upgrade pip detetcion in pip-rehash to accept multiple variations: (#3330)

- pip
- pipX
- pipX.Y
- * -m pip

Co-authored-by: Christian Fredrik Johnsen <christian@johnsen.no>

pyenv.d/exec/pip-rehash.bash

@@ -4,6 +4,9 @@ PYENV_REHASH_COMMAND="${PYENV_COMMAND##*/}"
 # Remove any version information, from e.g. "pip2" or "pip3.10".
 if [[ $PYENV_REHASH_COMMAND =~ ^(pip|easy_install)[23](\.[0-9]+)?$ ]]; then
   PYENV_REHASH_COMMAND="${BASH_REMATCH[1]}"
+# Check for ` -m pip ` in arguments
+elif [[ "$*" =~ [[:space:]]-m[[:space:]]pip[[:space:]] ]]; then
+  PYENV_REHASH_COMMAND="pip"
 fi
 
 if [ -x "${PYENV_PIP_REHASH_ROOT}/${PYENV_REHASH_COMMAND}" ]; then

test/pip-rehash.bats

@@ -0,0 +1,67 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+create_executable() {
+  local bin="${PYENV_ROOT}/versions/${PYENV_VERSION}/bin"
+  mkdir -p "$bin"
+  echo "#!/bin/sh" > "${bin}/$1"
+  chmod +x "${bin}/$1"
+}
+
+copy_src_pyenvd() {
+  mkdir -p "${PYENV_ROOT}"
+  cp -r "${BATS_TEST_DIRNAME}/../pyenv.d" "${PYENV_ROOT}"
+}
+
+@test "pip-rehash triggered when using 'pip'" {
+  export PYENV_VERSION="3.7.14"
+  create_executable "example"
+  create_executable "pip"
+  copy_src_pyenvd
+  run command -v example 2> /dev/null
+  assert_failure
+  run pyenv-exec pip install example
+  assert_success
+  run command -v example 2> /dev/null
+  assert_success
+}
+
+@test "pip-rehash triggered when using 'pip3'" {
+  export PYENV_VERSION="3.7.14"
+  create_executable "example"
+  create_executable "pip3"
+  copy_src_pyenvd
+  run command -v example 2> /dev/null
+  assert_failure
+  run pyenv-exec pip3 install example
+  assert_success
+  run command -v example 2> /dev/null
+  assert_success
+}
+
+@test "pip-rehash triggered when using 'pip3.x'" {
+  export PYENV_VERSION="3.7.14"
+  create_executable "example"
+  create_executable "pip3.7"
+  copy_src_pyenvd
+  run command -v example 2> /dev/null
+  assert_failure
+  run pyenv-exec pip3.7 install example
+  assert_success
+  run command -v example 2> /dev/null
+  assert_success
+}
+
+@test "pip-rehash triggered when using 'python -m pip install'" {
+  export PYENV_VERSION="3.7.14"
+  create_executable "example"
+  create_executable "python"
+  copy_src_pyenvd
+  run command -v example 2> /dev/null
+  assert_failure
+  run pyenv-exec python -m pip install example
+  assert_success
+  run command -v example 2> /dev/null
+  assert_success
+}