Merge pull request #295 from akinomyoga/check-bash-version

oh-my-bash: Check Bash version and define `OMB_VERS{ION,INFO}`

lib/utils.sh

@@ -72,9 +72,6 @@
 
 ################################################################################
 
-_omb_version=10000
-_omb_bash_version=$((BASH_VERSINFO[0] * 10000 + BASH_VERSINFO[1] * 100 + BASH_VERSINFO[2]))
-
 function _omb_util_setexit {
   return "$1"
 }
@@ -93,7 +90,7 @@ function __omb_util_defun_deprecate__message {
 
 function _omb_util_defun_deprecate {
   local warning=
-  ((_omb_version>=$1)) &&
+  ((_omb_version >= $1)) &&
     warning='__omb_util_defun_deprecate__message "$2" "$3"; '
   builtin eval -- "function $2 { $warning$3 \"\$@\"; }"
 }

oh-my-bash.sh

@@ -10,6 +10,21 @@ case $- in
     *) return;;
 esac
 
+if [ ! -n "${BASH_VERSION-}" ]; then
+  printf '%s\n' 'oh-my-bash: This is not a Bash. Use OMB with Bash 3.2 or higher.' >&2
+  return 1
+fi
+_omb_bash_version=$((BASH_VERSINFO[0] * 10000 + BASH_VERSINFO[1] * 100 + BASH_VERSINFO[2]))
+if ((_omb_bash_version < 30200)); then
+  printf '%s\n' "oh-my-bash: OMB does not support this version of Bash ($BASH_VERSION)" >&2
+  printf '%s\n' "oh-my-bash: Use OMB with Bash 3.2 or higher" >&2
+  return 1
+fi
+
+OMB_VERSINFO=(1 0 0 0 master noarch)
+OMB_VERSION="${OMB_VERSINFO[0]}.${OMB_VERSINFO[1]}.${OMB_VERSINFO[2]}(${OMB_VERSINFO[3]})-${OMB_VERSINFO[4]} (${OMB_VERSINFO[5]})"
+_omb_version=$((OMB_VERSINFO[0] * 10000 + OMB_VERSINFO[1] * 100 + OMB_VERSINFO[2]))
+
 # Check for updates on initial load...
 if [[ $DISABLE_AUTO_UPDATE != true ]]; then
   source "$OSH"/tools/check_for_upgrade.sh

tools/install.sh

@@ -9,25 +9,38 @@ if [ -z "${BASH_VERSION-}" ]; then
 fi
 
 if [[ ! ${BASH_VERSINFO[0]-} ]] || ((BASH_VERSINFO[0] < 3 || BASH_VERSINFO[0] == 3 && BASH_VERSINFO[1] < 2)); then
-  printf "Error: Bash 3.2 required for Oh My Bash.\n"
-  printf "Error: Upgrade Bash and try again.\n"
+  printf "Error: Bash 3.2 required for Oh My Bash.\n" >&2
+  printf "Error: Upgrade Bash and try again.\n" >&2
   return 2 &>/dev/null || exit 2
+elif ((BASH_VERSINFO[0] < 4)); then
+  printf "Warning: Bash >=4 is no longer required for Oh My Bash but is cool to have ;)\n" >&2
+  printf "Warning: Why don't you upgrade your Bash to 4 or higher?\n" >&2
 fi
 
+_omb_install_print_version() {
+  local OMB_VERSINFO
+  OMB_VERSINFO=(1 0 0 0 master noarch)
+  printf '%s\n' 'Install script for Oh-My-Bash (https://github.com/ohmybash/oh-my-bash)'
+  printf 'oh-my-bash, version %s.%s.%s(%s)-%s (%s)\n' "${OMB_VERSINFO[@]}"
+}
+
 _omb_install_print_usage() {
   printf '%s\n' \
-    'usage: ./install.sh [--unattended | --help | --dry-run]' \
-    'usage: bash -c "$(< install.sh)" [--unattended | --help | --dry-run]'
+    'usage: ./install.sh [--unattended | --dry-run | --help | --usage | --version]' \
+    'usage: bash -c "$(< install.sh)" [--unattended | --dry-run | --help | --usage |' \
+    '           --version]'
 }
 
 _omb_install_print_help() {
+  _omb_install_print_version
   _omb_install_print_usage
   printf '%s\n' \
-    'Install script for Oh-My-Bash (https://github.com/ohmybash/oh-my-bash)' \
     '' \
     'OPTIONS' \
     '  --help            show this help' \
+    '  --usage           show usage' \
     '  --unattended      attend the meeting' \
+    '  --help            show version' \
     ''
 }
 
@@ -36,9 +49,12 @@ _omb_install_readargs() {
     local arg=$1; shift
     if [[ :$install_opts: != *:literal:* ]]; then
       case $arg in
-      --help | --unattended | --dry-run)
+      --help | --usage | --unattended | --dry-run)
         install_opts+=:${arg#--}
         continue ;;
+      --version | -v)
+        install_opts+=:version
+        continue ;;
       --)
         install_opts+=:literal
         continue ;;
@@ -93,12 +109,27 @@ _omb_install_main() {
   local install_opts=
   _omb_install_readargs "$@"
 
+  if [[ :$install_opts: == *:error:* ]]; then
+    printf '\n'
+    install_opts+=:usage
+  fi
   if [[ :$install_opts: == *:help:* ]]; then
     _omb_install_print_help
-    return 0
-  elif [[ :$install_opts: == *:error:* ]]; then
-    _omb_install_print_usage
+    install_opts+=:exit
+  else
+    if [[ :$install_opts: == *:version:* ]]; then
+      _omb_install_print_version
+      install_opts+=:exit
+    fi
+    if [[ :$install_opts: == *:usage:* ]]; then
+      _omb_install_print_usage
+      install_opts+=:exit
+    fi
+  fi
+  if [[ :$install_opts: == *:error:* ]]; then
     return 2
+  elif [[ :$install_opts: == *:exit:* ]]; then
+    return 0
   fi
 
   # Only enable exit-on-error after the non-critical colorization stuff,