check POSIX mode more thoroughly (#724)

Author: mxcl

.github/workflows/ci.shellcode.yml

@@ -40,7 +40,7 @@ jobs:
 
       - name: prep
         run: |
-            apt-get update && apt-get --yes install unzip bash libatomic1
+            apt-get update && apt-get --yes install bash libatomic1
             chmod u+x /usr/local/bin/tea
 
       - run: |
@@ -107,6 +107,13 @@ jobs:
           eval "$(tea --shellcode)"
           test $(foo) = hi
 
+      - name: POSIXLY_CORRECT
+        run: |
+          eval "$(tea --shellcode)"
+          tea +duf
+          duf --version
+        shell: bash -eo posix {0}
+
   zsh:
     needs: compile
     runs-on: ubuntu-latest
@@ -122,7 +129,7 @@ jobs:
 
       - name: prep
         run: |
-          apt-get update && apt-get --yes install unzip zsh libatomic1
+          apt-get update && apt-get --yes install zsh libatomic1
           chmod u+x /usr/local/bin/tea
         shell: sh  # ∵ cannot be zsh until zsh is installed
 
@@ -205,6 +212,13 @@ jobs:
           eval "$(tea --shellcode)"
           test $(foo) = hi
 
+      - name: emulate -L sh
+        run: |
+          emulate -L sh
+          eval "$(tea --shellcode)"
+          tea +duf
+          duf --version
+
   POSIX:
     needs: compile
     runs-on: ubuntu-latest
@@ -217,7 +231,7 @@ jobs:
 
       - name: prep
         run: |
-          apt-get update && apt-get --yes install unzip libatomic1
+          apt-get update && apt-get --yes install libatomic1
           chmod u+x /usr/local/bin/tea
 
       # NOTE matrix does not work for the shell key :-/
@@ -247,6 +261,15 @@ jobs:
             exit 3
           fi
 
+      # verifies our assumption that we are running in “POSIX mode”
+      - name: tea@latest fails
+        run: |
+          eval "$(tea --shellcode)"
+
+          if tea@latest --version; then
+            exit 1
+          fi
+
       - name: test `dev` shellcode
         run: |
           eval "$(tea --shellcode)"

docs/run/anywhere/terminals.md

@@ -1,6 +1,6 @@
 # Getting Started
 
-Installing with `brew` is most straight forward:
+Installing with [`brew`] is most straight forward:
 
 ```sh
 brew install teaxyz/pkgs/tea-cli
@@ -19,7 +19,7 @@ brew install teaxyz/pkgs/tea-cli
     
 
    {% hint style='info' %}
-   Wanna read that script before you execute it? [github.com/teaxyz/setup/install.sh][installer]
+   Wanna read that script before you execute it? [github.com/teaxyz/setup/installer.sh][installer]
    {% endhint %}
 
 2. `tea` is a standalone binary, so (if you want) you can also download it directly:
@@ -49,4 +49,4 @@ brew install teaxyz/pkgs/tea-cli
 
 [`brew`]: https://brew.sh
 [GitHub Releases]: https://github.com/teaxyz/cli/releases
-[installer]: https://github.com/teaxyz/setup/blob/main/install.sh
+[installer]: https://github.com/teaxyz/setup/blob/main/installer.sh

src/modes/shellcode.ts

@@ -130,7 +130,7 @@ export default function() {
       fi
     }
 
-    if test -n "$ZSH_VERSION"; then
+    if [ -n "$ZSH_VERSION" ] && [ $(emulate) = zsh ]; then
       eval 'typeset -ag chpwd_functions
 
             if [[ -z "\${chpwd_functions[(r)_tea_hook]+1}" ]]; then
@@ -145,18 +145,19 @@ export default function() {
               reply=($words)
             }
             compctl -K _tea tea'
-    elif test -n "$BASH_VERSION"; then
+    elif [ -n "$BASH_VERSION" ] && [ "$POSIXLY_CORRECT" != y ] ; then
       eval 'cd() {
               builtin cd "$@" || return
               _tea_chpwd_hook
             }
 
             _tea_chpwd_hook'
     else
+      POSIXLY_CORRECT=y
       echo "tea: warning: unsupported shell" >&2
     fi
 
-    if test -n "$BASH_VERSION$ZSH_VERSION"; then
+    if [ "$POSIXLY_CORRECT" != y ]; then
       eval 'tea@latest() {
               command tea tea@latest "$@"
             }'