This patch teaches cgit to expand environment variables in certain
cgitrc option values (cache_root, scan-path, include) plus when
finding the location of cgitrc itself.
One use case for this feature is virtual hosting - e.g. by setting
$CGIT_CONFIG='/etc/cgitrc/$HTTP_HOST' in httpd.conf, all virtual
hosts automatically gets their own cgitrc.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Sometimes it is not feasible to generate the HTML pretty-print for large
files, especially if a source-filter is involved or binary data is to be
displayed. The "max-blob-size" config var allows to disable HTML output
for blobs bigger than X KBytes. Plain downloads are not affected.
Signed-off-by: Georg Lukas <georg@op-co.de>
Makes it easier to rewrite :)
lighttpd-sandbox: rewrite "/cgit.cgi?url=%{enc:request.path}&%{request.query}";
Signed-off-by: Stefan Bühler <source@stbuehler.de>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
A new config option side-by-side-diffs added, defaulting to 0,
meaning unidiff. Also a query option (ss) is used toggle this.
In the commit page you can switch between the two diff formats by
clicking on the link on the "commit"-row, to the right of (patch).
In the diff page you can switch by using the link at the start
of the page.
All commit-links and diff-links will remember the choice.
Signed-off-by: Ragnar Ouchterlony <ragnar@lysator.liu.se>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
The repo-specific 'snapshots' option is bitwise AND'ed with the global
'snapshots' option during parsing, and since the global cgitrc hasn't
been parsed when --scan-path is processed the global 'snapshots' will
always be 0 (i.e. no repo-specific 'snapshots' setting will have any
effect).
This patch fixes the issue by setting the global 'snapshots' mask to
0xFF (hence relying on later parsing of the generated cgitrc repolist
to do the right thing).
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Since repo.desc might have been populated by reading the 'description'
file in GIT_DIR, it may contain newlines. And by printing the literal
value, we may then generate an invalid cgitrc include-file.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Note: print_repo() still ignores repo.max-stats and repo.snapshots,
which both requires additional work since these settings are represented
internally as an enum and a bitmap.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This option must be enabled if repo-specific cgitrc files should be
allowed to override any of the 'filter' options.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
When recursively scanning a directory tree looking for git repositories,
cgit will now parse cgitrc files found within such repositories.
The repo-specific config files can include any repo-specific options
except 'repo.url' and 'repo.path'. Also, in such config files the 'repo.'
prefix can not be used, i.e. the valid options then becomes:
* name
* clone-url
* desc
* ower
* defbranch
* snapshots
* enable-log-filecount
* enable-log-linecount
* max-stats
* module-link
* section
* about-filter
* commit-filter
* source-filter
* readme
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
The new function repo_config() is used to handle all 'simple' repo
options, for the following reasons:
* code readability
* parser performance
* upcoming support for repo-local cgitrc files during scanning
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
The 'repo.' prefix should be reserved for repo-specific options, but
the option 'repo.group' must still be honored to stay backwards
compatible.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This makes the name of the cgitrc option more descriptive and at the
same time changes the default from "0" to "1" in an attempt to stay
backwards compatible - prior to the introduction of "source-filter"
and "linenumbers", cgit always generated linenumber links in the
tree view, but now this feature can be turned off (one might want to
do this if the source-filter performs line-wrapping etc).
While at it, the documentation is updated to match the surrounding
descriptions.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
When generating a hash for caching, ctx.qry.raw is used as key. And
since cgit_parse_url() zero-terminates it's argument (after the repo
path), ctx.qry.raw must xstrdup(ctx.qry.url).
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
The querystring_cb() function will be invoked with a NULL value when
the querystring contains a name not followed by a '='. Such a value
used to cause a segfault, which this patch fixes.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
cgit_print_http_headers() used to do nothing if 'embedded' was
specified in cgitrc, but that was wrong - we never want to skip the
headers when invoked as a CGI app. Sadly, there's no easy way to
detect if we're invoked as a CGI app or if we're invoked by another
CGI app, so for the latter case cgit needs to be invoked with either
--nohttp on the command line or NO_HTTP=1 in the environment.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
These options can be used to execute a filter command on each about-page,
both top-level and for each repository (repo.about-filter can be used
to override the current about-filter).
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
If e.g. repo.commit-filter is specified as an empty string, this
is now properly handled as disabling the global commit-filter setting
for the current repository.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This new option specifies a filter which is executed on the commit
message, i.e. the commit message is written to the filters STDIN and
the filters STDOUT is included verbatim as the commit message.
This can be used to implement commit linking by creating a simple
shell script in e.g. /usr/bin/cgit-commit-filter.sh like this:
#/bin/sh
sed -re 's|\b([0-9a-fA-F]{6,40})\b|<a href="./?id=\1">\1</a>|g'
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This new option is used to specify an external command which will be
executed when displaying blob content in the tree view. Blob content
will be written to STDIN of the filter and STDOUT from the filter
will be included verbatim in the html output from cgit. The file name
of the blob will be passed as the only argument to the filter command.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
The functions cgit_open_filter() and cgit_close_filter() can be used to
execute filters on the output stream from cgit.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This patch makes it possible to register mappings from filename
extension to mime type in cgitrc and use this mapping when returning
blob content in `plain` view.
The reason for adding this mapping to cgitrc (as opposed to parsing
something like /etc/mime.types) is to allow quick lookup of a limited
number of filename extensions (/etc/mime-types on my machine currently
contains over 700 entries).
NB: A nice addition to this patch would be to parse /etc/mime.types
when `plain` view is requested for a file with an extension for which
there is no mapping registered in cgitrc.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This option can be used to disable the standard cgit page header, which
might be useful in combination with the 'embedded' option.
Suggested-by: Mark Constable <markc@renta.net>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This patch adds an option to the configuration file, "head-include",
which works just like "header" or "footer", except the content is put
into the HTML's <head> tag.
When downloading a blob identified by its path, the client might want
to know if the blob has been modified since a previous download of the
same path. To this end, an ETag containing the blob SHA1 seems to be
ideal.
Todo: add support for HEAD requests...
Suggested-by: Owen Taylor <otaylor@redhat.com>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
When activated, cgit will neither generate http headers nor any 'framing'
html elements (like <html> and <body>). Also, all page content is now
wrapped in a <div id='cgit'> element to make it easier to select the
correct cgit classes when embedded/themed.
Suggested-by: Matt Sealey <matt@genesi-usa.com>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
When an unknown page is requested, either on the querystring or via
PATH_INFO, we end up with a null-referencing cgit_cmd. This null-
pointer is then used as argument to the hc() function (which decides
what tab to render as 'active'), but this function failed to check if a
valid cmd was specified and a SEGFAULT would occur. This patch fixes the
issue by introducing a 'fallback-cmd' which specifies what tab to render
as 'active' when no valid cmd is requested.
While at it, we now also keep track of the active repository even if an
invalid cmd was requested since we want to show the error message about
the invalid request in the correct context.
Noticed-by: Robin Redeker <elmex@ta-sa.org>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
SCRIPT_NAME is used as fallback for virtual-root when virtual-root is
unspecified in cgitrc and PATH_INFO is used as fallback for the query-
string parameter 'url' when the latter is unspecified. But until now,
the use of PATH_INFO depended on virtual-root also being unspecified,
i.e. it was impossible to use PATH_INFO when virtual-root was specified.
This commit makes the fallback on SCRIPT_NAME and PATH_INFO independent
code paths, i.e. it is now possible to specify virtual-root in cgitrc
while still using PATH_INFO (instead of rewrite rules) to get 'pretty
urls'.
Noticed-by: Jack Moffitt <jack@chesspark.com>
Noticed-by: LiKai Liu <liulk@cs.bu.edu>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
The new 'max-stats' and 'repo.max-stats' settings makes it possible to
define the maximum statistics period, both globally and per repo. Hence,
it is now feasible to allow statistics on repositories with a high commit
frequency, like linux-2.6, by setting repo.max-stats to e.g. 'month'.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This new page, which is disabled by default, can be used to print some
statistics about the number of commits per period in the repository,
where period can be either weeks, months, quarters or years.
The function can be activated globally by setting 'enable-stats=1' in
cgitrc and disabled for individual repos by setting 'repo.enable-stats=0'.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Some users prefer to see the full message, so to make these users happy
the new querystring parameter "showmsg" can be used to print the full
commit message per log entry.
A link is provided in the log heading to make this function accessible,
and all links and forms tries to preserve the users preference.
Note: the new link is not displayed on the summary page since the point
of the summary page is to be a summary, but it is still obeyed if specified
manually.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This flag is set when no HEAD is specified in the querystring. Currently
it has no users, but it will be used by ui-snapshot to invoke a DWIM-mode
where the revision is extracted from the snapshot name.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This option makes cgit scan a directory tree looking for git repositories,
generating suitable definitions for a cgitrc file on stdout.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This commit makes cgit use the cgi variables SCRIPT_NAME and PATH_INFO
when virtual-root is unspecified in cgitrc and no url-parameter is
specified on the querystring. This has two nice effects:
* Virtual urls works out of the box, no more need for rewrite-rules in httpd.
* Virtual urls with special querystring characters are handled correctly.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
When `local-time` is set, commit, tag and patch timestamps will be printed
in the servers timezone. Also, regardless of the value of `local-time`,
these timestamps will now always show the timezone.
Signed-off-by: Stefan Naewe <stefan.naewe@atlas-elektronik.com>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
The default max-length used when printing commit messages and repo
descriptions can be increased due to the new layout (no sidebar).
Also, on the repo summary page I believe it makes sense to only show the
ten most recent branches and tags by default, just as it makes sense to
show the ten most recent commit messages for the active branch.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
The new cgitrc option `footer` can be used to include a html-file which
replaces the standard 'generated by cgit' message at the bottom of each
page.
Suggested-by: Peter Danenberg <pcd@wikitex.org>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
If print_slot() fails, the client will be served an inferior response.
This patch makes sure that such an error will be returned to main(), which
in turn will try to inform about the error in the response itself.
The error is also printed to the cache_log, i.e. stderr, which will make
the error message appear in error_log (atleast when httpd==apache).
Noticed-by: Jim Meyering <jim@meyering.net>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This enables a pager on the repolist which restricts the number of entries
displayed per page, controlled by the new option `max-repo-count` (default
value 50).
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
When cgit_cmd.want_repo was 0, we used to assume that the cmd would never
be invoked for a repo. But soon this will become untrue (the 'about' cmd
is rapidly approching), so from now on we will initialize any requested
repo even if want_repo==0 (and return an error if want_repo==1 but no repo
is specified).
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
The 'index-info' option got lost when the layout was converted from
sidebar to old-fashioned header (noticed by Harley Laue, thanks!), and
this commit re-enables it.
But there is now also an alternative in the 'root-desc' option; where
'index-info' specifies a file to include, 'root-desc' specifies the text
literally. This might be nicer for the one-liner descriptions which these
options typically provides.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
The original caching layer in cgit has no upper bound on the number of
concurrent cache entries, so when cgit is traversed by a spider (like the
googlebot), the cache might end up filling your disk. Also, if any error
occurs in the cache layer, no content is returned to the client.
This patch redesigns the caching layer to avoid these flaws by
* giving the cache a bound number of slots
* disabling the cache for the current request when errors occur
The cache size limit is implemented by hashing the querystring (the cache
lookup key) and generating a cache filename based on this hash modulo the
cache size. In order to detect hash collisions, the full lookup key (i.e.
the querystring) is stored in the cache file (separated from its associated
content by ascii 0).
The cache filename is the reversed 8-digit hexadecimal representation of
hash(key) % cache_size
which should make the filesystem lookup pretty fast (if directory content
is indexed/sorted); reversing the representation avoids the problem where
all keys have equal prefix.
There is a new config option, cache-size, which sets the upper bound for
the cache. Default value for this option is 0, which has the same effect
as setting nocache=1 (hence nocache is now deprecated).
Included in this patch is also a new testfile which verifies that the
new option works as intended.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This global variable is used by the config parsing callback to keep track
of the currently configured repository. If it is not reset to NULL when
the config parser is finished, and neither `url` or `r` is specified on the
querystring, cgit will wrongly consider the last configured repo as
selected.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
The functions found in cache.c are only used by cgit.c, so there's no
point in rebuilding all object files when the cache interface is changed.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
With the matching Makefile change, this makes sure that only cgit.o and cgit
proper needs to be rebuildt when VERSION has been modified.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This struct is used when generating http headers, and as such is another
small step towards the goal of the whole cleanup series; to invoke each
page/view function with a function pointer.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
All html-functions can be quite easily separated from the rest of cgit, so
lets do it; the only issue was html_filemode which uses some git-defined
macros so the function is moved into ui-shared.c::cgit_print_filemode().
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Using the functions offered by libgit feels like the right thing to do. Also,
make sure that config errors gets properly reported.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This removes the global variable which is used to keep track of the
currently selected repository, and adds a new variable in the cgit_context
structure.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This removes another big set of global variables, and introduces the
cgit_prepare_context() function which populates a context-variable with
compile-time default values.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This struct will hold all the cgit runtime information currently found in
a multitude of global variables.
The first cleanup removes all querystring-related variables.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
When no branch is specified and the repository does not have a default branch,
use the first branch.
Also, print sensible errormessages when the repository does not contain any
branches and when invalid branchnames are specified.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
The new view mimics the output from `git format-patch`, making it possible
to cherry-pick directly from cgit with something like `curl $url | git am`.
Inspired by a patch to `git-apply` by Mike Hommey:
http://thread.gmane.org/gmane.comp.version-control.git/67611/focus=67610
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This makes the log searching more explicit, using a dropdown box to specify
the commit field to match against.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This enables the new urls $repo/refs, $repo/refs/heads and $repo/refs/tags,
which can be used to print _all_ branches and/or tags.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
* 'master' of git://git.klever.net/patchwork/cgit:
link raw blob from tree file view
fix: changed view link to blob in summary.
allow selective enabling of snapshots
shorten snapshot names to repo basename
introduce cgit_repobasename
added snapshot filename to the link
add plain uncompressed tar snapshort format
introduced .tar.bz2 snapshots
compress .tar.gz using gzip as a filter
added a chk_non_negative check
css: adjust vertical-align of commit info th cells
add support for snapshot tarballs
Conflicts:
ui-summary.c
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This file implements the tag-command, i.e. printing of annotated tags.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
snapshot configuration parameter now can be a
space/slash/comma/colon/semicolon/pipe-separated list of snaphot suffixes as
listed in ui-snapshot.c
Signed-off-by: Michael Krelin <hacker@klever.net>
- reworked cgit_print_snapshot to use a list of supported archivers and pick
one for the suffix supplied
- moved printing of snaphot links into ui-snapshot and make it iterate through
the said list
* lh/menu:
Add ofs argument to cgit_log_link and use it in ui-log.c
Add trim_end() and use it to remove trailing slashes from repo paths
Do not include current path in the "tree" menu link
Add setting to enable/disable extra links on index page
Change S/L/T to summary/log/tree
Change "files" to "tree"
Include querystring as part of cached filename for repo summary page
Add more menuitems on repo pages
When adding support for the h parameter to the summary page (passing current
branch between pages), the builtin cache returned basically random results
for summary page since the cached filename didn't honour the querystring.
This fixes the issue for now, but someday it might be worthwhile to generate
'canonical' filenames in the cache for all pages, i.e. something a bit more
clever than just including the querystring.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
A new script, gen-version.sh, is now invoked from 'make version' to generate
the file VERSION. This file contains a version identifier generated by
git-describe and is included in the Makefile.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This adds a new function used to generate links to the diff page and uses
it everywhere such links appear (expect for single files in the diffstat
displayed on the commit page: this is now a link to the tree page).
The updated diff-page now expects zero, one or two revision specifiers, in
parameters head, id and id2. Id defaults to head unless otherwise specified,
while head (as usual) defaults to repo.defbranch. If id2 isn't specified, it
defaults to the first parent of id1.
The most important change is of course that now all repo pages (summary, log,
tree, commit and diff) has support for passing on the current branch and
revision, i.e. the road is now open for a 'static' menu with links to all
of these pages.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This teaches ui-log to prefer id=sha1 and fallback to h=rev if no id-
parameter is specified. With this change, summary, log, commit and tree
views now passes current branch using h parameter and current revision
using id parameter.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This adds a function to generate links to the commit page and extends said
page to use id from querystring as primary revision specified (fallback to
h).
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This teaches ui-tree to show both trees and blobs, thereby making ui-view
superfluous. At the same time, ui-tree is extended to honour the specified
path instead of requiering a tree/blob sha1.
This makes is possible to use repo-urls like '/pub/scm/git/git.git' and
even add path specifications, like '/pub/scm/git/git.git/log/documentation'.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
The commitdiff will be generated against the first parent, and the
diff page also gets the benefit of repo.defbranch.
Cleaned up some bad whitespace in cgit.h while at it.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Pages which expect head to be specified in the querystring can now be
given a default value, configurable per repository (via repo.defbranch,
which defaults to "master").
Currently, only the log page actually works without parameters, but the
defbranch is bound to be exploited.
This also removes some dead code from shared.c
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Also, let the makefile define the name of the installed cgi and
use that definition as a default value for cgit_script_name variable.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Pass CGIT_CONFIG from makefile during build, to enable stuff like
make CGIT_CONFIG=/var/cgit/cgit.conf
Noticed by Kristian Høgsberg <krh@bitplanet.net>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This enables path-filtering in log-view, and adds a link per entry in
tree-view to show the log for each file/directory.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
A link is added next to each parent of a commit, leading to the new
diff-functionality in ui-diff.c.
Also added support for a path-parameter to filelevel diffs accessed via the
diffstat.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This enabled customizing number of commits shown per page in log view. It
also changes the default from 100 to 50, mainly due to the more cpu
intensive log pages (number of files/lines changed) but also since 100
log messages requires excessive scrolling.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Snapshots can now be enabled/disabled by default for all repositories in
cgitrc with param "snapshots". Additionally, any repo can override the
default setting with param "repo.snapshots".
By default, no snapshotting is enabled.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Make a link from the commit viewer to a snapshot of the corresponding tree.
Currently only zip-format is supported.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This makes cgit read all repo-info from the configfile, instead of scanning for
possible git-dirs below a common root path. This is primarily done to get
better security (separate physical path from logical repo-name).
In /etc/cgitrc each repo is registered with the following keys:
repo.url
repo.name
repo.path
repo.desc
repo.owner
Note:
*Required keys are repo.url and repo.path, all others are optional
*Each occurrence of repo.url starts a new repository registration
*Default value for repo.name is taken from repo.url
*The value of repo.url cannot contain characters with special meaning for
urls (i.e. one of /?%&), while repo.name can contain anything.
Example:
repo.url=cgit-pub
repo.name=cgit/public
repo.path=/pub/git/cgit
repo.desc=My public cgit repo
repo.owner=Lars Hjemli
repo.url=cgit-priv
repo.name=cgit/private
repo.path=/home/larsh/src/cgit/.git
repo.desc=My private cgit repo
repo.owner=Lars Hjemli
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This adds the ability to show a search box in any pageheader with correct href and
hidden form data, but does not enable the box on any pages.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
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>
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>
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>
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>
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>
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>
