diff options
| -rwxr-xr-x | git-svn.perl | 31 | ||||
| -rw-r--r-- | perl/Git/SVN/Memoize/YAML.pm | 93 | ||||
| -rw-r--r-- | perl/Makefile.PL | 1 |
3 files changed, 119 insertions, 6 deletions
diff --git a/git-svn.perl b/git-svn.perl index 24c0af2..0b074c4 100755 --- a/git-svn.perl +++ b/git-svn.perl @@ -2055,6 +2055,10 @@ use Time::Local; use Memoize; # core since 5.8.0, Jul 2002 use Memoize::Storable; use POSIX qw(:signal_h); +my $can_use_yaml; +BEGIN { + $can_use_yaml = eval { require Git::SVN::Memoize::YAML; 1}; +} my ($_gc_nr, $_gc_period); @@ -3577,6 +3581,17 @@ sub has_no_changes { command_oneline("rev-parse", "$commit~1^{tree}")); } +sub tie_for_persistent_memoization { + my $hash = shift; + my $path = shift; + + if ($can_use_yaml) { + tie %$hash => 'Git::SVN::Memoize::YAML', "$path.yaml"; + } else { + tie %$hash => 'Memoize::Storable', "$path.db", 'nstore'; + } +} + # The GIT_DIR environment variable is not always set until after the command # line arguments are processed, so we can't memoize in a BEGIN block. { @@ -3589,22 +3604,26 @@ sub has_no_changes { my $cache_path = "$ENV{GIT_DIR}/svn/.caches/"; mkpath([$cache_path]) unless -d $cache_path; - tie my %lookup_svn_merge_cache => 'Memoize::Storable', - "$cache_path/lookup_svn_merge.db", 'nstore'; + my %lookup_svn_merge_cache; + my %check_cherry_pick_cache; + my %has_no_changes_cache; + + tie_for_persistent_memoization(\%lookup_svn_merge_cache, + "$cache_path/lookup_svn_merge"); memoize 'lookup_svn_merge', SCALAR_CACHE => 'FAULT', LIST_CACHE => ['HASH' => \%lookup_svn_merge_cache], ; - tie my %check_cherry_pick_cache => 'Memoize::Storable', - "$cache_path/check_cherry_pick.db", 'nstore'; + tie_for_persistent_memoization(\%check_cherry_pick_cache, + "$cache_path/check_cherry_pick"); memoize 'check_cherry_pick', SCALAR_CACHE => 'FAULT', LIST_CACHE => ['HASH' => \%check_cherry_pick_cache], ; - tie my %has_no_changes_cache => 'Memoize::Storable', - "$cache_path/has_no_changes.db", 'nstore'; + tie_for_persistent_memoization(\%has_no_changes_cache, + "$cache_path/has_no_changes"); memoize 'has_no_changes', SCALAR_CACHE => ['HASH' => \%has_no_changes_cache], LIST_CACHE => 'FAULT', diff --git a/perl/Git/SVN/Memoize/YAML.pm b/perl/Git/SVN/Memoize/YAML.pm new file mode 100644 index 0000000..9676b8f --- /dev/null +++ b/perl/Git/SVN/Memoize/YAML.pm @@ -0,0 +1,93 @@ +package Git::SVN::Memoize::YAML; +use warnings; +use strict; +use YAML::Any (); + +# based on Memoize::Storable. + +sub TIEHASH { + my $package = shift; + my $filename = shift; + my $truehash = (-e $filename) ? YAML::Any::LoadFile($filename) : {}; + my $self = {FILENAME => $filename, H => $truehash}; + bless $self => $package; +} + +sub STORE { + my $self = shift; + $self->{H}{$_[0]} = $_[1]; +} + +sub FETCH { + my $self = shift; + $self->{H}{$_[0]}; +} + +sub EXISTS { + my $self = shift; + exists $self->{H}{$_[0]}; +} + +sub DESTROY { + my $self = shift; + YAML::Any::DumpFile($self->{FILENAME}, $self->{H}); +} + +sub SCALAR { + my $self = shift; + scalar(%{$self->{H}}); +} + +sub FIRSTKEY { + 'Fake hash from Git::SVN::Memoize::YAML'; +} + +sub NEXTKEY { + undef; +} + +1; +__END__ + +=head1 NAME + +Git::SVN::Memoize::YAML - store Memoized data in YAML format + +=head1 SYNOPSIS + + use Memoize; + use Git::SVN::Memoize::YAML; + + tie my %cache => 'Git::SVN::Memoize::YAML', $filename; + memoize('slow_function', SCALAR_CACHE => [HASH => \%cache]); + slow_function(arguments); + +=head1 DESCRIPTION + +This module provides a class that can be used to tie a hash to a +YAML file. The file is read when the hash is initialized and +rewritten when the hash is destroyed. + +The intent is to allow L<Memoize> to back its cache with a file in +YAML format, just like L<Memoize::Storable> allows L<Memoize> to +back its cache with a file in Storable format. Unlike the Storable +format, the YAML format is platform-independent and fairly stable. + +Carps on error. + +=head1 DIAGNOSTICS + +See L<YAML::Any>. + +=head1 DEPENDENCIES + +L<YAML::Any> from CPAN. + +=head1 INCOMPATIBILITIES + +None reported. + +=head1 BUGS + +The entire cache is read into a Perl hash when loading the file, +so this is not very scalable. diff --git a/perl/Makefile.PL b/perl/Makefile.PL index 08afdcb..2c20290 100644 --- a/perl/Makefile.PL +++ b/perl/Makefile.PL @@ -27,6 +27,7 @@ MAKE_FRAG my %pm = ( 'Git.pm' => '$(INST_LIBDIR)/Git.pm', 'Git/I18N.pm' => '$(INST_LIBDIR)/Git/I18N.pm', + 'Git/SVN/Memoize/YAML.pm' => '$(INST_LIBDIR)/Git/SVN/Memoize/YAML.pm', 'Git/SVN/Fetcher.pm' => '$(INST_LIBDIR)/Git/SVN/Fetcher.pm', 'Git/SVN/Editor.pm' => '$(INST_LIBDIR)/Git/SVN/Editor.pm', 'Git/SVN/Prompt.pm' => '$(INST_LIBDIR)/Git/SVN/Prompt.pm', |