update README with example

README.md

@@ -243,6 +243,7 @@ You can set certain environment variables to control pyenv-virtualenv.
 * `PIP_VERSION`, if set and `venv` is preferred
   over `virtualenv`, install the specified version of pip.
 * `PYENV_VIRTUALENV_VERBOSE_ACTIVATE`, if set, shows some verbose outputs on activation and deactivation
+* `PYENV_VIRTUALENV_PROMPT`, if set, allows users to customize how `pyenv-virtualenv` modifies their shell prompt. The default prompt ("(venv)") is overwritten with any user-specified text. Specify the location of the virtual environment name with the string `{venv}`.
 
 ## Version History
 

bin/pyenv-sh-activate

@@ -262,9 +262,14 @@ EOS
     fi
     ;;
   * )
+    if [ -z "${PYENV_VIRTUALENV_PROMPT}" ]; then
+      PYENV_VIRTUALENV_PROMPT="(${venv})"
+    else
+      PYENV_VIRTUALENV_PROMPT="${PYENV_VIRTUALENV_PROMPT/\{venv\}/${venv}}"
+    fi
     cat <<EOS
 export _OLD_VIRTUAL_PS1="\${PS1:-}";
-export PS1="(${venv}) \${PS1:-}";
+export PS1="${PYENV_VIRTUALENV_PROMPT} \${PS1:-}";
 EOS
     ;;
   esac

test/activate.bats

@@ -44,6 +44,31 @@ EOS
   unstub pyenv-sh-deactivate
 }
 
+@test "activate virtualenv from current version with custom prompt" {
+  export PYENV_VIRTUALENV_INIT=1
+
+  stub pyenv-version-name "echo venv"
+  stub pyenv-virtualenv-prefix "venv : echo \"${PYENV_ROOT}/versions/venv\""
+  stub pyenv-prefix "venv : echo \"${PYENV_ROOT}/versions/venv\""
+  stub pyenv-sh-deactivate "--force --quiet : echo deactivated"
+
+  PYENV_SHELL="bash" PYENV_VERSION="venv" PYENV_VIRTUALENV_PROMPT='venv:{venv}' run pyenv-sh-activate
+
+  assert_success
+  assert_output <<EOS
+deactivated
+export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/venv";
+export VIRTUAL_ENV="${PYENV_ROOT}/versions/venv";
+export _OLD_VIRTUAL_PS1="\${PS1:-}";
+export PS1="venv:venv \${PS1:-}";
+EOS
+
+  unstub pyenv-version-name
+  unstub pyenv-virtualenv-prefix
+  unstub pyenv-prefix
+  unstub pyenv-sh-deactivate
+}
+
 @test "activate virtualenv from current version (quiet)" {
   export PYENV_VIRTUALENV_INIT=1
 

test/conda-activate.bats

@@ -53,6 +53,35 @@ EOS
   teardown_conda "anaconda-2.3.0"
 }
 
+@test "activate conda root from current version with custom prompt" {
+  export PYENV_VIRTUALENV_INIT=1
+
+  setup_conda "anaconda-2.3.0"
+  stub pyenv-version-name "echo anaconda-2.3.0"
+  stub pyenv-virtualenv-prefix "anaconda-2.3.0 : echo \"${PYENV_ROOT}/versions/anaconda-2.3.0\""
+  stub pyenv-prefix "anaconda-2.3.0 : echo \"${PYENV_ROOT}/versions/anaconda-2.3.0\""
+  stub pyenv-sh-deactivate "--force --quiet : echo deactivated"
+
+  PYENV_SHELL="bash" PYENV_VERSION="anaconda-2.3.0" PYENV_VIRTUALENV_PROMPT='venv:{venv}' run pyenv-sh-activate
+
+  assert_success
+  assert_output <<EOS
+deactivated
+export PYENV_VIRTUAL_ENV="${PYENV_ROOT}/versions/anaconda-2.3.0";
+export VIRTUAL_ENV="${PYENV_ROOT}/versions/anaconda-2.3.0";
+export CONDA_DEFAULT_ENV="root";
+export _OLD_VIRTUAL_PS1="\${PS1:-}";
+export PS1="venv:anaconda-2.3.0 \${PS1:-}";
+export CONDA_PREFIX="${TMP}/pyenv/versions/anaconda-2.3.0";
+EOS
+
+  unstub pyenv-version-name
+  unstub pyenv-virtualenv-prefix
+  unstub pyenv-prefix
+  unstub pyenv-sh-deactivate
+  teardown_conda "anaconda-2.3.0"
+}
+
 @test "activate conda root from current version (fish)" {
   export PYENV_VIRTUALENV_INIT=1