28 files changed, 594 insertions, 183 deletions

diff --git a/.gitignore b/.gitignore
index 1e016e5..487728b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,5 +2,10 @@
 cgit
 cgit.conf
 VERSION
+cgitrc.5
+cgitrc.5.fo
+cgitrc.5.html
+cgitrc.5.pdf
+cgitrc.5.xml
 *.o
 *.d
diff --git a/Makefile b/Makefile
index 33c606d..1f9893a 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,7 @@ CGIT_DATA_PATH = $(CGIT_SCRIPT_PATH)
 CGIT_CONFIG = /etc/cgitrc
 CACHE_ROOT = /var/cache/cgit
 SHA1_HEADER = <openssl/sha.h>
-GIT_VER = 1.6.1.1
+GIT_VER = 1.6.3.4
 GIT_URL = http://www.kernel.org/pub/software/scm/git/git-$(GIT_VER).tar.bz2
 INSTALL = install
 
@@ -100,7 +100,8 @@ ifdef NEEDS_LIBICONV
 endif
 
 
-.PHONY: all libgit test install uninstall clean force-version get-git
+.PHONY: all libgit test install uninstall clean force-version get-git \
+        doc man-doc html-doc clean-doc
 
 all: cgit
 
@@ -149,8 +150,22 @@ uninstall:
         rm -f $(CGIT_DATA_PATH)/cgit.css
         rm -f $(CGIT_DATA_PATH)/cgit.png
 
-clean:
+doc: man-doc html-doc pdf-doc
+
+man-doc: cgitrc.5.txt
+        a2x -f manpage cgitrc.5.txt
+
+html-doc: cgitrc.5.txt
+        a2x -f xhtml --stylesheet=cgit-doc.css cgitrc.5.txt
+
+pdf-doc: cgitrc.5.txt
+        a2x -f pdf cgitrc.5.txt
+
+clean: clean-doc
         rm -f cgit VERSION *.o *.d
 
+clean-doc:
+        rm -f cgitrc.5 cgitrc.5.html cgitrc.5.pdf cgitrc.5.xml cgitrc.5.fo
+
 get-git:
         curl $(GIT_URL) | tar -xj && rm -rf git && mv git-$(GIT_VER) git
diff --git a/cgit-doc.css b/cgit-doc.css
new file mode 100644
index 0000000..5a399b6
--- /dev/null
+++ b/cgit-doc.css
@@ -0,0 +1,3 @@
+div.variablelist dt {
+        margin-top: 1em;
+}
diff --git a/cgit.c b/cgit.c
index 5301840..b0e1c44 100644
--- a/cgit.c
+++ b/cgit.c
@@ -17,6 +17,29 @@
 
 const char *cgit_version = CGIT_VERSION;
 
+void add_mimetype(const char *name, const char *value)
+{
+        struct string_list_item *item;
+
+        item = string_list_insert(xstrdup(name), &ctx.cfg.mimetypes);
+        item->util = xstrdup(value);
+}
+
+struct cgit_filter *new_filter(const char *cmd, int extra_args)
+{
+        struct cgit_filter *f;
+
+        if (!cmd || !cmd[0])
+                return NULL;
+
+        f = xmalloc(sizeof(struct cgit_filter));
+        f->cmd = xstrdup(cmd);
+        f->argv = xmalloc((2 + extra_args) * sizeof(char *));
+        f->argv[0] = f->cmd;
+        f->argv[1] = NULL;
+        return f;
+}
+
 void config_cb(const char *name, const char *value)
 {
         if (!strcmp(name, "root-title"))
@@ -31,6 +54,8 @@ void config_cb(const char *name, const char *value)
                 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"))
@@ -49,6 +74,10 @@ void config_cb(const char *name, const char *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-index-links"))
@@ -71,6 +100,12 @@ void config_cb(const char *name, const char *value)
                 ctx.cfg.cache_static_ttl = atoi(value);
         else if (!strcmp(name, "cache-dynamic-ttl"))
                 ctx.cfg.cache_dynamic_ttl = atoi(value);
+        else if (!strcmp(name, "about-filter"))
+                ctx.cfg.about_filter = new_filter(value, 0);
+        else if (!strcmp(name, "commit-filter"))
+                ctx.cfg.commit_filter = new_filter(value, 0);
+        else if (!strcmp(name, "embedded"))
+                ctx.cfg.embedded = atoi(value);
         else if (!strcmp(name, "max-message-length"))
                 ctx.cfg.max_msg_len = atoi(value);
         else if (!strcmp(name, "max-repodesc-length"))
@@ -79,6 +114,8 @@ void config_cb(const char *name, const char *value)
                 ctx.cfg.max_repo_count = atoi(value);
         else if (!strcmp(name, "max-commit-count"))
                 ctx.cfg.max_commit_count = atoi(value);
+        else if (!strcmp(name, "source-filter"))
+                ctx.cfg.source_filter = new_filter(value, 1);
         else if (!strcmp(name, "summary-log"))
                 ctx.cfg.summary_log = atoi(value);
         else if (!strcmp(name, "summary-branches"))
@@ -95,6 +132,8 @@ void config_cb(const char *name, const char *value)
                 ctx.cfg.clone_prefix = xstrdup(value);
         else if (!strcmp(name, "local-time"))
                 ctx.cfg.local_time = atoi(value);
+        else if (!prefixcmp(name, "mimetype."))
+                add_mimetype(name + 9, value);
         else if (!strcmp(name, "repo.group"))
                 ctx.cfg.repo_group = xstrdup(value);
         else if (!strcmp(name, "repo.url"))
@@ -121,6 +160,12 @@ void config_cb(const char *name, const char *value)
                 ctx.repo->max_stats = cgit_find_stats_period(value, NULL);
         else if (ctx.repo && !strcmp(name, "repo.module-link"))
                 ctx.repo->module_link= xstrdup(value);
+        else if (ctx.repo && !strcmp(name, "repo.about-filter"))
+                ctx.repo->about_filter = new_filter(value, 0);
+        else if (ctx.repo && !strcmp(name, "repo.commit-filter"))
+                ctx.repo->commit_filter = new_filter(value, 0);
+        else if (ctx.repo && !strcmp(name, "repo.source-filter"))
+                ctx.repo->source_filter = new_filter(value, 1);
         else if (ctx.repo && !strcmp(name, "repo.readme") && value != NULL) {
                 if (*value == '/')
                         ctx.repo->readme = xstrdup(value);
@@ -173,6 +218,11 @@ static void querystring_cb(const char *name, const char *value)
         }
 }
 
+char *xstrdupn(const char *str)
+{
+        return (str ? xstrdup(str) : NULL);
+}
+
 static void prepare_context(struct cgit_context *ctx)
 {
         memset(ctx, 0, sizeof(ctx));
@@ -186,7 +236,7 @@ static void prepare_context(struct cgit_context *ctx)
         ctx->cfg.cache_root_ttl = 5;
         ctx->cfg.cache_static_ttl = -1;
         ctx->cfg.css = "/cgit.css";
-        ctx->cfg.logo = "/git-logo.png";
+        ctx->cfg.logo = "/cgit.png";
         ctx->cfg.local_time = 0;
         ctx->cfg.max_repo_count = 50;
         ctx->cfg.max_commit_count = 50;
@@ -203,12 +253,30 @@ static void prepare_context(struct cgit_context *ctx)
         ctx->cfg.summary_branches = 10;
         ctx->cfg.summary_log = 10;
         ctx->cfg.summary_tags = 10;
+        ctx->env.cgit_config = xstrdupn(getenv("CGIT_CONFIG"));
+        ctx->env.http_host = xstrdupn(getenv("HTTP_HOST"));
+        ctx->env.https = xstrdupn(getenv("HTTPS"));
+        ctx->env.no_http = xstrdupn(getenv("NO_HTTP"));
+        ctx->env.path_info = xstrdupn(getenv("PATH_INFO"));
+        ctx->env.query_string = xstrdupn(getenv("QUERY_STRING"));
+        ctx->env.request_method = xstrdupn(getenv("REQUEST_METHOD"));
+        ctx->env.script_name = xstrdupn(getenv("SCRIPT_NAME"));
+        ctx->env.server_name = xstrdupn(getenv("SERVER_NAME"));
+        ctx->env.server_port = xstrdupn(getenv("SERVER_PORT"));
         ctx->page.mimetype = "text/html";
         ctx->page.charset = PAGE_ENCODING;
         ctx->page.filename = NULL;
         ctx->page.size = 0;
         ctx->page.modified = time(NULL);
         ctx->page.expires = ctx->page.modified;
+        ctx->page.etag = NULL;
+        memset(&ctx->cfg.mimetypes, 0, sizeof(struct string_list));
+        if (ctx->env.script_name)
+                ctx->cfg.script_name = ctx->env.script_name;
+        if (ctx->env.query_string)
+                ctx->qry.raw = ctx->env.query_string;
+        if (!ctx->env.cgit_config)
+                ctx->env.cgit_config = CGIT_CONFIG;
 }
 
 struct refmatch {
@@ -288,6 +356,8 @@ static int prepare_repo_cmd(struct cgit_context *ctx)
         if (get_sha1(ctx->qry.head, sha1)) {
                 tmp = xstrdup(ctx->qry.head);
                 ctx->qry.head = ctx->repo->defbranch;
+                ctx->page.status = 404;
+                ctx->page.statusmsg = "not found";
                 cgit_print_http_headers(ctx);
                 cgit_print_docstart(ctx);
                 cgit_print_pageheader(ctx);
@@ -379,6 +449,9 @@ static void cgit_parse_args(int argc, const char **argv)
                 if (!strcmp(argv[i], "--nocache")) {
                         ctx.cfg.nocache = 1;
                 }
+                if (!strcmp(argv[i], "--nohttp")) {
+                        ctx.env.no_http = "1";
+                }
                 if (!strncmp(argv[i], "--query=", 8)) {
                         ctx.qry.raw = xstrdup(argv[i]+8);
                 }
@@ -431,7 +504,6 @@ static int calc_ttl()
 
 int main(int argc, const char **argv)
 {
-        const char *cgit_config_env = getenv("CGIT_CONFIG");
         const char *path;
         char *qry;
         int err, ttl;
@@ -441,13 +513,8 @@ int main(int argc, const char **argv)
         cgit_repolist.count = 0;
         cgit_repolist.repos = NULL;
 
-        if (getenv("SCRIPT_NAME"))
-                ctx.cfg.script_name = xstrdup(getenv("SCRIPT_NAME"));
-        if (getenv("QUERY_STRING"))
-                ctx.qry.raw = xstrdup(getenv("QUERY_STRING"));
         cgit_parse_args(argc, argv);
-        parse_configfile(cgit_config_env ? cgit_config_env : CGIT_CONFIG,
-                         config_cb);
+        parse_configfile(ctx.env.cgit_config, config_cb);
         ctx.repo = NULL;
         http_parse_querystring(ctx.qry.raw, querystring_cb);
 
@@ -462,7 +529,7 @@ int main(int argc, const char **argv)
          * urls without the need for rewriterules in the webserver (as
          * long as PATH_INFO is included in the cache lookup key).
          */
-        path = getenv("PATH_INFO");
+        path = ctx.env.path_info;
         if (!ctx.qry.url && path) {
                 if (path[0] == '/')
                         path++;
@@ -472,12 +539,14 @@ int main(int argc, const char **argv)
                         ctx.qry.raw = xstrdup(fmt("%s?%s", path, qry));
                         free(qry);
                 } else
-                        ctx.qry.raw = ctx.qry.url;
+                        ctx.qry.raw = xstrdup(ctx.qry.url);
                 cgit_parse_url(ctx.qry.url);
         }
 
         ttl = calc_ttl();
         ctx.page.expires += ttl*60;
+        if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
+                ctx.cfg.nocache = 1;
         if (ctx.cfg.nocache)
                 ctx.cfg.cache_size = 0;
         err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
diff --git a/cgit.css b/cgit.css
index adfc8ae..e3b32e7 100644
--- a/cgit.css
+++ b/cgit.css
@@ -155,7 +155,7 @@ table.list td.logsubject {
 table.list td.logmsg {
         font-family: monospace;
         white-space: pre;
-        padding: 1em 0em 2em 0em;
+        padding: 1em 0.5em 2em 0.5em;
 }
 
 table.list td a {
diff --git a/cgit.h b/cgit.h
index 5f7af51..adb8da4 100644
--- a/cgit.h
+++ b/cgit.h
@@ -15,6 +15,7 @@
 #include <revision.h>
 #include <log-tree.h>
 #include <archive.h>
+#include <string-list.h>
 #include <xdiff-interface.h>
 #include <xdiff/xdiff.h>
 #include <utf8.h>
@@ -48,6 +49,15 @@ typedef void (*configfn)(const char *name, const char *value);
 typedef void (*filepair_fn)(struct diff_filepair *pair);
 typedef void (*linediff_fn)(char *line, int len);
 
+struct cgit_filter {
+        char *cmd;
+        char **argv;
+        int old_stdout;
+        int pipe_fh[2];
+        int pid;
+        int exitstatus;
+};
+
 struct cgit_repo {
         char *url;
         char *name;
@@ -64,6 +74,9 @@ struct cgit_repo {
         int enable_log_linecount;
         int max_stats;
         time_t mtime;
+        struct cgit_filter *about_filter;
+        struct cgit_filter *commit_filter;
+        struct cgit_filter *source_filter;
 };
 
 struct cgit_repolist {
@@ -136,6 +149,7 @@ struct cgit_config {
         char *css;
         char *favicon;
         char *footer;
+        char *head_include;
         char *header;
         char *index_header;
         char *index_info;
@@ -155,6 +169,7 @@ struct cgit_config {
         int cache_repo_ttl;
         int cache_root_ttl;
         int cache_static_ttl;
+        int embedded;
         int enable_index_links;
         int enable_log_filecount;
         int enable_log_linecount;
@@ -166,11 +181,17 @@ struct cgit_config {
         int max_repodesc_len;
         int max_stats;
         int nocache;
+        int noplainemail;
+        int noheader;
         int renamelimit;
         int snapshots;
         int summary_branches;
         int summary_log;
         int summary_tags;
+        struct string_list mimetypes;
+        struct cgit_filter *about_filter;
+        struct cgit_filter *commit_filter;
+        struct cgit_filter *source_filter;
 };
 
 struct cgit_page {
@@ -180,10 +201,27 @@ struct cgit_page {
         char *mimetype;
         char *charset;
         char *filename;
+        char *etag;
         char *title;
+        int status;
+        char *statusmsg;
+};
+
+struct cgit_environment {
+        char *cgit_config;
+        char *http_host;
+        char *https;
+        char *no_http;
+        char *path_info;
+        char *query_string;
+        char *request_method;
+        char *script_name;
+        char *server_name;
+        char *server_port;
 };
 
 struct cgit_context {
+        struct cgit_environment env;
         struct cgit_query qry;
         struct cgit_config cfg;
         struct cgit_repo *repo;
@@ -242,5 +280,9 @@ extern const char *cgit_repobasename(const char *reponame);
 
 extern int cgit_parse_snapshots_mask(const char *str);
 
+extern int cgit_open_filter(struct cgit_filter *filter);
+extern int cgit_close_filter(struct cgit_filter *filter);
+
+extern int readfile(const char *path, char **buf, size_t *size);
 
 #endif /* CGIT_H */
diff --git a/cgitrc.5.txt b/cgitrc.5.txt
index fd299ae..0d18290 100644
--- a/cgitrc.5.txt
+++ b/cgitrc.5.txt
@@ -1,203 +1,247 @@
-CGITRC
-======
+CGITRC(5)
+========
 
 
 NAME
 ----
-        cgitrc - runtime configuration for cgit
+cgitrc - runtime configuration for cgit
 
 
-DESCRIPTION
------------
+SYNOPSIS
+--------
 Cgitrc contains all runtime settings for cgit, including the list of git
 repositories, formatted as a line-separated list of NAME=VALUE pairs. Blank
 lines, and lines starting with '#', are ignored.
 
 
+LOCATION
+--------
+The default location of cgitrc, defined at compile time, is /etc/cgitrc. At
+runtime, cgit will consult the environment variable CGIT_CONFIG and, if
+defined, use its value instead.
+
+
 GLOBAL SETTINGS
 ---------------
-agefile
+about-filter::
+        Specifies a command which will be invoked to format the content of
+        about pages (both top-level and for each repository). The command will
+        get the content of the about-file on its STDIN, and the STDOUT from the
+        command will be included verbatim on the about page. Default value:
+        none.
+
+agefile::
         Specifies a path, relative to each repository path, which can be used
         to specify the date and time of the youngest commit in the repository.
         The first line in the file is used as input to the "parse_date"
         function in libgit. Recommended timestamp-format is "yyyy-mm-dd
         hh:mm:ss". Default value: "info/web/last-modified".
 
-cache-root
+cache-root::
         Path used to store the cgit cache entries. Default value:
         "/var/cache/cgit".
 
-cache-dynamic-ttl
+cache-dynamic-ttl::
         Number which specifies the time-to-live, in minutes, for the cached
         version of repository pages accessed without a fixed SHA1. Default
         value: "5".
 
-cache-repo-ttl
+cache-repo-ttl::
         Number which specifies the time-to-live, in minutes, for the cached
         version of the repository summary page. Default value: "5".
 
-cache-root-ttl
+cache-root-ttl::
         Number which specifies the time-to-live, in minutes, for the cached
         version of the repository index page. Default value: "5".
 
-cache-size
+cache-size::
         The maximum number of entries in the cgit cache. Default value: "0"
         (i.e. caching is disabled).
 
-cache-static-ttl
+cache-static-ttl::
         Number which specifies the time-to-live, in minutes, for the cached
         version of repository pages accessed with a fixed SHA1. Default value:
         "5".
 
-clone-prefix
+clone-prefix::
         Space-separated list of common prefixes which, when combined with a
         repository url, generates valid clone urls for the repository. This
         setting is only used if `repo.clone-url` is unspecified. Default value:
         none.
 
-css
+commit-filter::
+        Specifies a command which will be invoked to format commit messages.
+        The command will get the message on its STDIN, and the STDOUT from the
+        command will be included verbatim as the commit message, i.e. this can
+        be used to implement bugtracker integration. Default value: none.
+
+css::
         Url which specifies the css document to include in all cgit pages.
         Default value: "/cgit.css".
 
-enable-index-links
+embedded::
+        Flag which, when set to "1", will make cgit generate a html fragment
+        suitable for embedding in other html pages. Default value: none. See
+        also: "noheader".
+        
+enable-index-links::
         Flag which, when set to "1", will make cgit generate extra links for
         each repo in the repository index (specifically, to the "summary",
         "commit" and "tree" pages). Default value: "0".
 
-enable-log-filecount
+enable-log-filecount::
         Flag which, when set to "1", will make cgit print the number of
         modified files for each commit on the repository log page. Default
         value: "0".
 
-enable-log-linecount
+enable-log-linecount::
         Flag which, when set to "1", will make cgit print the number of added
         and removed lines for each commit on the repository log page. Default
         value: "0".
 
-favicon
+favicon::
         Url used as link to a shortcut icon for cgit. If specified, it is
         suggested to use the value "/favicon.ico" since certain browsers will
         ignore other values. Default value: none.
 
-footer
+footer::
         The content of the file specified with this option will be included
         verbatim at the bottom of all pages (i.e. it replaces the standard