Bash automated install option (#1922)

Bash automated install option for the case when ~/.profile sources ~/.bashrc

README.md

@@ -243,6 +243,21 @@ easy to fork and contribute any changes back upstream.
             eval "$(pyenv init --path)"
             ~~~
 
+            <!--This is an alternative option and needn't be replicated to `pyenv init`-->
+            Alternatively, for an automated installation, you can run the following:
+            ~~~ bash
+            echo -e 'if shopt -q login_shell; then' \
+                  '\n  export PYENV_ROOT="$HOME/.pyenv"' \
+                  '\n  export PATH="$PYENV_ROOT/bin:$PATH"' \
+                  '\n eval "$(pyenv init --path)"' \
+                  '\nfi' >> ~/.bashrc
+            echo -e 'if [ -z "$BASH_VERSION" ]; then'\
+                  '\n  export PYENV_ROOT="$HOME/.pyenv"'\
+                  '\n  export PATH="$PYENV_ROOT/bin:$PATH"'\
+                  '\n  eval "$(pyenv init --path)"'\
+                  '\nfi' >>~/.profile
+            ~~~
+
          **Note:** If you have `~/.bash_profile`, make sure that it too executes the above-added commands,
          e.g. by copying them there or by `source`'ing `~/.profile`.
 

libexec/pyenv-init

@@ -139,7 +139,7 @@ function help_() {
       if [[ $shell == "bash" ]]; then
         echo '# If your ~/.profile sources '"${rc}"','
         echo '# the lines need to be inserted before the part'
-        echo '# that does that.'
+        echo '# that does that. See the README for another option.'
         echo
         echo '# If you have '"${profile}"', make sure that it'
         echo '# also executes the above lines -- e.g. by'