Environment variables not handled in custom scripts

[Vayel]

Issue description

Environment variables are not handled in custom script shortcuts.

Expected result

The environment variable to be replaced by its actual value.

Actual result

The environment variable is treated as a string.

Steps to replicate

[scripts]
echospam = "echo $TEST"

gives

$ TEST=test; pipenv run echospam
$TEST

instead of

$ TEST=test; pipenv run echospam
test

If this is not a bug, it should be mentioned in the documentation (here or here).

---

$ pipenv --support

Pipenv version: '2018.10.13'

Pipenv location: '/home/simudyne/.local/lib/python3.6/site-packages/pipenv'

Python location: '/home/simudyne/anaconda3/bin/python3'

Python installations found:

• 3.6.6: /usr/bin/python3.6
• 3.6.6: /usr/bin/python3.6m
• 2.7.15rc1: /usr/bin/python2.7

PEP 508 Information:

{'implementation_name': 'cpython',
 'implementation_version': '3.6.4',
 'os_name': 'posix',
 'platform_machine': 'x86_64',
 'platform_python_implementation': 'CPython',
 'platform_release': '4.15.0-38-generic',
 'platform_system': 'Linux',
 'platform_version': '#41-Ubuntu SMP Wed Oct 10 10:59:38 UTC 2018',
 'python_full_version': '3.6.4',
 'python_version': '3.6',
 'sys_platform': 'linux'}

System environment variables:

• CLUTTER_IM_MODULE
• SIMUDYNE_PASSWORD
• LS_COLORS
• LESSCLOSE
• XDG_MENU_PREFIX
• LANG
• GDM_LANG
• DISPLAY
• GTK2_MODULES
• COLORTERM
• XDG_VTNR
• SSH_AUTH_SOCK
• MANDATORY_PATH
• XDG_SESSION_ID
• XDG_GREETER_DATA_DIR
• USER
• DESKTOP_SESSION
• QT4_IM_MODULE
• TEXTDOMAINDIR
• GNOME_TERMINAL_SCREEN
• DEFAULTS_PATH
• QT_QPA_PLATFORMTHEME
• PWD
• HOME
• TEXTDOMAIN
• SSH_AGENT_PID
• QT_ACCESSIBILITY
• XDG_SESSION_TYPE
• XDG_DATA_DIRS
• XDG_SESSION_DESKTOP
• GJS_DEBUG_OUTPUT
• GTK_MODULES
• TERM
• SHELL
• VTE_VERSION
• XDG_SEAT_PATH
• QT_IM_MODULE
• XMODIFIERS
• IM_CONFIG_PHASE
• XDG_CURRENT_DESKTOP
• GPG_AGENT_INFO
• GNOME_TERMINAL_SERVICE
• XDG_SEAT
• SHLVL
• LANGUAGE
• GDMSESSION
• GNOME_DESKTOP_SESSION_ID
• LOGNAME
• DBUS_SESSION_BUS_ADDRESS
• XDG_RUNTIME_DIR
• XAUTHORITY
• XDG_SESSION_PATH
• XDG_CONFIG_DIRS
• PATH
• GJS_DEBUG_TOPICS
• SESSION_MANAGER
• SIMUDYNE_USER
• LESSOPEN
• GTK_IM_MODULE
• OLDPWD
• _
• PYTHONDONTWRITEBYTECODE
• PIP_SHIMS_BASE_MODULE
• PIP_PYTHON_PATH

Pipenv–specific environment variables:

Debug–specific environment variables:

• PATH: /home/simudyne/anaconda3/bin:/home/simudyne/bin:/home/simudyne/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
• SHELL: /bin/bash
• LANG: en_GB.UTF-8
• PWD: /tmp

---

Contents of Pipfile ('/tmp/Pipfile'):

[scripts]
echospam = "echo $TEST"