[PATCH 7/8] gitweb: hard-depend on the Digest::MD5 5.8 module

[Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>]

Since my d48b284183 ("perl: bump the required Perl version to 5.8 from
5.6.[21]", 2010-09-24), we've depended on 5.8, so there's no reason to
conditionally require Digest::MD5 anymore. It was released with perl
v5.7.3.

The initial introduction of the dependency in
e9fdd74e53 ("gitweb: (gr)avatar support", 2009-06-30) says as much,
this also undoes part of the later 2e9c8789b7 ("gitweb: Mention
optional Perl modules in INSTALL", 2011-02-04) since gitweb will
always be run on at least 5.8, so there's no need to mention
Digest::MD5 as a required module in the documentation, let's instead
say that we require perl 5.8.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
---
 gitweb/INSTALL     |  3 +--
 gitweb/gitweb.perl | 17 +++++------------
 2 files changed, 6 insertions(+), 14 deletions(-)

diff --git a/gitweb/INSTALL b/gitweb/INSTALL
index 408f2859d3..a58e6b3c44 100644
--- a/gitweb/INSTALL
+++ b/gitweb/INSTALL
@@ -29,12 +29,11 @@ Requirements
 ------------
 
  - Core git tools
- - Perl
+ - Perl 5.8
  - Perl modules: CGI, Encode, Fcntl, File::Find, File::Basename.
  - web server
 
 The following optional Perl modules are required for extra features
- - Digest::MD5 - for gravatar support
  - CGI::Fast and FCGI - for running gitweb as FastCGI script
  - HTML::TagCloud - for fancy tag cloud in project list view
  - HTTP::Date or Time::ParseDate - to support If-Modified-Since for feeds
diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index 2417057f2b..8f48e3c02e 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -490,7 +490,6 @@ our %feature = (
 	# Currently available providers are gravatar and picon.
 	# If an unknown provider is specified, the feature is disabled.
 
-	# Gravatar depends on Digest::MD5.
 	# Picon currently relies on the indiana.edu database.
 
 	# To enable system wide have in $GITWEB_CONFIG
@@ -1166,18 +1165,11 @@ sub configure_gitweb_features {
 	our @snapshot_fmts = gitweb_get_feature('snapshot');
 	@snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 
-	# check that the avatar feature is set to a known provider name,
-	# and for each provider check if the dependencies are satisfied.
-	# if the provider name is invalid or the dependencies are not met,
-	# reset $git_avatar to the empty string.
+	# check that the avatar feature is set to a known provider
+	# name, if the provider name is invalid, reset $git_avatar to
+	# the empty string.
 	our ($git_avatar) = gitweb_get_feature('avatar');
-	if ($git_avatar eq 'gravatar') {
-		$git_avatar = '' unless (eval { require Digest::MD5; 1; });
-	} elsif ($git_avatar eq 'picon') {
-		# no dependencies
-	} else {
-		$git_avatar = '';
-	}
+	$git_avatar = '' unless $git_avatar =~ /^(?:gravatar|picon)$/s;
 
 	our @extra_branch_refs = gitweb_get_feature('extra-branch-refs');
 	@extra_branch_refs = filter_and_validate_refs (@extra_branch_refs);
@@ -2165,6 +2157,7 @@ sub picon_url {
 sub gravatar_url {
 	my $email = lc shift;
 	my $size = shift;
+	require Digest::MD5;
 	$avatar_cache{$email} ||=
 		"//www.gravatar.com/avatar/" .
 			Digest::MD5::md5_hex($email) . "?s=";
-- 
2.15.1.424.g9478a66081