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author | 2006-08-14 23:33:12 +0000 | |
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committer | 2006-08-14 23:33:12 +0000 | |
commit | 6ad0ae577ab21714f240e54c10fb4a5b2439710c (patch) | |
tree | ff08c3c649c79634da4e1d23de518216469cb7f6 | |
parent | dev-db/slony1: Added upgrading steps/instructions for pkg_config (diff) | |
download | testing-6ad0ae577ab21714f240e54c10fb4a5b2439710c.tar.gz testing-6ad0ae577ab21714f240e54c10fb4a5b2439710c.tar.bz2 testing-6ad0ae577ab21714f240e54c10fb4a5b2439710c.zip |
eclass/einput: Added add_init_prompt to help streamlien init-script addition
svn path=/testing/; revision=80
-rw-r--r-- | eclass/einput.eclass | 286 |
1 files changed, 286 insertions, 0 deletions
diff --git a/eclass/einput.eclass b/eclass/einput.eclass new file mode 100644 index 0000000..5cc113e --- /dev/null +++ b/eclass/einput.eclass @@ -0,0 +1,286 @@ +# Copyright 1999-2006 Gentoo Foundation +# Distributed under the terms of the GNU General Public License v2 +# Author John Jawed <johnjawed@gmail.com> +# Author Alex Tarkovsky <alextarkovsky@gmail.com> +# $Header: $ + +# This eclass provides enhanced input functions for ebuilds. + +ESC_SEQ=$'\e[' + +BOLD="${ESC_SEQ}01m" +NORMAL="${ESC_SEQ}00m" + +BLUE="${ESC_SEQ}34;01m" +BROWN="${ESC_SEQ}33m" +DARKBLUE="${ESC_SEQ}34m" +DARKGREEN="${ESC_SEQ}32m" +DARKRED="${ESC_SEQ}31m" +FUCHSIA="${ESC_SEQ}35;01m" +GREEN="${ESC_SEQ}32;01m" +PURPLE="${ESC_SEQ}35m" +RED="${ESC_SEQ}31;01m" +TEAL="${ESC_SEQ}36m" +TURQUOISE="${ESC_SEQ}36;01m" +YELLOW="${ESC_SEQ}33;01m" + +EINPUT_COLORS=( + $BLUE + $BROWN + $DARKBLUE + $DARKGREEN + $DARKRED + $FUCHSIA + $GREEN + $PURPLE + $RED + $TEAL + $TURQUOISE + $YELLOW +) + +# Stores the user input received by the last einput function called (with the +# exception of einput_confirm(), which stores the user's choice and its own exit +# status). +EINPUT_ANSWER="" + +# Stores the user input received by the last einput function called (with the +# exception of einput_confirm(), which stores the user's choice and its own exit +# status). This answer is always in lower-case. +EINPUT_IANSWER="" + +# Set EINPUT_NOCOLOR to "0" to disable colorized output, or "1" to allow it. +# After inheriting this eclass ebuilds may set this var directly, but it's +# preferred to rely on the value supplied here by portageq. +if [[ "$(portageq envvar NOCOLOR 2>/dev/null)" =~ "true|yes" ]] ; then + EINPUT_NOCOLOR=1 +else + EINPUT_NOCOLOR=0 +fi +[[ "$(${ROOT}/sbin/consoletype 2> /dev/null)" == "serial" || $EINPUT_NOCOLOR == 1 ]] && + unset BOLD NORMAL BLUE BROWN DARKBLUE DARKGREEN DARKRED FUCHSIA GREEN \ + PURPLE RED TEAL TURQUOISE YELLOW EINPUT_COLORS + +# Usage: einput_confirm question [ default_value ] +# +# Get confirmation from a user with a standard yes/no prompt. If the user simply +# presses Enter when prompted, the green-colored value (or if the NOCOLOR +# evnironment variable is set, the value in all capital letters) will be used. +# This default can be set with the optional default_value parameter; accepted +# values are "0" (corresponding to "no") and "1" (for "yes"). +# +# Returns: Exit status 0 for "no", exit status 1 for "yes", stores user answer +# in $EINPUT_ANSWER and for case insensitive comparisons in $EINPUT_IANSWER +# Default: default_value if given, else 1 +# +# Example: einput_confirm "Are you sure you want to rm -rf /?" "0" +# +einput_confirm() { + local color_yes color_no + local string_yes="Yes" string_no="No" + if [[ "$2" == "0" ]] ; then + if [[ $EINPUT_NOCOLOR == 1 ]] ; then + string_yes="yes" + string_no="NO" + else + color_yes=$RED + color_no=$GREEN + fi + else + if [[ $EINPUT_NOCOLOR == 1 ]] ; then + string_yes="YES" + string_no="no" + else + color_yes=$GREEN + color_no=$RED + fi + fi + while true ; do + echo -n "${BOLD}${1}${NORMAL} [${color_yes}${string_yes}${NORMAL}/${color_no}${string_no}${NORMAL}] " + read -r answer + echo + case "$answer" in + [yY]*) + EINPUT_ANSWER=${string_yes} + EINPUT_IANSWER=`echo -n ${EINPUT_ANSWER} | tr [:upper:] [:lower:]` + return 1 ;; + + [nN]*) + EINPUT_ANSWER=${string_no} + EINPUT_IANSWER=`echo -n ${EINPUT_ANSWER} | tr [:upper:] [:lower:]` + return 0 ;; + + "") + [[ "$2" == "0" ]] && EINPUT_ANSWER=${string_no} && \ + EINPUT_IANSWER=`echo -n ${EINPUT_ANSWER} | tr [:upper:] [:lower:]` && return 0 + EINPUT_ANSWER=${string_yes} + EINPUT_IANSWER=`echo -n ${EINPUT_ANSWER} | tr [:upper:] [:lower:]` + return 1 ;; + + *) + echo "!!! Invalid answer, try again." + echo + ;; + esac + done +} + +# Usage: einput_list option1 description1 [ option2 description2 ... ] prompt +# +# Display a colorized (unless the environment variable NOCOLOR is set) selection +# list of options and their descriptions, along with a prompt line. Options may +# be alphanumeric and are handled as strings. +# +# Matching of user input against option strings is case-sensitive. +# +# Returns: The chosen option as a string, stored in global $EINPUT_ANSWER +# and lower case for case-insensitive comparisons in global $EINPUT_IANSWER. +# Default: none +# +# Example: einput_list "1" "List Entry" "2" "List File" "Choose a listing style" +# +einput_list() { + local choices=( ) + local num_choices=$(( ($# - 1) / 2 )) + echo "${BOLD}----------------------------------------------${NORMAL}" + for (( i = 0, j = 0 ; i < num_choices ; i++, j++ )) ; do + (( j == ${#EINPUT_COLORS[*]} )) && j=0 + echo " ${EINPUT_COLORS[${j}]}${1})${NORMAL} ${2}" + choices[$i]="$1" + shift 2 + done + echo "${BOLD}----------------------------------------------${NORMAL}" + while true ; do + echo -n "${BOLD}${1}${NORMAL}" + read -rp ": " answer + echo + for choice in ${choices[*]} ; do + if [[ "$choice" == "$answer" ]] ; then + break 2 + elif [[ "$choice" == "${choices[$((num_choices - 1))]}" ]] ; then + echo "!!! Invalid answer, try again." + echo + fi + done + done + EINPUT_ANSWER="$answer" + EINPUT_IANSWER=`echo -n ${EINPUT_ANSWER} | tr [:upper:] [:lower:]` +} + +# Usage: einput_prompt prompt [ default_value ] +# +# Display a simple input prompt. If default_value is specified, its value will +# be displayed between brackets at the end of the prompt, highlighted in green +# letters (unless the environment variable NOCOLOR is set). If no default value +# is given, the brackets will be empty. +# +# Returns: The user's response as a string, stored in global $EINPUT_ANSWER +# and lower case for case-insensitive comparisons in global $EINPUT_IANSWER. +# Default: default_value if given, else an empty string "" +# +# Example: einput_prompt "Is Gentoo a good Linux distro?" "Yes it is Jim" +# +einput_prompt() { + echo -n "${BOLD}${1}${NORMAL} [${GREEN}${2}${NORMAL}] " + read -r answer + echo + if [[ -z "$answer" ]] ; then + EINPUT_ANSWER="$2" + else + EINPUT_ANSWER="$answer" + fi + EINPUT_IANSWER=`echo -n ${EINPUT_ANSWER} | tr [:upper:] [:lower:]` +} + +# Usage: einput_prompt_secret prompt +# +# Display a simple input prompt and hide the user's input as they type. Useful +# for when some operation requires a different set of user privileges. +# +# Returns: The user's response as a string, stored in global $EINPUT_ANSWER +# and lower case for case-insensitive comparisons in global $EINPUT_IANSWER. +# Default: none +# +# Example: einput_prompt_secret "Please enter your root password" +# +einput_prompt_secret() { + echo -n "${BOLD}${1}${NORMAL}" + read -rsp ": " answer + echo + echo + EINPUT_ANSWER="$answer" + EINPUT_IANSWER=`echo -n ${EINPUT_ANSWER} | tr [:upper:] [:lower:]` +} + +# Usage: einput_multi_prompt prompt option1 [ option2 ... ] default_value +# +# Display an in-line input prompt with a set of options. +# If default_value is specified, its value will be displayed between brackets +# at the end of the prompt, highlighted in green +# letters (unless the environment variable NOCOLOR is set). If no default value +# is given, the brackets will be empty. +# +# Returns: The user's response as a string, stored in global $EINPUT_ANSWER +# and lower case for case-insensitive comparisons in global $EINPUT_IANSWER +# Default: default_value if given, else an empty string "" +# +# Example: einput_multi_prompt "Please select your bindings" "C" "C++" "Python" "C" +# +einput_multi_prompt() { + local choices=( ) + local num_choices=$(( ($# - 2) )) + local prompt="${BOLD}${1}${NORMAL}" + shift + local display_choices="" + for (( i = 0, j = 0 ; i < num_choices ; i++, j++ )) ; do + (( j == ${#EINPUT_COLORS[*]} )) && j=0 + display_choices="${display_choices}${EINPUT_COLORS[${j}]}${1}" + choices[$i]="$1" + shift + if [ $i -lt $# ];then + display_choices="${display_choices}${NORMAL}/" + fi + done + echo -n "${prompt} ${NORMAL}<${display_choices}${NORMAL}> " + while true ; do + echo -n "${NORMAL}[${GREEN}${1}${NORMAL}]" + read -rp ": " answer + echo + for choice in ${choices[*]} ; do + if [[ "$choice" == "$answer" ]] ; then + break 2 + elif [[ "$choice" == "${choices[$((num_choices - 1))]}" ]] ; then + echo "!!! Invalid answer, try again." + echo + fi + done + done + EINPUT_ANSWER="$answer" + EINPUT_IANSWER=`echo -n ${EINPUT_ANSWER} | tr [:upper:] [:lower:]` +} + +# Usage: einput_add_init prompt +# +# Displays a simple predefined prompt with the package name ($1) asking if +# a packages init script should be added to the $2 runlevel. If an init +# script already exists, no prompt will be shown and the function will return +# 0. +# +# Returns: The exit code from rc-update if an existing entry does not exist. +# If an existing entry exists, returns 0. +# Default: none +# +# Example: einput_add_init "postgresql" "default" +# +einput_add_init() { + check_if_exists=`${ROOT}/sbin/rc-update show $2 | grep $1 | wc -l` + if [ "${check_if_exists}" == "0" ]; then + if einput_confirm "Do you want to add $1 to your default runlevel?" "0"; + then + ${ROOT}/sbin/rc-update add $1 $2 + return $? + fi + else + return 0 + fi +} |