Merge branch 'lh/plugins'

Conflicts:
	cgit.c
	cgit.h

7 files changed, 125 insertions, 32 deletions

diff --git a/cgit.c b/cgit.c
index aa1107a..dbec196 100644
--- a/cgit.c
+++ b/cgit.c
@@ -20,16 +20,31 @@ 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"))
                 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);
@@ -80,26 +95,30 @@ void config_cb(const char *name, const char *value)
         else if (!strcmp(name, "cache-root-ttl"))
                 ctx.cfg.cache_root_ttl = atoi(value);
         else if (!strcmp(name, "cache-repo-ttl"))
                 ctx.cfg.cache_repo_ttl = atoi(value);
         else if (!strcmp(name, "cache-static-ttl"))
                 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, "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"))
                 ctx.cfg.max_repodesc_len = atoi(value);
         else if (!strcmp(name, "max-repo-count"))
                 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"))
                 ctx.cfg.summary_branches = atoi(value);
         else if (!strcmp(name, "summary-tags"))
                 ctx.cfg.summary_tags = atoi(value);
         else if (!strcmp(name, "agefile"))
                 ctx.cfg.agefile = xstrdup(value);
@@ -134,16 +153,20 @@ void config_cb(const char *name, const char *value)
         else if (ctx.repo && !strcmp(name, "repo.enable-log-filecount"))
                 ctx.repo->enable_log_filecount = ctx.cfg.enable_log_filecount * atoi(value);
         else if (ctx.repo && !strcmp(name, "repo.enable-log-linecount"))
                 ctx.repo->enable_log_linecount = ctx.cfg.enable_log_linecount * atoi(value);
         else if (ctx.repo && !strcmp(name, "repo.max-stats"))
                 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.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);
                 else
                         ctx.repo->readme = xstrdup(fmt("%s/%s", ctx.repo->path, value));
         } else if (!strcmp(name, "include"))
                 parse_configfile(value, config_cb);
 }
diff --git a/cgit.h b/cgit.h
index 1194eb0..b8557ac 100644
--- a/cgit.h
+++ b/cgit.h
@@ -44,32 +44,43 @@
  * Default encoding
  */
 #define PAGE_ENCODING "UTF-8"
 
 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;
         char *path;
         char *desc;
         char *owner;
         char *defbranch;
         char *group;
         char *module_link;
         char *readme;
         char *clone_url;
         int snapshots;
         int enable_log_filecount;
         int enable_log_linecount;
         int max_stats;
         time_t mtime;
+        struct cgit_filter *commit_filter;
+        struct cgit_filter *source_filter;
 };
 
 struct cgit_repolist {
         int length;
         int count;
         struct cgit_repo *repos;
 };
 
@@ -172,16 +183,18 @@ struct cgit_config {
         int noplainemail;
         int noheader;
         int renamelimit;
         int snapshots;
         int summary_branches;
         int summary_log;
         int summary_tags;
         struct string_list mimetypes;
+        struct cgit_filter *commit_filter;
+        struct cgit_filter *source_filter;
 };
 
 struct cgit_page {
         time_t modified;
         time_t expires;
         size_t size;
         char *mimetype;
         char *charset;
@@ -246,10 +259,13 @@ extern char *fmt(const char *format,...);
 extern struct commitinfo *cgit_parse_commit(struct commit *commit);
 extern struct taginfo *cgit_parse_tag(struct tag *tag);
 extern void cgit_parse_url(const char *url);
 
 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);
+
 
 #endif /* CGIT_H */
diff --git a/cgitrc.5.txt b/cgitrc.5.txt
index 0412f64..dc63637 100644
--- a/cgitrc.5.txt
+++ b/cgitrc.5.txt
@@ -50,16 +50,22 @@ cache-static-ttl::
         "5".
 
 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.
 
+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".
 
 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".
@@ -201,16 +207,24 @@ snapshots::
         supported by cgit. The value is a space-separated list of zero or more
         of the following values:
                         "tar"   uncompressed tar-file
                         "tar.gz"gzip-compressed tar-file
                         "tar.bz2"bzip-compressed tar-file
                         "zip"   zip-file
         Default value: none.
 
+source-filter::
+        Specifies a command which will be invoked to format plaintext blobs
+        in the tree view. The command will get the blob content on its STDIN
+        and the name of the blob as its only command line argument. The STDOUT
+        from the command will be included verbatim as the blob contents, i.e.
+        this can be used to implement e.g. syntax highlighting. Default value:
+        none.
+
 summary-branches::
         Specifies the number of branches to display in the repository "summary"
         view. Default value: "10".
 
 summary-log::
         Specifies the number of log entries to display in the repository
         "summary" view. Default value: "10".
 
@@ -227,16 +241,19 @@ virtual-root::
         same kind of virtual urls, so this option will probably be deprecated.
 
 REPOSITORY SETTINGS
 -------------------
 repo.clone-url::
         A list of space-separated urls which can be used to clone this repo.
         Default value: none.
 
+repo.commit-filter::
+        Override the default commit-filter. Default value: <commit-filter>.
+
 repo.defbranch::
         The name of the default branch for this repository. If no such branch
         exists in the repository, the first branch name (when sorted) is used
         as default instead. Default value: "master".
 
 repo.desc::
         The value to show as repository description. Default value: none.
 
@@ -267,16 +284,19 @@ repo.path::
 repo.readme::
         A path (relative to <repo.path>) which specifies a file to include
         verbatim as the "About" page for this repo. Default value: none.
 
 repo.snapshots::
         A mask of allowed snapshot-formats for this repo, restricted by the
         "snapshots" global setting. Default value: <snapshots>.
 
+repo.source-filter::
+        Override the default source-filter. Default value: <source-filter>.
+
 repo.url::
         The relative url used to access the repository. This must be the first
         setting specified for each repo. Default value: none.
 
 
 EXAMPLE CGITRC FILE
 -------------------
 
diff --git a/shared.c b/shared.c
index cce0af4..783604b 100644
--- a/shared.c
+++ b/shared.c
@@ -57,16 +57,18 @@ struct cgit_repo *cgit_add_repo(const char *url)
         ret->defbranch = "master";
         ret->snapshots = ctx.cfg.snapshots;
         ret->enable_log_filecount = ctx.cfg.enable_log_filecount;
         ret->enable_log_linecount = ctx.cfg.enable_log_linecount;
         ret->max_stats = ctx.cfg.max_stats;
         ret->module_link = ctx.cfg.module_link;
         ret->readme = NULL;
         ret->mtime = -1;
+        ret->commit_filter = ctx.cfg.commit_filter;
+        ret->source_filter = ctx.cfg.source_filter;
         return ret;
 }
 
 struct cgit_repo *cgit_get_repoinfo(const char *url)
 {
         int i;
         struct cgit_repo *repo;
 
@@ -350,8 +352,43 @@ int cgit_parse_snapshots_mask(const char *str)
                                 rv |= f->bit;
                                 break;
                         }
                 }
                 str += tl;
         }
         return rv;
 }
+
+int cgit_open_filter(struct cgit_filter *filter)
+{
+
+        filter->old_stdout = chk_positive(dup(STDOUT_FILENO),
+                "Unable to duplicate STDOUT");
+        chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess");
+        filter->pid = chk_non_negative(fork(), "Unable to create subprocess");
+        if (filter->pid == 0) {
+                close(filter->pipe_fh[1]);
+                chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO),
+                        "Unable to use pipe as STDIN");
+                execvp(filter->cmd, filter->argv);
+                die("Unable to exec subprocess %s: %s (%d)", filter->cmd,
+                        strerror(errno), errno);
+        }
+        close(filter->pipe_fh[0]);
+        chk_non_negative(dup2(filter->pipe_fh[1], STDOUT_FILENO),
+                "Unable to use pipe as STDOUT");
+        close(filter->pipe_fh[1]);
+        return 0;
+}
+
+int cgit_close_filter(struct cgit_filter *filter)
+{
+        chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO),
+                "Unable to restore STDOUT");
+        close(filter->old_stdout);
+        if (filter->pid < 0)
+                return 0;
+        waitpid(filter->pid, &filter->exitstatus, 0);
+        if (WIFEXITED(filter->exitstatus) && !WEXITSTATUS(filter->exitstatus))
+                return 0;
+        die("Subprocess %s exited abnormally", filter->cmd);
+}
diff --git a/ui-commit.c b/ui-commit.c
index 9fdb8ee..d6b73ee 100644
--- a/ui-commit.c
+++ b/ui-commit.c
@@ -88,21 +88,29 @@ void cgit_print_commit(char *hex)
         if (ctx.repo->snapshots) {
                 html("<tr><th>download</th><td colspan='2' class='sha1'>");
                 cgit_print_snapshot_links(ctx.qry.repo, ctx.qry.head,
                                           hex, ctx.repo->snapshots);
                 html("</td></tr>");
         }
         html("</table>\n");
         html("<div class='commit-subject'>");
+        if (ctx.repo->commit_filter)
+                cgit_open_filter(ctx.repo->commit_filter);
         html_txt(info->subject);
+        if (ctx.repo->commit_filter)
+                cgit_close_filter(ctx.repo->commit_filter);
         show_commit_decorations(commit);
         html("</div>");
         html("<div class='commit-msg'>");
+        if (ctx.repo->commit_filter)
+                cgit_open_filter(ctx.repo->commit_filter);
         html_txt(info->msg);
+        if (ctx.repo->commit_filter)
+                cgit_close_filter(ctx.repo->commit_filter);
         html("</div>");
         if (parents < 3) {
                 if (parents)
                         tmp = sha1_to_hex(commit->parents->item->object.sha1);
                 else
                         tmp = NULL;
                 cgit_print_diff(ctx.qry.sha1, tmp, NULL);
         }
diff --git a/ui-snapshot.c b/ui-snapshot.c
index 5372f5d..4136b3e 100644
--- a/ui-snapshot.c
+++ b/ui-snapshot.c
@@ -7,47 +7,26 @@
  */
 
 #include "cgit.h"
 #include "html.h"
 #include "ui-shared.h"
 
 static int write_compressed_tar_archive(struct archiver_args *args,const char *filter)
 {
-        int rw[2];
-        pid_t gzpid;
-        int stdout2;
-        int status;
         int rv;
+        struct cgit_filter f;
 
-        stdout2 = chk_non_negative(dup(STDIN_FILENO), "Preserving STDOUT before compressing");
-        chk_zero(pipe(rw), "Opening pipe from compressor subprocess");
-        gzpid = chk_non_negative(fork(), "Forking compressor subprocess");
-        if(gzpid==0) {
-                /* child */
-                chk_zero(close(rw[1]), "Closing write end of pipe in child");
-                chk_zero(close(STDIN_FILENO), "Closing STDIN");
-                chk_non_negative(dup2(rw[0],STDIN_FILENO), "Redirecting compressor input to stdin");
-                execlp(filter,filter,NULL);
-                _exit(-1);
-        }
-        /* parent */
-        chk_zero(close(rw[0]), "Closing read end of pipe");
-        chk_non_negative(dup2(rw[1],STDOUT_FILENO), "Redirecting output to compressor");
-
+        f.cmd = xstrdup(filter);
+        f.argv = malloc(2 * sizeof(char *));
+        f.argv[0] = f.cmd;
+        f.argv[1] = NULL;
+        cgit_open_filter(&f);
         rv = write_tar_archive(args);
-
-        chk_zero(close(STDOUT_FILENO), "Closing STDOUT redirected to compressor");
-        chk_non_negative(dup2(stdout2,STDOUT_FILENO), "Restoring uncompressed STDOUT");
-        chk_zero(close(stdout2), "Closing uncompressed STDOUT");
-        chk_zero(close(rw[1]), "Closing write end of pipe in parent");
-        chk_positive(waitpid(gzpid,&status,0), "Waiting on compressor process");
-        if(! ( WIFEXITED(status) && WEXITSTATUS(status)==0 ) )
-                cgit_print_error("Failed to compress archive");
-
+        cgit_close_filter(&f);
         return rv;
 }
 
 static int write_tar_gzip_archive(struct archiver_args *args)
 {
         return write_compressed_tar_archive(args,"gzip");
 }
 
diff --git a/ui-tree.c b/ui-tree.c
index 61fcf5a..c608754 100644
--- a/ui-tree.c
+++ b/ui-tree.c
@@ -10,23 +10,33 @@
 #include "cgit.h"
 #include "html.h"
 #include "ui-shared.h"
 
 char *curr_rev;
 char *match_path;
 int header = 0;
 
-static void print_text_buffer(char *buf, unsigned long size)
+static void print_text_buffer(const char *name, char *buf, unsigned long size)
 {
         unsigned long lineno, idx;
         const char *numberfmt =
                 "<a class='no' id='n%1$d' name='n%1$d' href='#n%1$d'>%1$d</a>\n";
 
         html("<table summary='blob content' class='blob'>\n");
+        if (ctx.repo->source_filter) {
+                html("<tr><td class='lines'><pre><code>");
+                ctx.repo->source_filter->argv[1] = xstrdup(name);
+                cgit_open_filter(ctx.repo->source_filter);
+                write(STDOUT_FILENO, buf, size);
+                cgit_close_filter(ctx.repo->source_filter);
+                html("</code></pre></td></tr></table>\n");
+                return;
+        }
+
         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')
@@ -60,17 +70,17 @@ static void print_binary_buffer(char *buf, unsigned long size)
                         ascii[idx] = isgraph(buf[idx]) ? buf[idx] : '.';
                 ascii[idx] = '\0';
                 html_txt(ascii);
                 html("</td></tr>\n");
         }
         html("</table>\n");
 }
 
-static void print_object(const unsigned char *sha1, char *path)
+static void print_object(const unsigned char *sha1, char *path, const char *basename)
 {
         enum object_type type;
         char *buf;
         unsigned long size;
 
         type = sha1_object_info(sha1, &size);
         if (type == OBJ_BAD) {
                 cgit_print_error(fmt("Bad object name: %s",
@@ -88,17 +98,17 @@ static void print_object(const unsigned char *sha1, char *path)
         html(" (");
         cgit_plain_link("plain", NULL, NULL, ctx.qry.head,
                         curr_rev, path);
         htmlf(")<br/>blob: %s\n", sha1_to_hex(sha1));
 
         if (buffer_is_binary(buf, size))
                 print_binary_buffer(buf, size);
         else
-                print_text_buffer(buf, size);
+                print_text_buffer(basename, buf, size);
 }
 
 
 static int ls_item(const unsigned char *sha1, const char *base, int baselen,
                    const char *pathname, unsigned int mode, int stage,
                    void *cbdata)
 {
         char *name;
@@ -214,17 +224,17 @@ static int walk_tree(const unsigned char *sha1, const char *base, int baselen,
                 if (strcmp(match_path, buffer))
                         return READ_TREE_RECURSIVE;
 
                 if (S_ISDIR(mode)) {
                         state = 1;
                         ls_head();
                         return READ_TREE_RECURSIVE;
                 } else {
-                        print_object(sha1, buffer);
+                        print_object(sha1, buffer, pathname);
                         return 0;
                 }
         }
         ls_item(sha1, base, baselen, pathname, mode, stage, NULL);
         return 0;
 }