From b0cef1c68042e5cc22977ab8eba80c5863d4478e Mon Sep 17 00:00:00 2001
From: Flamefire <Flamefire@users.noreply.github.com>
Date: Sun, 15 Dec 2019 18:03:27 +0100
Subject: [PATCH] Reduce number of Linux jobs run on PRs

The library is mostly for windows, so there isn't much to test on Linux
Reduce to oldest and most recent compilers
But still test all on pushes to eventually detect compiler version specific issues

Fixes #50
---
 .travis.yml | 83 +++++++++++++++++++++++++++++------------------------
 1 file changed, 46 insertions(+), 37 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 4158b46..f7cfb5b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -21,16 +21,54 @@ jobs:
     - env: BOGUS_JOB=true
 
   include:
-    - compiler: g++
-      env: CXXSTD=03,11
-
-    - compiler: g++-4.4
+    - stage: essential
+      compiler: g++-4.4
       env: CXXSTD=98,0x
       addons:
         apt:
           packages: [g++-4.4]
           sources: [ubuntu-toolchain-r-test]
 
+    - compiler: g++-9
+      env: UBSAN=1 CXXSTD=03,11,14,17,2a UBSAN_OPTIONS=print_stacktrace=1 LINKFLAGS=-fuse-ld=gold
+      addons:
+        apt:
+          packages: [g++-9]
+          sources: [ubuntu-toolchain-r-test]
+
+    - dist: trusty
+      compiler: /usr/bin/clang++
+      env: CXXSTD=03,11
+      addons:
+        apt:
+          packages: [clang-3.3]
+
+    - compiler: clang++-9
+      env: UBSAN=1 CXXSTD=03,11,14,17,2a UBSAN_OPTIONS=print_stacktrace=1 VISIBILITY=global
+      addons:
+        apt:
+          packages: [clang-9]
+          sources:
+            - ubuntu-toolchain-r-test
+            - sourceline: 'deb https://apt.llvm.org/xenial/ llvm-toolchain-xenial-9 main'
+              key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
+
+    - dist: trusty
+      compiler: clang++-libc++
+      env: UBSAN=1 CXXSTD=03,11,14 UBSAN_OPTIONS=print_stacktrace=1
+      addons:
+        apt:
+          packages: [libc++-dev]
+
+    - os: osx
+      compiler: clang++
+      env: UBSAN=1 CXXSTD=03,11,14,1z UBSAN_OPTIONS=print_stacktrace=1
+
+    # Additional compiler versions tested for completenes
+    - stage: additional
+      compiler: g++
+      env: CXXSTD=03,11
+
     - compiler: g++-4.6
       env: CXXSTD=03,0x
       addons:
@@ -94,23 +132,9 @@ jobs:
           packages: [g++-9]
           sources: [ubuntu-toolchain-r-test]
 
-    - compiler: g++-9
-      env: UBSAN=1 CXXSTD=03,11,14,17,2a UBSAN_OPTIONS=print_stacktrace=1 LINKFLAGS=-fuse-ld=gold
-      addons:
-        apt:
-          packages: [g++-9]
-          sources: [ubuntu-toolchain-r-test]
-
     - compiler: clang++
       env: CXXSTD=03,11
 
-    - dist: trusty
-      compiler: /usr/bin/clang++
-      env: CXXSTD=03,11
-      addons:
-        apt:
-          packages: [clang-3.3]
-
     - dist: trusty
       compiler: /usr/bin/clang++
       env: CXXSTD=03,11
@@ -202,35 +226,20 @@ jobs:
             - sourceline: 'deb https://apt.llvm.org/xenial/ llvm-toolchain-xenial-9 main'
               key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
 
-    - compiler: clang++-8
-      env: UBSAN=1 CXXSTD=03,11,14,17,2a UBSAN_OPTIONS=print_stacktrace=1 VISIBILITY=global
-      addons:
-        apt:
-          packages: [clang-8]
-          sources:
-            - ubuntu-toolchain-r-test
-            - llvm-toolchain-xenial-8
-
     - compiler: clang++-libc++
       env: CXXSTD=03,11,14
       addons:
         apt:
           packages: [libc++-dev]
 
-    - dist: trusty
-      compiler: clang++-libc++
-      env: UBSAN=1 CXXSTD=03,11,14 UBSAN_OPTIONS=print_stacktrace=1
-      addons:
-        apt:
-          packages: [libc++-dev]
-
     - os: osx
       compiler: clang++
       env: CXXSTD=03,11,14,1z
 
-    - os: osx
-      compiler: clang++
-      env: UBSAN=1 CXXSTD=03,11,14,1z UBSAN_OPTIONS=print_stacktrace=1
+stages:
+  - essential
+  - name: additional
+    if: type != "pull_request"
 
 install:
   - BOOST_BRANCH=develop && [ "$TRAVIS_BRANCH" == "master" ] && BOOST_BRANCH=master || true