add ability to compile from source (#14)

README.md

@@ -30,7 +30,10 @@ All variables which can be overridden are stored in [defaults/main.yml](defaults
 
 | Name           | Default Value | Description                        |
 | -------------- | ------------- | -----------------------------------|
-| `besu_version` | ___unset___ |  __REQUIRED__ Version of Besu to install and run. All available versions are listed on our Besu [solutions](https://pegasys.tech/solutions/hyperledger-besu/) page |
+| `besu_build_from_source` | ___unset___ |  When set to `true`, Besu is build from git sources. See also `besu_git_repo` and `besu_git_commit` |
+| `besu_version` | ___unset___ |  __REQUIRED__ if `besu_build_from_source` is false. Version of Besu to install and run. All available versions are listed on our Besu [solutions](https://pegasys.tech/solutions/hyperledger-besu/) page |
+| `besu_git_repo` | https://github.com/hyperledger/besu.git | The URL to use when cloning besu sources. Only necessary when `besu_build_from_source` is `true`. |
+| `besu_git_commit` | master | The git commit to use when building Besu from source. Can be a branchname, commit hash, or anything that's legal to be used as an argument to `git checkout`. Only used if `besu_build_from_source` is `true`. |
 | `besu_user` | besu | Besu user |
 | `besu_group` | besu | Besu group |
 | `besu_download_url` | https://bintray.com/hyperledger-org/besu-repo/download_file?file_path=besu-{{ besu_version }}.tar.gz | The download tar.gz file used. You can use this if you need to retrieve besu from a custom location such as an internal repository. |

defaults/main.yml

@@ -7,6 +7,11 @@ besu_group: "{{ besu_user }}"
 # Version to install
 besu_download_url: "https://bintray.com/hyperledger-org/besu-repo/download_file?file_path=besu-{{ besu_version }}.tar.gz"
 
+# Building from source
+besu_build_from_source: false
+besu_git_repo: "https://github.com/hyperledger/besu.git"
+besu_git_commit: "master"
+
 # Directory paths
 besu_base_dir: "/opt/besu"
 besu_install_dir: "{{ besu_base_dir }}/besu-{{ besu_version }}"

tasks/compile.yml

@@ -0,0 +1,39 @@
+---
+
+- name: Ensure we have sane configuration
+  fail:
+    msg: You must set "besu_git_repo" for this role to run when "besu_build_from_source" is enabled
+  when: not (besu_git_repo is defined) or besu_git_repo|length == 0
+
+- name: Check JDK version
+  shell: javac -version | egrep -o '[0-9]+\.[0-9]+\.[0-9]+'
+  register: jdk_version
+  ignore_errors: true
+
+- name: Ensure JDK is installed
+  fail:
+    msg: "You must have JDK 11 or later installed. {{ 'No version found.' if jdk_version is failed else 'Found version ' + jdk_version.stdout }}"
+  when: jdk_version.stdout is version('11.0.0', '<') 
+
+- name: Clone Besu Sources
+  git:
+    repo: "{{ besu_git_repo }}"
+    dest: '/tmp/besu'
+    version: "{{ besu_git_commit }}"
+
+- name: Build Besu
+  shell: ./gradlew --no-daemon --parallel clean assemble
+  args:
+    chdir: /tmp/besu
+
+- name: Get Besu Version
+  shell: "awk '/version=/ { gsub(/version=/,\"\"); print $1 }' gradle.properties"
+  args:
+    chdir: /tmp/besu
+  register: besu_version_cmd
+
+- name: Set Besu Version Fact
+  set_fact:
+    besu_version: "{{ besu_version_cmd.stdout }}"
+
+

tasks/install.yml

@@ -44,8 +44,8 @@
 
 - name: Extract Besu source to install directory
   unarchive:
-    src: "{{ besu_download_url }}"
-    remote_src: true
+    src: "{{ '/tmp/besu/build/distributions/besu-' + besu_version + '.tar.gz' if besu_build_from_source else besu_download_url }}"
+    remote_src: "{{ false if besu_build_from_source else true }}"
     dest: "{{ besu_install_dir }}"
     owner: "{{ besu_user }}"
     group: "{{ besu_group }}"

tasks/main.yml

@@ -2,8 +2,11 @@
 - name: Ensure we have sane configuration
   block:
     - fail:
-        msg: You must set "besu_version" for this role to run
-      when: besu_version is not defined
+        msg: You must set "besu_version" for this role to run when not building Besu from source
+      when: besu_version is not defined and not besu_build_from_source
+    - fail:
+        msg: The vars "besu_version" and "besu_build_from_source" are incompatible. If trying to build a specific git refspec, use "besu_git_refspec" instead of besu_version.
+      when: besu_version is defined and besu_build_from_source
     - fail:
         msg: Orion and Fast-Sync are incompatible
       when: orion_version is defined and besu_sync_mode == "FAST"
@@ -16,6 +19,10 @@
         - "{{ ansible_os_family|lower }}.yml"
       skip: true
 
+- name: Compile besu
+  include_tasks: "compile.yml"
+  when: besu_build_from_source
+
 - name: Install besu
   include_tasks: "install.yml"