrdup(value);
	else if (!strcmp(name, "owner"))
		repo->owner = xstrdup(value);
	else if (!strcmp(name, "defbranch"))
		repo->defbranch = xstrdup(value);
	else if (!strcmp(name, "snapshots"))
		repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
	else if (!strcmp(name, "enable-commit-graph"))
		repo->enable_commit_graph = ctx.cfg.enable_commit_graph * atoi(value);
	else if (!strcmp(name, "enable-log-filecount"))
		repo->enable_log_filecount = ctx.cfg.enable_log_filecount * atoi(value);
	else if (!strcmp(name, "enable-log-linecount"))
		repo->enable_log_linecount = ctx.cfg.enable_log_linecount * atoi(value);
	else if (!strcmp(name, "enable-remote-branches"))
		repo->enable_remote_branches = atoi(value);
	else if (!strcmp(name, "enable-subject-links"))
		repo->enable_subject_links = atoi(value);
	else if (!strcmp(name, "max-stats"))
		repo->max_stats = cgit_find_stats_period(value, NULL);
	else if (!strcmp(name, "module-link"))
		repo->module_link= xstrdup(value);
	else if (!prefixcmp(name, "module-link.")) {
		item = string_list_append(&repo->submodules, name + 12);
		item->util = xstrdup(value);
	} else if (!strcmp(name, "section"))
		repo->section = xstrdup(value);
	else if (!strcmp(name, "readme") && value != NULL)
		repo->readme = xstrdup(value);
	else if (!strcmp(name, "logo") && value != NULL)
		repo->logo = xstrdup(value);
	else if (!strcmp(name, "logo-link") && value != NULL)
		repo->logo_link = xstrdup(value);
	else if (ctx.cfg.enable_filter_overrides) {
		if (!strcmp(name, "about-filter"))
			repo->about_filter = new_filter(value, ABOUT);
		else if (!strcmp(name, "commit-filter"))
			repo->commit_filter = new_filter(value, COMMIT);
		else if (!strcmp(name, "source-filter"))
			repo->source_filter = new_filter(value, SOURCE);
	}
}

void config_cb(const char *name, const char *value)
{
	if (!strcmp(name, "section") || !strcmp(name, "repo.group"))
		ctx.cfg.section = xstrdup(value);
	else if (!strcmp(name, "repo.url"))
		ctx.repo = cgit_add_repo(value);
	else if (ctx.repo && !strcmp(name, "repo.path"))
		ctx.repo->path = trim_end(value, '/');
	else if (ctx.repo && !prefixcmp(name, "repo."))
		repo_config(ctx.repo, name + 5, value);
	else if (!strcmp(name, "readme"))
		ctx.cfg.readme = xstrdup(value);
	else if (!strcmp(name, "root-title"))
		ctx.cfg.root_title = xstrdup(value);
	else if (!strcmp(name, "root-desc"))
		ctx.cfg.root_desc = xstrdup(value);
	else if (!strcmp(name, "root-readme"))
		ctx.cfg.root_readme = xstrdup(value);
	else if (!strcmp(name, "css"))
		ctx.cfg.css = xstrdup(value);
	else if (!strcmp(name, "favicon"))
		ctx.cfg.favicon = xstrdup(value);
	else if (!strcmp(name, "footer"))
		ctx.cfg.footer = xstrdup(value);
	else if (!strcmp(name, "head-include"))
		ctx.cfg.head_include = xstrdup(value);
	else if (!strcmp(name, "header"))
		ctx.cfg.header = xstrdup(value);
	else if (!strcmp(name, "logo"))
		ctx.cfg.logo = xstrdup(value);
	else if (!strcmp(name, "index-header"))
		ctx.cfg.index_header = xstrdup(value);
	else if (!strcmp(name, "index-info"))
		ctx.cfg.index_info = xstrdup(value);
	else if (!strcmp(name, "logo-link"))
		ctx.cfg.logo_link = xstrdup(value);
	else if (!strcmp(name, "module-link"))
		ctx.cfg.module_link = xstrdup(value);
	else if (!strcmp(name, "strict-export"))
		ctx.cfg.strict_export = xstrdup(value);
	else if (!strcmp(name, "virtual-root")) {
		ctx.cfg.virtual_root = trim_end(value, '/');
		if (!ctx.cfg.virtual_root && (!strcmp(value, "/")))
			ctx.cfg.virtual_root = "";
	} else if (!strcmp(name, "nocache"))
		ctx.cfg.nocache = atoi(value);
	else if (!strcmp(name, "noplainemail"))
		ctx.cfg.noplainemail = atoi(value);
	else if (!strcmp(name, "noheader"))
		ctx.cfg.noheader = atoi(value);
	else if (!strcmp(name, "snapshots"))
		ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
	else if (!strcmp(name, "enable-filter-overrides"))
		ctx.cfg.enable_filter_overrides = atoi(value);
	else if (!strcmp(name, "enable-gitweb-desc"))
		ctx.cfg.enable_gitweb_desc = atoi(value);
	else if (!strcmp(name, "enable-gitweb-owner"))
		ctx.cfg.enable_gitweb_owner = atoi(value);
	else if (!strcmp(name, "enable-http-clone"))
		ctx.cfg.enable_http_clone = atoi(value);
	else if (!strcmp(name, "enable-index-links"))
		ctx.cfg.enable_index_links = atoi(value);
	else if (!strcmp(name, "enable-commit-graph"))
		ctx.cfg.enable_commit_graph = atoi(value);
	else if (!strcmp(name, "enable-log-filecount"))
		ctx.cfg.enable_log_filecount = atoi(value);
	else if (!strcmp(name, "enable-log-linecount"))
		ctx.cfg.enable_log_linecount = atoi(value);
	else if (!strcmp(name, "enable-remote-branches"))
		ctx.cfg.enable_remote_branches = atoi(value);
	else if (!strcmp(name, "enable-subject-links"))
		ctx.cfg.enable_subject_links = atoi(value);
	else if (!strcmp(name, "enable-tree-linenum<style>pre { line-height: 125%; }
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.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */</style><div class="highlight"><pre><span></span><span class="cm">/* ui-patch.c: generate patch view</span>
<span class="cm"> *</span>
<span class="cm"> * Copyright (C) 2007 Lars Hjemli</span>
<span class="cm"> *</span>
<span class="cm"> * Licensed under GNU General Public License v2</span>
<span class="cm"> *   (see COPYING for full license text)</span>
<span class="cm"> */</span>

<span class="cp">#include</span><span class="w"> </span><span class="cpf">&quot;cgit.h&quot;</span>
<span class="cp">#include</span><span class="w"> </span><span class="cpf">&quot;html.h&quot;</span>

<span class="k">static</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">print_line</span><span class="p">(</span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">line</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">len</span><span class="p">)</span>
<span class="p">{</span>
<span class="w">	</span><span class="kt">char</span><span class="w"> </span><span class="n">c</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">line</span><span class="p">[</span><span class="n">len</span><span class="mi">-1</span><span class="p">];</span>

<span class="w">	</span><span class="n">line</span><span class="p">[</span><span class="n">len</span><span class="mi">-1</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="sc">&#39;\0&#39;</span><span class="p">;</span>
<span class="w">	</span><span class="n">htmlf</span><span class="p">(</span><span class="s">&quot;%s</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">line</span><span class="p">);</span>
<span class="w">	</span><span class="n">line</span><span class="p">[</span><span class="n">len</span><span class="mi">-1</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">c</span><span class="p">;</span>
<span class="p">}</span>

<span class="k">static</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">header</span><span class="p">(</span><span class="kt">unsigned</span><span class="w"> </span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">sha1</span><span class="p">,</span><span class="w"> </span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">path1</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">mode1</span><span class="p">,</span>
<span class="w">		   </span><span class="kt">unsigned</span><span class="w"> </span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">sha2</span><span class="p">,</span><span class="w"> </span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">path2</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">mode2</span><span class="p">)</span>
<span class="p">{</span>
<span class="w">	</span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">abbrev1</span><span class="p">,</span><span class="w"> </span><span class="o">*</span><span class="n">abbrev2</span><span class="p">;</span>
<span class="w">	</span><span class="kt">int</span><span class="w"> </span><span class="n">subproject</span><span class="p">;</span>

<span class="w">	</span><span class="n">subproject</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="n">S_ISGITLINK</span><span class="p">(</span><span class="n">mode1</span><span class="p">)</span><span class="w"> </span><span class="o">||</span><span class="w"> </span><span class="n">S_ISGITLINK</span><span class="p">(</span><span class="n">mode2</span><span class="p">));</span>
<span class="w">	</span><span class="n">htmlf</span><span class="p">(</span><span class="s">&quot;diff --git a/%s b/%s</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">path1</span><span class="p">,</span><span class="w"> </span><span class="n">path2</span><span class="p">);</span>

<span class="w">	</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">is_null_sha1</span><span class="p">(</span><span class="n">sha1</span><span class="p">))</span>
<span class="w">		</span><span class="n">path1</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">&quot;dev/null&quot;</span><span class="p">;</span>
<span class="w">	</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">is_null_sha1</span><span class="p">(</span><span class="n">sha2</span><span class="p">))</span>
<span class="w">		</span><span class="n">path2</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">&quot;dev/null&quot;</span><span class="p">;</span>

<span class="w">	</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">mode1</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">0</span><span class="p">)</span>
<span class="w">		</span><span class="n">htmlf</span><span class="p">(</span><span class="s">&quot;new file mode %.6o</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">mode2</span><span class="p">);</span>

<span class="w">	</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">mode2</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">0</span><span class="p">)</span>
<span class="w">		</span><span class="n">htmlf</span><span class="p">(</span><span class="s">&quot;deleted file mode %.6o</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">mode1</span><span class="p">);</span>

<span class="w">	</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="o">!</span><span class="n">subproject</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w">		</span><span class="n">abbrev1</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">xstrdup</span><span class="p">(</span><span class="n">find_unique_abbrev</span><span class="p">(</span><span class="n">sha1</span><span class="p">,</span><span class="w"> </span><span class="n">DEFAULT_ABBREV</span><span class="p">));</span>
<span class="w">		</span><span class="n">abbrev2</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">xstrdup</span><span class="p">(</span><span class="n">find_unique_abbrev</span><span class="p">(</span><span class="n">sha2</span><span class="p">,</span><span class="w"> </span><span class="n">DEFAULT_ABBREV</span><span class="p">));</span>
<span class="w">		</span><span class="n">htmlf</span><span class="p">(</span><span class="s">&quot;index %s..%s&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">abbrev1</span><span class="p">,</span><span class="w"> </span><span class="n">abbrev2</span><span class="p">);</span>
<span class="w">		</span><span class="n">free</span><span class="p">(</span><span class="n">abbrev1</span><span class="p">);</span>
<span class="w">		</span><span class="n">free</span><span class="p">(</span><span class="n">abbrev2</span><span class="p">);</span>
<span class="w">		</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">mode1</span><span class="w"> </span><span class="o">!=</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="o">&amp;&amp;</span><span class="w"> </span><span class="n">mode2</span><span class="w"> </span><span class="o">!=</span><span class="w"> </span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w">			</span><span class="n">htmlf</span><span class="p">(</span><span class="s">&quot; %.6o&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">mode1</span><span class="p">);</span>
<span class="w">			</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">mode2</span><span class="w"> </span><span class="o">!=</span><span class="w"> </span><span class="n">mode1</span><span class="p">)</span>
<span class="w">				</span><span class="n">htmlf</span><span class="p">(</span><span class="s">&quot;..%.6o&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">mode2</span><span class="p">);</span>
<span class="w">		</span><span class="p">}</span>
<span class="w">		</span><span class="n">htmlf</span><span class="p">(</span><span class="s">&quot;</span><span class="se">\n</span><span class="s">--- a/%s</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">path1</span><span class="p">);</span>
<span class="w">		</span><span class="n">htmlf</span><span class="p">(</span><span class="s">&quot;+++ b/%s</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">path2</span><span class="p">);</span>
<span class="w">	</span><span class="p">}</span>
<span class="p">}</span>

<span class="k">static</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">filepair_cb</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">diff_filepair</span><span class="w"> </span><span class="o">*</span><span class="n">pair</span><span class="p">)</span>
<span class="p">{</span>
<span class="w">	</span><span class="n">header</span><span class="p">(</span><span class="n">pair</span><span class="o">-&gt;</span><span class="n">one</span><span class="o">-&gt;</span><span class="n">sha1</span><span class="p">,</span><span class="w"> </span><span class="n">pair</span><span class="o">-&gt;</span><span class="n">one</span><span class="o">-&gt;</span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="n">pair</span><span class="o">-&gt;</span><span class="n">one</span><span class="o">-&gt;</span><span class="n">mode</span><span class="p">,</span>
<span class="w">	       </span><span class="n">pair</span><span class="o">-&gt;</span><span class="n">two</span><span class="o">-&gt;</span><span class="n">sha1</span><span class="p">,</span><span class="w"> </span><span class="n">pair</span><span class="o">-&gt;</span><span class="n">two</span><span class="o">-&gt;</span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="n">pair</span><span class="o">-&gt;</span><span class="n">two</span><span class="o">-&gt;</span><span class="n">mode</span><span class="p">);</span>
<span class="w">	</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">S_ISGITLINK</span><span class="p">(</span><span class="n">pair</span><span class="o">-&gt;</span><span class="n">one</span><span class="o">-&gt;</span><span class="n">mode</span><span class="p">)</span><span class="w"> </span><span class="o">||</span><span class="w"> </span><span class="n">S_ISGITLINK</span><span class="p">(</span><span class="n">pair</span><span class="o">-&gt;</span><span class="n">two</span><span class="o">-&gt;</span><span class="n">mode</span><span class="p">))</span><span class="w"> </span><span class="p">{</span>
<span class="w">		</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">S_ISGITLINK</span><span class="p">(</span><span class="n">pair</span><span class="o">-&gt;</span><span class="n">one</span><span class="o">-&gt;</span><span class="n">mode</span><span class="p">))</span>
<span class="w">			</span><span class="n">print_line</span><span class="p">(</span><span class="n">fmt</span><span class="p">(</span><span class="s">&quot;-Subproject %s&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">sha1_to_hex</span><span class="p">(</span><span class="n">pair</span><span class="o">-&gt;</span><span class="n">one</span><span class="o">-&gt;</span><span class="n">sha1</span><span class="p">)),</span><span class="w"> </span><span class="mi">52</span><span class="p">);</span>
<span class="w">		</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">S_ISGITLINK</span><span class="p">(</span><span class="n">pair</span><span class="o">-&gt;</span><span class="n">two</span><span class="o">-&gt;</span><span class="n">mode</span><span class="p">))</span>
<span class="w">			</span><span class="n">print_line</span><span class="p">(</span><span class="n">fmt</span><span class="p">(</span><span class="s">&quot;+Subproject %s&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">sha1_to_hex</span><span class="p">(</span><span class="n">pair</span><span class="o">-&gt;</span><span class="n">two</span><span class="o">-&gt;</span><span class="n">sha1</span><span class="p">)),</span><span class="w"> </span><span class="mi">52</span><span class="p">);</span>
<span class="w">		</span><span class="k">return</span><span class="p">;</span>
<span class="w">	</span><span class="p">}</span>
<span class="w">	</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">cgit_diff_files</span><span class="p">(</span><span class="n">pair</span><span class="o">-&gt;</span><span class="n">one</span><span class="o">-&gt;</span><span class="n">sha1</span><span class="p">,</span><span class="w"> </span><span class="n">pair</span><span class="o">-&gt;</span><span class="n">two