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
@@ -25,6 +25,21 @@ void add_mimetype(const char *name, const char *value)
         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"))
@@ -85,6 +100,8 @@ 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, "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"))
@@ -95,6 +112,8 @@ 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"))
@@ -139,6 +158,10 @@ 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.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);
diff --git a/cgit.h b/cgit.h
index 1194eb0..b8557ac 100644
--- a/cgit.h
+++ b/cgit.h
@@ -49,6 +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;
@@ -65,6 +74,8 @@ struct cgit_repo {
         int enable_log_linecount;
         int max_stats;
         time_t mtime;
+        struct cgit_filter *commit_filter;
+        struct cgit_filter *source_filter;
 };
 
 struct cgit_repolist {
@@ -177,6 +188,8 @@ struct cgit_config {
         int summary_log;
         int summary_tags;
         struct string_list mimetypes;
+        struct cgit_filter *commit_filter;
+        struct cgit_filter *source_filter;
 };
 
 struct cgit_page {
@@ -251,5 +264,8 @@ 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
@@ -55,6 +55,12 @@ clone-prefix::
         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".
@@ -206,6 +212,14 @@ snapshots::
                 "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".
@@ -232,6 +246,9 @@ 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
@@ -272,6 +289,9 @@ 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.
diff --git a/shared.c b/shared.c
index cce0af4..783604b 100644
--- a/shared.c
+++ b/shared.c
@@ -62,6 +62,8 @@ struct cgit_repo *cgit_add_repo(const char *url)
         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;
 }
 
@@ -355,3 +357,38 @@ int cgit_parse_snapshots_mask(const char *str)
         }
         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
@@ -93,11 +93,19 @@ void cgit_print_commit(char *hex)
         }
         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)
diff --git a/ui-snapshot.c b/ui-snapshot.c
index 5372f5d..4136b3e 100644
--- a/ui-snapshot.c
+++ b/ui-snapshot.c
@@ -12,37 +12,16 @@
 
 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;
 }
 
diff --git a/ui-tree.c b/ui-tree.c
index 61fcf5a..c608754 100644
--- a/ui-tree.c
+++ b/ui-tree.c
@@ -15,13 +15,23 @@ 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;
@@ -65,7 +75,7 @@ static void print_binary_buffer(char *buf, unsigned long size)
         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;
@@ -93,7 +103,7 @@ static void print_object(const unsigned char *sha1, char *path)
         if (buffer_is_binary(buf, size))
                 print_binary_buffer(buf, size);
         else
-                print_text_buffer(buf, size);
+                print_text_buffer(basename, buf, size);
 }
 
 
@@ -219,7 +229,7 @@ static int walk_tree(const unsigned char *sha1, const char *base, int baselen,
                         ls_head();
                         return READ_TREE_RECURSIVE;
                 } else {
-                        print_object(sha1, buffer);
+                        print_object(sha1, buffer, pathname);
                         return 0;
                 }
         }