Defining the build matrix only with matrix.include leads to an additional, unwanted job

[bilderbuchi]

Simple reproduction of the problem: A .travis.yml, makes two builds, one without environment variables defined. One build only, with TARGET=linux is desired:

language: c++
compiler: gcc
matrix:
  include:
    - os: linux
      env: TARGET="linux"

install: true

script: true

leads to

    15.1 Compiler: gcc  no environment variables set
    15.2 Compiler: gcc  TARGET="linux"

https://travis-ci.org/bilderbuchi/travis_production_test/builds/76336816

Related issue: #1228

[BanzaiMan]

For now, you can exclude the default job:

language: c++
compiler: gcc
matrix:
  include:
    - os: linux
      env: TARGET="linux"
  exclude:
    - compiler: gcc

[bilderbuchi]

Ah, nice workaround, thanks!

[o11c]

I think this works if you omit the top-level compiler: gcc line.

[ldionne]

The proposed workaround is very annoying, because some of us might actually need the global compiler: gcc (or in my case compiler: clang). The other option is to end up with compiler: gcc globally and then to redefine compiler: clang for each job inside matrix.include, but when you have 20+ jobs, that makes a lot of repetition. I beg you for a clean fix.