From 0cfe37703cf99038b5d83a00f5657a7fafd59de7 Mon Sep 17 00:00:00 2001
From: Ay'yaruq Dotharl <acchan.ff14@gmail.com>
Date: Sun, 26 Nov 2017 02:05:20 +1100
Subject: [PATCH] Update Travis config for hopefully builds

Remove unnecessary dependencies and add a cache for the build files.
Additionally limit Git clone depth and use build matrices properly.
The CMake package dependency was removed since Travis comes with 3.2
and the installer only brings in 3.5, while the current minimum is 2.6.

Add support for mtime_cache, a small Ruby gem for hashing file mtime
and automatically updating unchanged files so that CMake knows which
cached build files are still valid since Git doesn't track mtime.
---
 .gitignore  |  5 ++++-
 .travis.yml | 54 ++++++++++++++++++++++++++++++++++++-----------------
 2 files changed, 41 insertions(+), 18 deletions(-)

diff --git a/.gitignore b/.gitignore
index 97aa43f5..0747ffb3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -106,4 +106,7 @@ src/libraries/external/boost_*
 src/servers/Server_Common/Version\.cpp
 
 # edit and continue files
-/enc_temp_folder
\ No newline at end of file
+/enc_temp_folder
+
+# travis-ci build mtime cache
+.mtime_cache
diff --git a/.travis.yml b/.travis.yml
index 6c5c62cd..21eb7833 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,24 +1,44 @@
+---
 language: c++
-sudo: enabled
-before_install:
-  - sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y
-  - sudo add-apt-repository universe
-  - sudo apt-get update 
-  - sudo apt-get install -y software-properties-common
-  - sudo apt-get update
-  - sudo apt-get install gcc-7 g++-7 gcc-7-multilib g++-7-multilib cmake3 -y
-  - sudo apt-get install libboost-dev libboost-all-dev libmysqlclient-dev -y
-  - sudo apt-get install libmysqlcppconn-dev -y
 
-compiler:
-  - g++
-  
- 
+sudo: enabled
+
+git:
+  depth: 5
+
+matrix:
+  include:
+    - os: linux
+      addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - gcc-7
+            - g++-7
+      env:
+        - MATRIX_EVAL="CC=gcc-7 && CXX=g++-7"
+
+# Setup cache
+cache:
+  directories:
+    - build
+    - .mtime_cache
+
+# Setup build matrix and dependencies
+before_install:
+  - eval "${MATRIX_EVAL}"
+  - gem install --no-ri --no-rdoc mtime_cache
+  - sudo apt-get update
+  - sudo apt-get install -y libboost-dev libboost-all-dev
+  - sudo apt-get install -y libmysqlclient-dev libmysqlcppconn-dev
+
 # Build steps
 script:
-  - g++ --version
-  - mkdir build
+  - $CXX --version
+  - mtime_cache src/**/*.{%{cpp}} -c .mtime_cache/cache.json
+  - mkdir -p build
   - cd build
-  - cmake .. -DSAPPHIRE_BOOST_VER="1.54.0" -DCMAKE_CXX_COMPILER=g++-7 && make -j 3
+  - cmake .. -DSAPPHIRE_BOOST_VER="1.54.0" && make -j 3
   - cd ..
   - bash sql_import.sh