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b13e3eacef
e5d3de5 (gitweb: use Perl built-in utf8 function for UTF-8 decoding.,
2007-12-04) was meant to make gitweb faster by using Perl's internals
(see subsection "Messing with Perl's Internals" in Encode(3pm) manpage)
Simple benchmark confirms that (old = 00f429a, new = this version):
old new
old -- -65%
new 189% --
Unfortunately it made fallback mode of to_utf8 do not work... except
for default value 'latin1' of $fallback_encoding ('latin1' is Perl
native encoding), which is why it was not noticed for such long time.
utf8::valid(STRING) is an internal function that tests whether STRING
is in a _consistent state_ regarding UTF-8. It returns true is
well-formed UTF-8 and has the UTF-8 flag on _*or*_ if string is held
as bytes (both these states are 'consistent'). For gitweb the second
option was true, as output from git commands is opened without ':utf8'
layer.
What made it work at all for STRING in 'latin1' encoding is the fact
that utf8:decode(STRING) turns on UTF-8 flag only if source string is
valid UTF-8 and contains multi-byte UTF-8 characters... and that if
string doesn't have UTF-8 flag set it is treated as in native Perl
encoding, i.e. 'latin1' / 'iso-8859-1' (unless native encoding it is
EBCDIC ;-)). It was ':utf8' layer that actually converted 'latin1'
(no UTF-8 flag == native == 'latin1) to 'utf8'.
Let's make use of the fact that utf8:decode(STRING) returns false if
STRING is invalid as UTF-8 to check whether to enable fallback mode.
Signed-off-by: Jakub Narebski <jnareb@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
GIT web Interface ================= The one working on: http://git.kernel.org/ From the git version 1.4.0 gitweb is bundled with git. Build time gitweb configuration ------------------------------- There are many configuration variables which affect building gitweb (among others creating gitweb.cgi out of gitweb.perl by replacing placeholders such as `++GIT_BINDIR++` by their build-time values). Building and installing gitweb is described in gitweb's INSTALL file (in 'gitweb/INSTALL'). Runtime gitweb configuration ---------------------------- Gitweb obtains configuration data from the following sources in the following order: 1. built-in values (some set during build stage), 2. common system-wide configuration file (`GITWEB_CONFIG_COMMON`, defaults to '/etc/gitweb-common.conf'), 3. either per-instance configuration file (`GITWEB_CONFIG`, defaults to 'gitweb_config.perl' in the same directory as the installed gitweb), or if it does not exists then system-wide configuration file (`GITWEB_CONFIG_SYSTEM`, defaults to '/etc/gitweb.conf'). Values obtained in later configuration files override values obtained earlier in above sequence. You can read defaults in system-wide GITWEB_CONFIG_SYSTEM from GITWEB_CONFIG by adding read_config_file($GITWEB_CONFIG_SYSTEM); at very beginning of per-instance GITWEB_CONFIG file. In this case settings in said per-instance file will override settings from system-wide configuration file. Note that read_config_file checks itself that the $GITWEB_CONFIG_SYSTEM file exists. The most notable thing that is not configurable at compile time are the optional features, stored in the '%features' variable. Ultimate description on how to reconfigure the default features setting in your `GITWEB_CONFIG` or per-project in `project.git/config` can be found as comments inside 'gitweb.cgi'. See also gitweb.conf(5) manpage. Web server configuration ------------------------ Gitweb can be run as CGI script, as legacy mod_perl application (using ModPerl::Registry), and as FastCGI script. You can find some simple examples in "Example web server configuration" section in INSTALL file for gitweb (in gitweb/INSTALL). See "Webserver configuration" and "Advanced web server setup" sections in gitweb(1) manpage. AUTHORS ------- Originally written by: Kay Sievers <kay.sievers@vrfy.org> Any comment/question/concern to: Git mailing list <git@vger.kernel.org>