Allow downloading of database tree source code via dictup CGI scripts

[ypp-sc-tools.db-live.git] / yarrg / Commods.pm

diff --git a/yarrg/Commods.pm b/yarrg/Commods.pm
index 372fe16f51544081e9378d68563a91a5b38868df..24f2e81ae9eedb49353a925f4a2a06d2aeb1b200 100644 (file)
--- a/yarrg/Commods.pm
+++ b/yarrg/Commods.pm
@@ -22,6 +22,7 @@
 
 package Commods;
 use IO::File;
+use IO::Pipe;
 use HTTP::Request::Common ();
 use POSIX;
 use LWP::UserAgent;
@@ -45,13 +46,40 @@ BEGIN {
                      &pipethrough_run_gzip &http_useragent &version_core
                      &http_useragent_string_map
                      &cgipostform &yarrgpostform &cgi_get_caller
-                     &set_ctype_utf8 $masterinfoversion);
+                     &set_ctype_utf8 $masterinfoversion
+                     &source_tarball);
     %EXPORT_TAGS = ( );
 
     @EXPORT_OK   = qw();
 }
 
-our $masterinfoversion= 2; # version we understand
+our $masterinfoversion= 2; # version we understand.
+#
+# To extend the source-info.txt format:
+#
+#    * Commods.pm:parse_info1
+#       add code to parse new version
+#
+#    * source-info.txt
+#       add new information
+#
+# If new data should NOT be in master-info.txt too:
+#
+#    * update-master-info:process_some_info
+#       check that code for converting source-info to master-info
+#       removes the extra info; add code to remove it if necessary
+#
+#    * db-idempotent-populate
+#       if database schema is extended, add code to copy data
+#
+# If new data DOES need to be in master-info.txt too:
+#
+#    * Commods.pm:$masterinfoversion
+#       increment
+#
+#    * update-master-info:process_some_info
+#       add code to convert new version to old, by removing
+#       extra info conditionally depending on version
 
 our %oceans; # eg $oceans{'Midnight'}{'Ruby'}{'Eta Island'}= $sources;
 our %clients; # eg $clients{'ypp-sc-tools'}= [ qw(last-page) ];
@@ -409,4 +437,38 @@ sub http_useragent ($) {
     return $ua;
 }
 
+sub source_tarball ($$) {
+    my ($sourcebasedir,$spitoutfn) = @_;
+
+    my $pipe= new IO::Pipe or die $!;
+    my $pid= fork();  defined $pid or die $!;
+    if (!$pid) {
+       $ENV{'YPPSC_YARRG_SRCBASE'}= $sourcebasedir;
+       $pipe->writer();
+       exec '/bin/sh','-c','
+               cd -P "$YPPSC_YARRG_SRCBASE"
+               (
+                git-ls-files -z;
+                git-ls-files -z --others --exclude-from=.gitignore;
+                if test -d .git; then find .git -print0; fi
+               ) | (
+                cpio -Hustar -o --quiet -0 -R 1000:1000 || \
+                cpio -Hustar -o --quiet -0
+               ) | gzip
+       ';
+       die $!;
+    }
+    $pipe->reader();
+
+    my ($d, $l);
+    while ($l= read $pipe, $d, 65536) {
+       $spitoutfn->($d);
+    }
+    waitpid $pid,0;
+    defined $l or die "read pipe $!";
+    $pipe->error and die "pipe error $!";
+    close $pipe;
+    # deliberately ignore errors
+}
+
 1;