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525 lines
12 KiB
525 lines
12 KiB
#!/bin/bash
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# vim: tw=80 ts=2 sw=2:
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set -eu
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# CONSTANTS
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# =========
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PROGRAM_NAME="$0"
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# DConf directory in which gnome-terminal profile configuration is stored.
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ROOT_DCONF_DIR='/org/gnome/terminal/legacy/profiles:/'
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# The names of ANSI color properties in config files.
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# Order matters. These correspond to the ANSI color codes.
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ANSI_COLOR_PROPERTIES=(
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"ansi-colors-black"
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"ansi-colors-red"
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"ansi-colors-green"
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"ansi-colors-yellow"
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"ansi-colors-blue"
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"ansi-colors-purple"
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"ansi-colors-cyan"
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"ansi-colors-white"
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"ansi-colors-bright-black"
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"ansi-colors-bright-red"
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"ansi-colors-bright-green"
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"ansi-colors-bright-yellow"
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"ansi-colors-bright-blue"
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"ansi-colors-bright-purple"
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"ansi-colors-bright-cyan"
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"ansi-colors-bright-white"
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)
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# LOGGING
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# =======
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# log ARGS...
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# echo for stderr
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function log() {
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echo 1>&2 "$@"
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}
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# die ARGS...
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# log then exit with an error code
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function die() {
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log "$@"
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exit 1
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}
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# CONFIG
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# ======
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#
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# Configuration files have a very basic grammar:
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#
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# PROPERTY_NAME = VALUE
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#
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# The functions below allow reading config file contents.
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# config_get_property file property
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# Echoes the given property from the given config file.
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function config_get_property() {
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file="$1"
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property="$2"
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sed -n "s:^${property} *= *\(\.*\):\1:p" < "${file}"
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}
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# config_get_property_or_die file property
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# config_get_property, except dies if the property is not found.
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function config_get_property_or_die() {
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file="$1"
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property="$2"
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result=$(config_get_property "${file}" "${property}")
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if [ -z "$result" ]; then
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die "Error: cannot find property '${property}' in file '${file}'."
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fi
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echo "${result}"
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}
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# config_get_font file
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function config_get_font() {
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file="$1"
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config_get_property "${file}" "font"
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}
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# config_get_foreground_color file
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function config_get_foreground_color() {
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file="$1"
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config_get_property "${file}" "foreground-color"
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}
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# config_get_background_color file
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function config_get_background_color() {
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file="$1"
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config_get_property "${file}" "background-color"
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}
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# join_ansi_colors COLOR1 ... COLOR16
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# Echoes "[${COLOR1}, ..., ${COLOR16}]".
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function join_ansi_colors () {
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echo -n "[$1"
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for i in {2..16}; do
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echo -n ", ${!i}" # Get the i-th argument to this function.
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done
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echo "]"
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}
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# config_get_ansi_colors file
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function config_get_ansi_colors() {
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file="$1"
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ansi_colors=()
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for property in "${ANSI_COLOR_PROPERTIES[@]}"; do
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# TODO: This does not actually die, because exit is called in a subshell.
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color=$(config_get_property_or_die "${file}" "${property}")
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ansi_colors+=("${color}")
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done
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join_ansi_colors "${ansi_colors[@]}"
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}
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# PROFILE
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# =======
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#
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# Gnome-terminal profile preferences are read and written through dconf.
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#
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# In the following functions, profiles are referenced by their dconf directory
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# paths (ending in a '/' character).
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# profile_path ID
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function profile_path() {
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id="$1"
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echo "${ROOT_DCONF_DIR}:${id}/"
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}
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# profile_list
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function profile_list() {
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dconf list "${ROOT_DCONF_DIR}" | sed -nE 's_^:(.*)/$_\1_p'
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}
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# profile_get_property profile property
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# Echoes the given property from the given gnome-terminal profile.
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function profile_get_property() {
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profile="$1"
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property="$2"
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dconf read "${profile}${property}"
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}
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# profile_set_property profile property value
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# Sets the given profile's given property to the given value.
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function profile_set_property() {
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profile="$1"
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property="$2"
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value="$3"
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dconf write "${profile}${property}" "${value}"
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}
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# profile_get_name profile
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# Echoes the human-readable name for the given gnome-terminal profile.
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function profile_get_name() {
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profile="$1"
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profile_get_property "${profile}" "visible-name"
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}
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# profile_set_name profile value
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# Sets the human-readable name for the given gnome-terminal profile.
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function profile_set_name() {
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profile="$1"
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value="$2"
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profile_set_property "${profile}" "visible-name" "${value}"
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}
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# profile_get_font profile
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# Echoes the font for the given gnome-terminal profile.
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function profile_get_font() {
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profile="$1"
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profile_get_property "${profile}" "font"
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}
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# profile_set_font profile value
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# Sets the font for the given gnome-terminal profile.
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function profile_set_font() {
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profile="$1"
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value="$2"
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profile_set_property "${profile}" "font" "${value}"
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}
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# profile_get_foreground_color profile
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# Echoes the foreground color for the given gnome-terminal profile.
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function profile_get_foreground_color() {
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profile="$1"
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profile_get_property "${profile}" "foreground-color"
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}
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# profile_set_foreground_color profile value
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# Sets the foreground color for the given gnome-terminal profile.
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function profile_set_foreground_color() {
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profile="$1"
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value="$2"
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profile_set_property "${profile}" "foreground-color" "${value}"
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}
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# profile_get_background_color profile
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# Echoes the background color for the given gnome-terminal profile.
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function profile_get_background_color() {
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profile="$1"
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profile_get_property "${profile}" "background-color"
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}
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# profile_set_background_color profile value
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# Sets the background color for the given gnome-terminal profile.
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function profile_set_background_color() {
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profile="$1"
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value="$2"
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profile_set_property "${profile}" "background-color" "${value}"
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}
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# profile_get_ansi_colors profile
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# Echoes the ANSI color palette for the given gnome-terminal profile.
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function profile_get_ansi_colors() {
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profile="$1"
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profile_get_property "${profile}" "palette"
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}
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# profile_set_ansi_colors profile value
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# Sets the ANSI color palette for the given gnome-terminal profile.
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function profile_set_ansi_colors() {
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profile="$1"
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value="$2"
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profile_set_property "${profile}" "palette" "${value}"
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}
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# ansi_colors_build_regex INDEX
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# Builds an extended regex to capture the color at INDEX as \2.
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function ansi_colors_build_regex() {
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index="$1"
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if [ "${index}" -lt 0 ] || [ "${index}" -gt 15 ]; then
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die "Error: invalid ansi color index '${index}'."
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fi
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# Match the opening bracket, which must be the first character.
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echo -n "^\["
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# Skip the items before the target index, if any.
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if [ "${index}" -gt 0 ]; then
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# These all end in a trailing comma.
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echo -n "([^,]*,){$((${index}))}"
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else
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# Capture nothing so that the target capture group is \2.
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echo -n "()"
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fi
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# Capture the target group (and not the comma).
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echo -n "([^,]*)"
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# Skip the remaining items, if any.
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if [ "${index}" -lt 15 ]; then
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# These all start with a leading comma.
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echo -n "(,[^,]*){$((15 - ${index}))}"
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fi
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# Match the closing bracket, which must be the last character.
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echo '\]$'
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}
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# ansi_colors get "[ COLOR1, ..., COLOR16 ]" INDEX
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ansi_colors_get() {
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colors_string="$1"
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index="$2"
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regex=$(ansi_colors_build_regex "${index}")
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echo "${colors_string}" | \
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sed -nE "s:${regex}:\\2:p" | \
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sed -e "s:^ *::" -e "s: *$::" # Remove whitespace.
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}
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# dump_ansi_colors "[ COLOR1, ..., COLOR16 ]"
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function dump_ansi_colors() {
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colors_string="$1"
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for i in {0..15}; do
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echo -n "${ANSI_COLOR_PROPERTIES[$i]} = "
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ansi_colors_get "${colors_string}" $i
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done
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}
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# profile_dump_config profile
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function profile_dump_config() {
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profile="$1"
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font=$(profile_get_font "${profile}")
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foreground_color=$(profile_get_foreground_color "${profile}")
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background_color=$(profile_get_background_color "${profile}")
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ansi_colors=$(profile_get_ansi_colors "${profile}")
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echo "font = ${font}"
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echo "foreground-color = ${foreground_color}"
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echo "background-color = ${background_color}"
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dump_ansi_colors "${ansi_colors}"
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}
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# profile_apply_config profile config_file
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# Applies the given configuration to the given gnome-terminal profile.
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function profile_apply_config() {
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profile="$1"
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config_file="$2"
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font=$(config_get_font "${config_file}")
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foreground_color=$(config_get_foreground_color "${config_file}")
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background_color=$(config_get_background_color "${config_file}")
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ansi_colors=$(config_get_ansi_colors "${config_file}")
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profile_set_font "${profile}" "${font}"
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profile_set_foreground_color "${profile}" "${foreground_color}"
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profile_set_background_color "${profile}" "${background_color}"
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profile_set_ansi_colors "${profile}" "${ansi_colors}"
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}
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# INTERACTIVE USE
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# ===============
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# choose_number prompt_base min max
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# Asks the user to choose a number between min and max, inclusive.
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# prompt_base should not end in a newline.
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function choose_number() {
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prompt_base="$1"
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min_number="$2"
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max_number="$3"
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while true; do
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read -p "${prompt_base} [${min_number} to ${max_number}]: " chosen_number
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if [ "${chosen_number}" -lt "${min_number}" ]; then
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continue
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fi
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if [ "${chosen_number}" -gt "${max_number}" ]; then
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continue
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fi
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echo "${chosen_number}"
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break
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done
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}
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# choose_profile
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# Echoes the path to a valid gnome-terminal profile to modify.
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function choose_profile() {
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# Build an array of profile subdirectories.
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profiles=()
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for profile_subdir in $(dconf list "${ROOT_DCONF_DIR}"); do
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profiles+=("${ROOT_DCONF_DIR}${profile_subdir}")
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done
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num_profiles="${#profiles[@]}"
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if [ "${num_profiles}" -eq 0 ]; then
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die "Error: found no gnome-terminal profiles to style."
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fi
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if [ "${num_profiles}" -eq 1 ]; then
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profile="${profiles[0]}"
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profile_name=$(profile_get_name "${profile}")
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log "Found single gnome-terminal profile named '${profile_name}', using it."
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echo "${profile}"
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return
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fi
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log "Available gnome-terminal profiles:"
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for i in $(seq 1 "${num_profiles}"); do
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profile="${profiles[$(($i - 1))]}"
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profile_name=$(profile_get_name "${profile}")
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log " #$i: ${profile_name}"
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done
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choose_number "Choose a profile" 1 "${num_profiles}"
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}
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# usage ERROR
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function usage() {
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ERROR="$1"
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log "Error: ${ERROR}"
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log
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log "USAGE: ${PROGRAM_NAME} SUBCOMMAND"
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log
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log "Where SUBCOMMAND can be one of:"
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log
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log " list"
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log " Lists the available gnome-terminal profiles."
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log
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log " get [profile PROFILE_ID] PROPERTY"
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log " Displays the given gnome-terminal profile property."
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log
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log " set [profile PROFILE_ID] PROPERTY VALUE"
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log " Sets the given gnome-terminal profile property to the given value."
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log
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log " dump [profile PROFILE_ID]"
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log " Dumps the given gnome-terminal as a configuration file to stdout."
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log
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log " apply [profile PROFILE_ID] FILE"
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log " Applies the gnome-terminal configuration file."
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die
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}
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# expect_arguments command expected actual
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function expect_arguments() {
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command="$1"
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expected="$2"
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actual="$3"
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if [ "${actual}" -ne "${expected}" ]; then
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die "Error: ${command} expects ${expected} arguments, got ${actual}."
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fi
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}
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# subcommand_list
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function subcommand_list() {
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expect_arguments "list" 0 $#
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profile_list
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}
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# subcommand_get profile property
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function subcommand_get() {
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expect_arguments "get" 1 $(($# - 1))
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profile="$1"
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property="$2"
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profile_get_property "${profile}" "${property}"
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}
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# subcommand_set profile property value
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function subcommand_set() {
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expect_arguments "set" 2 $(($# - 1))
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profile="$1"
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property="$2"
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value="$3"
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# TODO: quote the value properly
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profile_set_property "${profile}" "${property}" "${value}"
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}
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# subcommand_dump profile
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function subcommand_dump() {
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expect_arguments "dump" 0 $(($# - 1))
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profile="$1"
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profile_dump_config "${profile}"
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}
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# subcommand_apply profile
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function subcommand_apply() {
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expect_arguments "apply" 0 $(($# - 1))
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profile="$1"
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# Copy stdin to a temporary file.
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config_file=$(mktemp)
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tee > "${config_file}"
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# Apply the configuration file.
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profile_apply_config "${profile}" "${config_file}"
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}
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function main() {
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if [ "$#" -le 0 ]; then
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usage "Subcommand required."
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fi
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subcommand="$1"
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shift
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# Validate subcommand
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need_profile=1
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case "${subcommand}" in
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"list")
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need_profile=0
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;;
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"get")
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;;
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"set")
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;;
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"dump")
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;;
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"apply")
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;;
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*)
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usage "Unrecognized command '${subcommand}'."
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;;
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esac
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# Commands that do not need a profile can just execute now.
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if [ "${need_profile}" -eq 0 ]; then
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"subcommand_${subcommand}" "$@"
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return
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fi
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# Parse the optional `profile PROFILE_ID` clause if present.
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if [ "$#" -ge 1 ] && [ "$1" == "profile" ]; then
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if [ "$#" -eq 1 ]; then
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usage "expected profile ID after 'profile' keyword."
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fi
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profile=$(profile_path "$2")
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shift 2
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else
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profile=$(choose_profile)
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fi
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# Execute the subcommand.
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"subcommand_${subcommand}" "${profile}" "$@"
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}
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main "$@"
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