Add sh functions to check for, and start poetry environments

ohmyzsh/aliases.zsh

@@ -1,7 +1,30 @@
-vim ()
+poetry_installed()
 {
-    poetry env info > /dev/null 2>&1 && poetry run nvim $@ || nvim $@
+    command -v poetry > /dev/null 2>&1 && return 0 || echo "Poetry not installed"
+    return 1
+}
+poetry_env_exists()
+{
+    poetry_installed && {
+        poetry env info > /dev/null 2>&1 && return 0\
+            || echo "No poetry environment configured for $(pwd)"
+    }
+    return 1
+}
+penv()
+{
+    poetry_env_exists && source "$(poetry env info --path)/bin/activate" || return 1
+}
+pshell()
+{
+    poetry_env_exists && poetry shell || return 1
+}
+prun()
+{
+    poetry_env_exists && poetry run $@ || return 1
 }
 
+alias vim="nvim"
+alias vimdiff="nvim -d"
 alias nvimdiff="nvim -d"
 alias lg="lazygit"