cgit/filter.c, branch lf/filter

filter: refactor cgit_new_filter()

2014-01-14T01:05:14Z

Use prefixcmp() as a preparation for using strip_prefix() later. Also, interpret the command as a file name if it contains a colon but none of the filter prefixes matches instead of bailing out and adding a special check for Windows. Signed-off-by: Lukas Fleischer

filter: style tweaks

2014-01-14T01:00:07Z

Signed-off-by: Jason A. Donenfeld

filter: add page source to email filter

2014-01-14T01:00:07Z

Since the email filter is called from lots of places, the script might benefit from knowing the origin. That way it can modify its contents and/or size depending. Signed-off-by: Jason A. Donenfeld

filter: add support for email filter

2014-01-14T01:00:07Z

Signed-off-by: Jason A. Donenfeld

filter: return on null filter from open and close

2014-01-14T01:00:07Z

So that we don't have to include the if(filter) open_filter(filter) block everywhere, we introduce the guard in the function itself. This should simplify quite a bit of code. Signed-off-by: Jason A. Donenfeld

filter: add lua support

2014-01-14T01:00:07Z

Signed-off-by: Jason A. Donenfeld

filter: basic write hooking infrastructure

2014-01-14T01:00:07Z

Filters can now call hook_write and unhook_write if they want to redirect writing to stdout to a different function. This saves us from potential file descriptor pipes and other less efficient mechanisms. We do this instead of replacing the call in html_raw because some places stdlib's printf functions are used (ui-patch or within git itself), which has its own internal buffering, which makes it difficult to interlace our function calls. So, we dlsym libc's write and then override it in the link stage. While we're at it, we move considerations of argument count into the generic new filter handler. Signed-off-by: Jason A. Donenfeld

filter: allow for cleanup hook for filter types

2014-01-14T01:00:07Z

At some point, we're going to want to do lazy deallocation of filters. For example, if we implement lua, we'll want to load the lua runtime once for each filter, even if that filter is called many times. Similarly, for persistent exec filters, we'll want to load it once, despite many open_filter and close_filter calls, and only reap the child process at the end of the cgit process. For this reason, we add here a cleanup function that is called at the end of cgit's main(). Signed-off-by: Jason A. Donenfeld

filter: introduce "filter type" prefix

2014-01-14T01:00:07Z

This allows different filter implementations to be specified in the configuration file. Currently only "exec" is supported, but it may now be specified either with or without the "exec:" prefix. Signed-off-by: John Keeping

filter: add interface layer

2014-01-14T01:00:07Z

Change the existing cgit_{open,close,fprintf}_filter functions to delegate to filter-specific implementations accessed via function pointers on the cgit_filter object. We treat the "exec" filter type slightly specially here by putting its structure definition in the header file and providing an "init" function to set up the function pointers. This is required so that the ui-snapshot.c code that applies a compression filter can continue to use the filter interface to do so. Signed-off-by: John Keeping