Merge pull request #2303 from rbenv/print-command-tmpdir

print_command() {

  local arg

  local tmpdir="${TMPDIR%/}"

  for arg; do

    arg="${arg//$tmpdir\//\$TMPDIR/}"

    arg="${arg//$HOME\//\$HOME/}"

    [ "${#TMPDIR}" -le 1 ] || arg="${arg//$TMP\//\$TMPDIR/}"

    [ "${#HOME}" -le 1 ] || arg="${arg//$HOME\//\$HOME/}"

    case "$arg" in

    *\'* | *\$* )

      printf ' "%s"' "$arg" ;;

#!/usr/bin/env bats

load test_helper

@test "print_command" {

  mkdir -p "$TMP"

  cat <<EOF > "$TMP"/definition

print_command ./configure --prefix="\$PREFIX_PATH" --arg='with spaces'

EOF

  # substitute $TMPDIR in command invocations

  TMPDIR="/tmp/" run ruby-build "$TMP"/definition /tmp/path/to/prefix

  assert_output " ./configure \"--prefix=\$TMPDIR/path/to/prefix\" '--arg=with spaces'"

  # doesn't substitute TMPDIR if it didn't come from user's environment

  TMPDIR="" run ruby-build "$TMP"/definition /tmp/path/to/prefix

  assert_output " ./configure --prefix=/tmp/path/to/prefix '--arg=with spaces'"

  cat <<EOF > "$TMP"/definition

print_command install --bindir="$TMP"/home/.local/bin

EOF

  # substitute $HOME in command invocations

  HOME="$TMP"/home TMPDIR="" run ruby-build "$TMP"/definition /tmp/path/to/prefix

  assert_output " install \"--bindir=\$HOME/.local/bin\""

  # do not substitute $HOME if it's root path

  HOME="/" TMPDIR="" run ruby-build "$TMP"/definition /tmp/path/to/prefix

  assert_output " install --bindir=${TMP}/home/.local/bin"

}