pshell 1.0.17

Works out if this is running from inside a shell, and if so, which one.
Documentation 
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---
name: CI Build

on:
  push:
    branches:
      - '**'
    paths:
      - '**/*.rs'
      - 'src/*'
      - 'Cargo.*'
      - '.github/workflows/build.yml'
  pull_request:
    branches:
      - main
    paths:
      - '**/*.rs'
      - 'src/*'
      - 'Cargo.*'
      - '.github/workflows/build.yml'
  schedule:
    - cron: '0 0 * * 1'
  workflow_dispatch:

env:
  RUSTFLAGS: '--deny warnings'

jobs:
  build:
    name: CI Build
    runs-on: ubuntu-latest
    strategy:
      matrix:
        rust: [stable]
        TARGET:
          - x86_64-unknown-linux-gnu

    steps:
      - name: Checkout
        uses: actions/checkout@v4
      
      - name: Toolchain setup
        uses: dtolnay/rust-toolchain@master
        with:
          toolchain: ${{ matrix.rust }}
          target: ${{ matrix.TARGET }}

      - name: Build
        run: cargo build