X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;ds=sidebyside;f=Debian%2FDgit.pm;h=27fd29ab6fefa21ab0ae991fe1661fbc0c0ddfd3;hb=d69f00cafcb1a8ab3ec1c75a4a35b0db496a60ad;hp=be8cbeea2a8667a69e6f0c54a4b9bacc2ffad94a;hpb=68d88a087c25d9e1cee7106938ab4e9751cfa146;p=dgit.git diff --git a/Debian/Dgit.pm b/Debian/Dgit.pm index be8cbeea..27fd29ab 100644 --- a/Debian/Dgit.pm +++ b/Debian/Dgit.pm @@ -29,6 +29,8 @@ use Config; use Digest::SHA; use Data::Dumper; use IPC::Open2; +use File::Path; +use File::Basename; BEGIN { use Exporter (); @@ -36,29 +38,35 @@ BEGIN { $VERSION = 1.00; @ISA = qw(Exporter); - @EXPORT = qw(setup_sigwarn + @EXPORT = qw(setup_sigwarn forkcheck_setup forkcheck_mainprocess dep14_version_mangle debiantags debiantag_old debiantag_new server_branch server_ref stat_exists link_ltarget hashfile - fail ensuredir executable_on_path + fail ensuredir must_getcwd executable_on_path waitstatusmsg failedcmd_waitstatus failedcmd_report_cmd failedcmd - cmdoutput cmdoutput_errok + runcmd cmdoutput cmdoutput_errok git_rev_parse git_cat_file git_get_ref git_for_each_ref git_for_each_tag_referring is_fast_fwd $package_re $component_re $deliberately_re - $distro_re $versiontag_re + $distro_re $versiontag_re $series_filename_re $branchprefix initdebug enabledebug enabledebuglevel printdebug debugcmd $debugprefix *debuglevel *DEBUG - shellquote printcmd messagequote); + shellquote printcmd messagequote + $negate_harmful_gitattrs + changedir git_slurp_config_src + playtree_setup); # implicitly uses $main::us - %EXPORT_TAGS = ( policyflags => [qw(NOFFCHECK FRESHREPO NOCOMMITCHECK)] ); - @EXPORT_OK = @{ $EXPORT_TAGS{policyflags} }; + %EXPORT_TAGS = ( policyflags => [qw(NOFFCHECK FRESHREPO NOCOMMITCHECK)], + playground => [qw(record_maindir $maindir $local_git_cfg + fresh_playground $playground)]); + @EXPORT_OK = ( @{ $EXPORT_TAGS{policyflags} }, + @{ $EXPORT_TAGS{playground} } ); } our @EXPORT_OK; @@ -69,6 +77,7 @@ our $deliberately_re = "(?:TEST-)?$package_re"; our $distro_re = $component_re; our $versiontag_re = qr{[-+.\%_0-9a-zA-Z/]+}; our $branchprefix = 'dgit'; +our $series_filename_re = qr{(?:^|\.)series(?!\n)$}s; # policy hook exit status bits # see dgit-repos-server head comment for documentation @@ -81,10 +90,23 @@ sub NOCOMMITCHECK () { return 0x8; } our $debugprefix; our $debuglevel = 0; +our $negate_harmful_gitattrs = "-text -eol -crlf -ident -filter"; + +our $forkcheck_mainprocess; + +sub forkcheck_setup () { + $forkcheck_mainprocess = $$; +} + +sub forkcheck_mainprocess () { + # You must have called forkcheck_setup or setup_sigwarn already + getppid != $forkcheck_mainprocess; +} + sub setup_sigwarn () { - our $sigwarn_mainprocess = $$; + forkcheck_setup(); $SIG{__WARN__} = sub { - die $_[0] unless getppid == $sigwarn_mainprocess; + die $_[0] if forkcheck_mainprocess; }; } @@ -126,6 +148,7 @@ sub messagequote ($) { sub shellquote { my @out; local $_; + defined or confess 'internal error' foreach @_; foreach my $a (@_) { $_ = $a; if (!length || m{[^-=_./:0-9a-z]}i) { @@ -203,6 +226,12 @@ sub ensuredir ($) { die "mkdir $dir: $!"; } +sub must_getcwd () { + my $d = getcwd(); + defined $d or fail "getcwd failed: $!"; + return $d; +} + sub executable_on_path ($) { my ($program) = @_; return 1 if $program =~ m{/}; @@ -263,6 +292,12 @@ sub failedcmd { fail failedcmd_waitstatus(); } +sub runcmd { + debugcmd "+",@_; + $!=0; $?=-1; + failedcmd @_ if system @_; +} + sub cmdoutput_errok { confess Dumper(\@_)." ?" if grep { !defined } @_; debugcmd "|",@_; @@ -393,4 +428,126 @@ sub is_fast_fwd ($$) { } } +sub changedir ($) { + my ($newdir) = @_; + printdebug "CD $newdir\n"; + chdir $newdir or confess "chdir: $newdir: $!"; +} + +sub git_slurp_config_src ($) { + my ($src) = @_; + # returns $r such that $r->{KEY}[] = VALUE + my @cmd = (qw(git config -z --get-regexp), "--$src", qw(.*)); + debugcmd "|",@cmd; + + local ($debuglevel) = $debuglevel-2; + local $/="\0"; + + my $r = { }; + open GITS, "-|", @cmd or die $!; + while () { + chomp or die; + printdebug "=> ", (messagequote $_), "\n"; + m/\n/ or die "$_ ?"; + push @{ $r->{$`} }, $'; #'; + } + $!=0; $?=0; + close GITS + or ($!==0 && $?==256) + or failedcmd @cmd; + return $r; +} + +# ========== playground handling ========== + +# terminology: +# +# $maindir user's git working tree +# $playground area in .git/ where we can make files, unpack, etc. etc. +# playtree git working tree sharing object store with the user's +# inside playground, or identical to it +# +# other globals +# +# $local_git_cfg hash of arrays of values: git config from $maindir +# +# expected calling pattern +# +# firstly +# +# [record_maindir] +# must be run in directory containing .git +# assigns to $maindir if not already set +# also calls git_slurp_config_src to record git config +# in $local_git_cfg, unless it's already set +# +# fresh_playground SUBDIR_PATH_COMPONENTS +# e.g fresh_playground 'dgit/unpack' ('.git/' is implied) +# default SUBDIR_PATH_COMPONENTS is $playground_subdir +# calls record_maindir +# sets up a new playground (destroying any old one) +# assigns to $playground and returns the same pathname +# caller may call multiple times with different subdir paths +# createing different playgrounds; but $playground global can +# refer only to one, obv. +# +# then can use +# +# changedir $playground +# changedir $maindir +# +# playtree_setup $local_git_cfg +# # ^ call in some (perhaps trivial) subdir of $playground +# +# rmtree $playground + +# ----- maindir ----- + +our $maindir; +our $local_git_cfg; + +sub record_maindir () { + $maindir //= must_getcwd(); + $local_git_cfg //= git_slurp_config_src 'local'; +} + +# ----- playgrounds ----- + +our $playground; + +sub fresh_playground ($) { + my ($spc) = @_; + record_maindir(); + $spc = ".git/$spc"; + my $parent = dirname $spc; + mkdir $parent or $!==EEXIST or fail "failed to mkdir $parent: $!"; + rmtree $spc; + mkdir $spc or die "$spc $!"; + return $playground = "$maindir/$spc"; +} + +# ----- playtrees ----- + +sub playtree_setup (;$) { + my ($t_local_git_cfg) = @_; + $t_local_git_cfg //= $local_git_cfg; + # should be run in a directory .git/FOO/BAR of a working tree + runcmd qw(git init -q); + runcmd qw(git config gc.auto 0); + foreach my $copy (qw(user.email user.name user.useConfigOnly + core.sharedRepository + core.compression core.looseCompression + core.bigFileThreshold core.fsyncObjectFiles)) { + my $v = $t_local_git_cfg->{$copy}; + next unless $v; + runcmd qw(git config), $copy, $_ foreach @$v; + } + rmtree('.git/objects'); + symlink '../../../../objects','.git/objects' or die $!; + ensuredir '.git/info'; + open GA, "> .git/info/attributes" or die $!; + print GA "* $negate_harmful_gitattrs\n" or die $!; + close GA or die $!; +} + 1;