Update git tasks, vars, task descriptions + README

Don't use depth: 1 or ignore_errors in git tasks.
Commit history is nice, and since you can't do most things without the
repositories, we should fail closed upon errors.
Creates variable for 'gitian_builder_url', so we can switch out @ageis's fork
with the official @devrandom repo once a pending pull request is merged.
Changes default zcash_version to 'master' in defaults/main.yml.

README.md

@@ -56,7 +56,7 @@ Building Zcash
     vagrant ssh zcash-build
     ./gitian-build.sh
 
-The output from `gbuild` is informative. There are some common warnings which can be ignored, e.g. if you get a privileges error related to LXC then just execute the script again. The most important thing is that one reaches the step which says `Running build script (log in var/build.log)`. If not, then something else is wrong and you should let us know.
+The output from `gbuild` is informative. There are some common warnings which can be ignored, e.g. if you get an intermittent privileges error related to LXC then just execute the script again. The most important thing is that one reaches the step which says `Running build script (log in var/build.log)`. If not, then something else is wrong and you should let us know.
 
 Take a look at the variables near the top of `~/gitian-build.sh` and get familiar with its functioning, as it can handle most tasks.
 

roles/gitian/defaults/main.yml

@@ -3,8 +3,9 @@ gitian_user: vagrant
 download_directory: /tmp/gitian
 vm_builder_name: 'vm-builder-0.12.4+bzr494'
 vm_builder_url: 'http://archive.ubuntu.com/ubuntu/pool/universe/v/vm-builder/vm-builder_0.12.4+bzr494.orig.tar.gz'
+gitian_builder_url: https://github.com/ageis/gitian-builder
 zcash_git_repo_url: https://github.com/zcash/zcash
 zcash_gitian_sigs_repo: https://github.com/zcash/gitian.sigs
-zcash_version: v1.0.0-beta2
+zcash_version: master
 gitian_host_ip: 10.0.2.15
 lxc_guest_ip: 10.0.3.5

roles/gitian/tasks/main.yml

@@ -10,7 +10,7 @@
       - "git_email != ''"
     msg: Please set your gpg_key_name, git_name and git_email in gitian.yml.
 
-- name: Install Gitian build dependencies.
+- name: Install Gitian dependencies.
   apt:
     name: "{{ item }}"
     state: present
@@ -122,12 +122,10 @@
 
 - name: Clone git repository for Gitian builder.
   git:
-    repo: "https://github.com/ageis/gitian-builder"
+    repo: "{{ gitian_builder_url }}"
     dest: "/home/{{ gitian_user }}/gitian-builder"
     version: "master"
     force: yes
-    depth: 1
-  ignore_errors: yes
   become_user: "{{ gitian_user }}"
 
 - name: Clone git repository for Zcash.
@@ -136,8 +134,6 @@
     dest: "/home/{{ gitian_user }}/zcash"
     version: "{{ zcash_version }}"
     force: yes
-    depth: 1
-  ignore_errors: yes
   become_user: "{{ gitian_user }}"
 
 - name: Clone git repository for Gitian signatures.
@@ -146,8 +142,6 @@
     dest: "/home/{{ gitian_user }}/gitian.sigs"
     version: master
     force: yes
-    depth: 1
-  ignore_errors: yes
   become_user: "{{ gitian_user }}"
 
 - name: Reboot.
@@ -170,7 +164,7 @@
     state=started
   become: no
 
-- name: Wait extra time for server to come back up.
+- name: Wait extra time for VM to come back up.
   pause:
     seconds: 10
 
@@ -220,4 +214,4 @@
     msg: >-
       Finished bootstrapping the Gitian host VM!
       To enter the environment, run `vagrant ssh zcash-build`
-      And then use `./gitian-build.sh` to kick off a build.
+      and then use `./gitian-build.sh` to kick off a build.