Minor style fixes

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Add missing diff-link in ui-commit.c

Gaah.

This should have been a part of 36aba00273e7af1b94bf8c5dd5068709d983d01e

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Only show first 80 characters of commit subject in log and summary

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Add missing ttl-options in config

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

cgit 0.1

With a working diff, it really has all the basics.

Next steps will be to make it more usable and less ugly :)

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Let make know that ui-diff.c depends on xdiff.h

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Add basic diff view

Finally, xdiff is used to show per-file diffs via commit view.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Use html_filemode in ui-tree.c

No reason to show "100644" when we can show "-rw-r--r--"

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Don't show new and old filemode for added/removed files

It gives us no extra info whatsoever to show "----------" for either new
or old mode, it's just noise (especially since we now show the "old"
filemode for deleted files)

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Show list of modified files in ui-commit.c

Compare current commit with 1.parent, and for each affected file display
current filemode, old filemode if changed, current filename and source
filename if it was a copy/rename.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Reformat code to avoid excessive line lengths

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Add cgit_free_commitinfo() and use where needed

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Simplify ui-commit.c

Replace the call to lookup_commit() with a call to lookup_commit_reference,
since it handles reading and parsing of the commit object internally.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Show emails and timestamps in ui-commit.c

Use the extra info found in commitinfo struct when generating commit
view.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Teach commit parser about author/committer email + timestamp

We want all four of these when showing a commit, so save them in the
commitinfo struct.

Btw: There's probably no good reason to save committer timestamp since
it's already available in commit->date. But it doesn't hurt us either,
and it makes the parser look more complete, so we just do it.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Allow relative paths for cgit_cache_root

Make sure we chdir(2) back to the original getcwd(2) when a page
has been generated. Also, if the cgit_cache_root do not exist,
try to create it.

This is a feature intended to ease testing/debugging.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Add cache-root option to /cgit/rc

Somehow, this option was forgotten when parsing the configfile.

Add it.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Add argument parsing + switch for uncached operation

This adds support for the following options to cgit:
  --root=<path>
  --cache=<path>
  --nocache
  --query=<querystring>
  --repo=<reponame>
  --page=<pagename>
  --head=<branchname>
  --sha1=<sha1>
  --ofs=<number>

On startup, /etc/cgitrc is parsed, followed by argument parsing and
finally querystring parsing.

If --nocache is specified (or set in /etc/gitrc), caching is disabled and
cgit instead generates pages to stdout.

The combined effect of these two changes makes testing/debugging a lot
less painfull.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Add head comment to shared.c

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Add head comment to ui-commit.c

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

gitweb ripoff: set tr:hover to highligt current row

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Make repo header a link to summary page

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Move cgit_print_date into ui-shared, reuse in ui-summary

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Add ui-commit.c + misc ui cleanups

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Add a common commit parser

Make a better commit parser, replacing the ugly one in ui-log.c

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Add simple pager to log page

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Add separate makefile-rule to clear current cache

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Remove implementation details from README

Let README describe the "bigger picture" instead.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Small layout adjustments to summary and blob view

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Add display of tree content w/ui-tree.c

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

cache_lock: do xstrdup/free on lockfile

Since fmt() uses 8 alternating static buffers, and cache_lock might call
cache_create_dirs() multiple times, which in turn might call fmt() twice,
after four iterations lockfile would be overwritten by a cachedirectory
path.

In worst case, this could cause the cachedirectory to be unlinked and replaced
by a cachefile.

Fix: use xstrdup() on the result from fmt() before assigning to lockfile, and
call free(lockfile) before exit.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Don't truncate valid cachefiles

An embarrassing thinko in cgit_check_cache() would truncate valid cachefiles
in the following situation:
  1) process A notices a missing/expired cachefile
  2) process B gets scheduled, locks, fills and unlocks the cachefile
  3) process A gets scheduled, locks the cachefile, notices that the cachefile
     now exist/is not expired anymore, and continues to overwrite it with an
     empty lockfile.

Thanks to Linus for noticing (again).

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Move global variables + callback functions into shared.c

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Move functions for generic object output into ui-view.c

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Move log-functions into ui-log.c

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Move repo summary functions into ui-summary.c

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Move functions for repolist output into ui-repolist.c

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Move common output-functions into ui-shared.c

While at it, replace the cgit_[lib_]error constants with a proper function

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Rename config.c to parsing.c + move cgit_parse_query from cgit.c to parsing.c

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Avoid infinite loops in caching layer

Add a global variable, cgit_max_lock_attemps, to avoid the possibility of
infinite loops when failing to acquire a lockfile. This could happen on
broken setups or under crazy server load.

Incidentally, this also fixes a lurking bug in cache_lock() where an
uninitialized returnvalue was used.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Let 'make install' clear all cachefiles

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Fix cache algorithm loophole

This closes the door for unneccessary calls to cgit_fill_cache().

Noticed by Linus.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Add version identifier in generated files

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Add license file and copyright notices

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Add caching infrastructure

This enables internal caching of page output.

Page requests are split into four groups:
  1) repo listing (front page)
  2) repo summary
  3) repo pages w/symbolic references in query string
  4) repo pages w/constant sha1's in query string

Each group has a TTL specified in minutes. When a page is requested, a cached
filename is stat(2)'ed and st_mtime is compared to time(2). If TTL has expired
(or the file didn't exist), the cached file is regenerated.

When generating a cached file, locking is used to avoid parallell processing
of the request. If multiple processes tries to aquire the same lock, the ones
who fail to get the lock serves the (expired) cached file. If the cached file
don't exist, the process instead calls sched_yield(2) before restarting the
request processing.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Add .gitignore

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Replace useless make rules with generic $(OBJECTS) dependency

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Import cgit prototype from git tree

This enables basic cgit functionality, using libgit.a and xdiff/lib.a from
git + a custom "git.h" + openssl for sha1 routines.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>