Add Zsh support

[gamesh411]

Implement the necessary hook for Zsh shell support. Fixes #7.

[martong]

👍 for extending zsh

[whisperity]

Hmm... something is wonky here.

I installed zsh in a Docker for testing:

94b373fb3634# zsh --version
zsh 5.4.2 (x86_64-ubuntu-linux-gnu)

Envprobe in itself works (after installing Python, of course), as in the configuration tool and such works, and the control file is emitted, however this line in particular which I understand should make the shell run the hook is not executed automatically.

root@94b373fb3634:~# zsh
Envprobe loaded successfully. :)
94b373fb3634# ep %
94b373fb3634# ep SOME_VAR=Value
94b373fb3634# echo $SOME_VAR

94b373fb3634# ep +PATH /Envprobe
94b373fb3634# which envprobe.py
envprobe.py not found
94b373fb3634# cat /tmp/.envprobe.$$-*/control.sh

export SOME_VAR=Value;

export PATH=/Envprobe:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin;
94b373fb3634# echo $PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
94b373fb3634# echo -e "This isn't working??\n\n"
This isn't working??


94b373fb3634# __envprobe
94b373fb3634# ep %
! Modified: PATH
      added /Envprobe

+ Added:    SOME_VAR
     value: Value

94b373fb3634# which envprobe.py
/Envprobe/envprobe.py

Is there something extra that needs to be installed, or added to .zshrc, e.g. some configuration toggle that allows such hook commands to be run?

My test install ran in a docker with the following directives, so it's as plain as possible.

FROM ubuntu:18.04
RUN apt-get update && apt-get install --no-install-recommends git python3 zsh

RUN cd / && git clone http://github.com/gamesh411/envprobe.git Envprobe && cd Envprobe && git checkout zsh-support

COPY zshrc /root/.zshrc  # Copy the ZSHRC contents in the README.

[whisperity]

@martong

+1 for extending zsh

Did you try @gamesh411's on a live (or test) environment? I wish to know if only I'm messing something up, or the patch is fishy...

[gamesh411]

I have tested this updated solution with zshusers/zsh docker container image, which contains stock zsh (without oh-my-zsh), and I have also tested it with my environment (which does contain oh-my-zsh).

[gamesh411]

I have also reproduced the feasibility of the solution using this configuration:
Dockerfile:

FROM ubuntu:18.04

RUN apt-get update && \
    apt-get install --no-install-recommends --assume-yes \
      ca-certificates \
      git \
      python3 \
      zsh && \
    rm -rf /var/lib/apt/lists/*

RUN cd /root && \
    git clone https://github.com/gamesh411/envprobe.git envprobe && \
    cd envprobe && \
    git checkout zsh-support && \
    rm -r .git

COPY zshrc /root/.zshrc

zshrc:

unset  ENVPROBE_CONFIG
export ENVPROBE_LOCATION=~/envprobe
export ENVPROBE_SHELL_PID=$$
eval   "$(${ENVPROBE_LOCATION}/envprobe-config.py shell zsh)"
alias  ep='envprobe'
alias  epc='envprobe-config'

[whisperity]

Thank you @gamesh411 it worked now on a clean install too. 😋