Add WebTunnel project

projects/webtunnel/build

+#!/bin/bash
+[% c("var/set_default_env") -%]
+[% pc('go', 'var/setup', { go_tarfile => c('input_files_by_name/go') }) %]
+distdir=/var/tmp/dist/[% project %]
+mkdir -p $distdir
+
+[% IF c("var/android") -%]
+  [% pc(c('var/compiler'), 'var/setup', { compiler_tarfile => c('input_files_by_name/' _ c('var/compiler')) }) %]
+  # We need to explicitly set CGO_ENABLED with Go 1.13.x as the Android build
+  # breaks otherwise.
+  export CGO_ENABLED=1
+[% END -%]
+
+tar -C /var/tmp/dist -xf [% c('input_files_by_name/goptlib') %]
+
+mkdir -p /var/tmp/build
+tar -C /var/tmp/build -xf [% project %]-[% c('version') %].tar.gz
+cd /var/tmp/build/[% project %]-[% c('version') %]
+
+mkdir -p "$GOPATH/src/gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/webtunnel.git"
+ln -sf "$PWD" "$GOPATH/src/gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/webtunnel"
+
+cd main/client
+go build -ldflags '-s'
+cp -a client[% IF c("var/windows") %].exe[% END %] $distdir/webtunnel-client[% IF c("var/windows") %].exe[% END %]
+
+cd /var/tmp/build/[% project %]-[% c('version') %]
+cp -a README.md $distdir/README.WEBTUNNEL.md
+
+cd $distdir
+[% c('tar', {
+        tar_src => [ '.' ],
+        tar_args => '-czf ' _ dest_dir _ '/' _ c('filename'),
+    }) %]

projects/webtunnel/config

+# vim: filetype=yaml sw=2
+version: '[% c("abbrev") %]'
+git_url: https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/webtunnel.git
+git_hash: 2ecf64381bad8a5db45c5871dcad7d12831dca69
+filename: '[% project %]-[% c("version") %]-[% c("var/osname") %]-[% c("var/build_id") %].tar.gz'
+container:
+  use_container: 1
+
+input_files:
+  - project: container-image
+  - name: go
+    project: go
+  - name: goptlib
+    project: goptlib
+  - name: '[% c("var/compiler") %]'
+    project: '[% c("var/compiler") %]'
+    enable: '[% c("var/android") %]'