Inject Environment variables into a Jenkins build process with a shell script - bash

Question

The starting situation
I have a Jenkins build Project where I'm doing almost everything by calling my build script (./jenkins.sh). I'm building a Cordova Project, which is dependent on certain versions of Node and Xcode. I'm running the builds on Macs with the latest MacOS Sierra.
So far I'm setting the environment variables in the Jenkins Build with the EnvInject Plugin(https://wiki.jenkins-ci.org/display/JENKINS/EnvInject+Plugin):
The Goal
I want to have the environment variables also set by the build script instead of in the Jenkins Build. This way the environment variables are also in version control and I don't have to touch the Jenkins Build itself.
Basically I need to rebuild the logic of the EnvInject Plugin with bash.
What I've tried #1
Within my jenkins.sh build script I've set the environment variables with export
jenkins.sh:
#!/bin/bash -ve
nodeVersion=7.7.8
xcodeVersion=8.3.1
androidSDKVersion=21.1.2
export DEVELOPER_DIR=/Applications/Xcode_${xcodeVersion}.app/Contents/Developer
export ANDROID_HOME=/Applications/adt/sdk
export PATH=/usr/local/Cellar/node/${nodeVersion}/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/local/bin:/usr/local/bin:/Applications/adt/sdk/tools:/usr/local/bin/:/Applications/adt/sdk/build-tools/${androidSDKVersion}:$PATH
# print info
echo ""
echo "Building with environment Variables"
echo ""
echo " DEVELOPER_DIR: $DEVELOPER_DIR"
echo " ANDROID_HOME: $ANDROID_HOME"
echo " PATH: $PATH"
echo " node: $(node -v)"
echo ""
This yields:
Building with environment Variables
DEVELOPER_DIR: /Applications/Xcode_8.3.1.app/Contents/Developer
ANDROID_HOME: /Applications/adt/sdk
PATH: /usr/local/Cellar/node/7.7.8/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/local/bin:/usr/local/bin:/Applications/adt/sdk/tools:/usr/local/bin/:/Applications/adt/sdk/build-tools/21.1.2:/Users/mles/.fastlane/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/TeX/texbin
node -v
node: v0.10.48
PATH, DEVELOPER_DIR, ANDROID_HOME seems to be set correctly, however it is still using the system version of node v0.10.48 instead of v7.7.8 as set in PATH.
What I've tried #2
I've sourced the variables:
jenkins.sh:
#!/bin/bash -ve
source config.sh
# print info
echo ""
echo "Building with environment Variables"
echo ""
echo " DEVELOPER_DIR: $DEVELOPER_DIR"
echo " ANDROID_HOME: $ANDROID_HOME"
echo " PATH: $PATH"
echo " node: $(node -v)"
echo ""
config.sh
#!/bin/bash -ve
# environment variables
nodeVersion=7.7.8
xcodeVersion=8.3.1
androidSDKVersion=21.1.2
export DEVELOPER_DIR=/Applications/Xcode_${xcodeVersion}.app/Contents/Developer
export ANDROID_HOME=/Applications/adt/sdk
export PATH=/usr/local/Cellar/node/${nodeVersion}/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/local/bin:/usr/local/bin:/Applications/adt/sdk/tools:/usr/local/bin/:/Applications/adt/sdk/build-tools/${androidSDKVersion}:$PATH
The result was the same as in What I've tried #1: Still using system node v0.10.48 instead of node v7.7.8
The question
How can I set the PATH, DEVELOPER_DIR, ANDROID_HOME environment variables properly to be used only within the build script?
#tripleee
Above I'm determining node by calling node: $(node -v). In the build script I'm running gulp which triggers Ionic / Apache Cordova. Do the brackets around node -v start a subshell which has it's own environment variables?
#Jacob
We have used nvm before, but we want to have less dependencies. Using nvm requires to install nvm on all build machines. We have a standard of installing node with brew. That's why I'm using /usr/local/Cellar/node/${nodeVersion} as path to node.
#Christopher Stobie
env:
jenkins#jenkins:~$ env
MANPATH=/Users/jenkins/.nvm/versions/node/v6.4.0/share/man:/usr/local/share/man:/usr/share/man:/Users/jenkins/.rvm/man:/Applications/Xcode_7.2.app/Contents/Developer/usr/share/man:/Applications/Xcode_7.2.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/share/man
rvm_bin_path=/Users/jenkins/.rvm/bin
NVM_CD_FLAGS=
TERM=xterm-256color
SHELL=/bin/bash
TMPDIR=/var/folders/t0/h77w7t2s1fx5mdnsp8b5s6y00000gn/T/
SSH_CLIENT=**.**.*.** ***** **
NVM_PATH=/Users/jenkins/.nvm/versions/node/v6.4.0/lib/node
SSH_TTY=/dev/ttys000
LC_ALL=en_US.UTF-8
NVM_DIR=/Users/jenkins/.nvm
rvm_stored_umask=0022
USER=jenkins
_system_type=Darwin
rvm_path=/Users/jenkins/.rvm
rvm_prefix=/Users/jenkins
MAIL=/var/mail/jenkins
PATH=/Users/jenkins/.nvm/versions/node/v6.4.0/bin:/Users/jenkins/.fastlane/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/jenkins/.rvm/bin:/Users/jenkins/tools/oclint/bin:/Applications/adt/sdk/tools:/Applications/adt/sdk/platform-tools:/Applications/adt/sdk/build-tools/android-4.4:/Users/jenkins/.rvm/bin
NVM_NODEJS_ORG_MIRROR=https://nodejs.org/dist
rvm_loaded_flag=1
PWD=/Users/jenkins
LANG=en_US.UTF-8
_system_arch=x86_64
_system_version=10.12
rvm_version=1.26.10 (latest)
SHLVL=1
HOME=/Users/jenkins
LS_OPTIONS=--human --color=always
LOGNAME=jenkins
SSH_CONNECTION=**.**.*.** ***** **.**.*.** **
NVM_BIN=/Users/jenkins/.nvm/versions/node/v6.4.0/bin
NVM_IOJS_ORG_MIRROR=https://iojs.org/dist
rvm_user_install_flag=1
_system_name=OSX
_=/usr/bin/env
alias:
jenkins#jenkins:~$ alias
alias l='ls -lAh'
alias rvm-restart='rvm_reload_flag=1 source '\''/Users/jenkins/.rvm/scripts/rvm'\'''

Answer 1

This doesnt look like an environment variable issue. It looks like a permissions issue. The user executing the script is either:
not able to read the /usr/local/Cellar/node/7.7.8/bin directory, or
not able to read the node executable from that directory, or
not able to execute the node executable from that directory
In order to test, become that user on the machine and execute the node command against the full path:
/usr/local/Cellar/node/7.7.8/bin/node -v
or, if you need to, change the script to avoid using PATH lookups (Im suggesting this for diagnosis only, not as a solution):
echo " node: $(/usr/local/Cellar/node/7.7.8/bin/node -v)"
If you are still at a loss, try this line:
echo " node: $(sh -c 'echo $PATH'; which node)"