[tor-dev] Merge of Gitian PT build with 3.0-rc-1; next steps

[David Fifield <david@xxxxxxxxxxxxxxx>]

I recently merged the Gitian-based pluggable transports bundle build
with tag tbb-3.0rc1-build1, with suprisingly little difficulty. I'd like
you to take a look at what the pt branch is doing and help me decide
what to do next.

Some background: The ticket for building the PT bundles is
	https://trac.torproject.org/projects/tor/ticket/9444
The pt branch is at
	https://gitweb.torproject.org/user/dcf/tor-browser-bundle.git/shortlog/refs/heads/pt
To see what's different in the pt branch with respect to master, in an
existing tor-browser-bundle.git checkout, do this:
	git remote add dcf https://git.torproject.org/user/dcf/tor-browser-bundle.git
	git fetch dcf
Then, for example,
	git diff master...dcf/pt --stat
	git diff master...dcf/pt
	gitk master dcf/pt

A recent build of 00789049873753d931fec3803c9ccae75a5c5267 is here, also
containing the full complement of usual build outputs.
	https://people.torproject.org/~dcf/pt-bundle/3.0-rc-1-pt20131207-1/
These bundles are up to date and seem to be working well. I would be
comfortable shipping them to users.

I'd like your advice on how to make the pluggable transports browser
part of the usual build. The diff between descriptors gitian-bundle.yml
and gitian-ptbundle.yml is small; in fact I can paste it here:

--- descriptors/linux/gitian-bundle.yml 2013-12-06 19:38:40.000000000 -0800
+++ descriptors/linux/gitian-ptbundle.yml       2013-12-06 19:38:40.000000000 -0800
@@ -1,3 +1,3 @@
 ---
-name: "bundle-linux"
+name: "ptbundle-linux"
 suites:
@@ -29,2 +29,4 @@
 - "tor-linux64-gbuilt.zip"
+- "pluggable-transports-linux32-gbuilt.zip"
+- "pluggable-transports-linux64-gbuilt.zip"
 - "relativelink-src.zip"
@@ -39,2 +41,4 @@
 - "tbb-docs.zip"
+- "pttbb-docs.zip"
+- "linux-pt-torrc"
 script: |
@@ -98,4 +102,8 @@
   unzip ~/build/tor-linux$GBUILD_BITS-gbuilt.zip
+  unzip ~/build/pluggable-transports-linux$GBUILD_BITS-gbuilt.zip
   unzip ~/build/linux-skeleton.zip
   unzip ~/build/tbb-docs.zip
+  mkdir -p Docs/PluggableTransports
+  unzip -d Docs/PluggableTransports ~/build/pttbb-docs.zip
+  cat ~/build/linux-pt-torrc >> Data/Tor/torrc-defaults
   chmod 700 Data/Browser
@@ -122,3 +130,3 @@
   #mv tor-browser.exe $OUTDIR/tor-browser-linux${GBUILD_BITS}_en-US.7z-selfextract
-  ~/build/dtar.sh $OUTDIR/tor-browser-linux${GBUILD_BITS}-${TORBROWSER_VERSION}_en-US.tar.xz tor-browser_en-US
+  ~/build/dtar.sh $OUTDIR/tor-pluggable-transports-browser-linux${GBUILD_BITS}-${TORBROWSER_VERSION}_en-US.tar.xz tor-browser_en-US
   rm -rf tor-browser_en-US
@@ -149,3 +157,3 @@
     #mv tor-browser.exe $OUTDIR/tor-browser-linux${GBUILD_BITS}_$LANG.7z-selfextract
-    ~/build/dtar.sh $OUTDIR/tor-browser-linux${GBUILD_BITS}-${TORBROWSER_VERSION}_$LANG.tar.xz tor-browser_$LANG
+    ~/build/dtar.sh $OUTDIR/tor-pluggable-transports-browser-linux${GBUILD_BITS}-${TORBROWSER_VERSION}_$LANG.tar.xz tor-browser_$LANG

I see a couple of options for getting rid of gitian-ptbundle.yml:
  1. Add a conditional variable, something like the
     '[ ${TORBROWSER_VERSION::3} != "3.0" ]' in linux/gitian-firefox.yml,
     that controls whether a vanilla or a PT build is underway. When the
     variable is set, it would just do the few small changes in the diff
     above.
  2. Build the pluggable transports bundles unconditionally, and just do
     all the dtars in gitian-bundle.yml twice: once for tor-browser and
     once for tor-pluggable-transports-browser.

Either option, I think, puts us in a good place to step to a unified
bundle in the future. What do you think?

David Fifield
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