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add preview and configuration saving to prompt theming

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fatalerrors
2026-05-21 11:43:15 +02:00
parent c92ca8a51f
commit f923dcb758
2 changed files with 236 additions and 19 deletions
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251
profile.d/prompt.sh
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@@ -169,6 +169,107 @@ load_theme()
# ------------------------------------------------------------------------------
# ------------------------------------------------------------------------------
# Persist PROMPT_THEME in profile configuration ([prompt] section).
# Preference order: ~/.profile.conf when present, else PROFILE_CONF.
_set_theme_save_prompt_theme()
{
local theme_name="$1"
[[ -z "$theme_name" ]] && {
disp E "Cannot save an empty theme name."
return 1
}
local conf_file
if [[ -f "$HOME/.profile.conf" ]]; then
conf_file="$HOME/.profile.conf"
else
conf_file="${PROFILE_CONF:-${MYPATH}/profile.conf}"
fi
local conf_dir
conf_dir="${conf_file%/*}"
[[ -d "$conf_dir" ]] || mkdir -p "$conf_dir" || {
disp E "Unable to create configuration directory: $conf_dir"
return 1
}
local tmp_file="${conf_file}.tmp.$$"
if [[ ! -e "$conf_file" ]]; then
{
printf "[prompt]\n"
printf "PROMPT_THEME=%s\n" "$theme_name"
} > "$conf_file" || {
disp E "Unable to write configuration file: $conf_file"
return 1
}
return 0
fi
awk -v theme="$theme_name" '
BEGIN {
in_prompt = 0
saw_prompt = 0
wrote_key = 0
}
{
if ($0 ~ /^\[[^]]+\][[:space:]]*$/) {
if (in_prompt && !wrote_key) {
print "PROMPT_THEME=" theme
wrote_key = 1
}
if ($0 == "[prompt]") {
in_prompt = 1
saw_prompt = 1
} else {
in_prompt = 0
}
print
next
}
if (in_prompt && $0 ~ /^[[:space:]]*PROMPT_THEME[[:space:]]*=/) {
if (!wrote_key) {
print "PROMPT_THEME=" theme
wrote_key = 1
}
next
}
print
}
END {
if (in_prompt && !wrote_key) {
print "PROMPT_THEME=" theme
wrote_key = 1
}
if (!saw_prompt) {
print ""
print "[prompt]"
print "PROMPT_THEME=" theme
}
}
' "$conf_file" > "$tmp_file" || {
rm -f "$tmp_file"
disp E "Unable to update configuration file: $conf_file"
return 1
}
mv "$tmp_file" "$conf_file" || {
rm -f "$tmp_file"
disp E "Unable to replace configuration file: $conf_file"
return 1
}
}
# Not exported, it remains private
# ------------------------------------------------------------------------------
# ------------------------------------------------------------------------------
# Dynamically switch the prompt theme for the current shell session.
# Calls load_theme to apply the new colour values immediately, then updates
@@ -179,27 +280,86 @@ load_theme()
set_theme()
{
local theme_dir="${PROMPT_THEME_DIR:-${MYPATH}/profile.d/themes}"
local preview=0
local save=0
local list_only=0
local theme_name=""
# -- help mode -----------------------------------------------------------
if [[ "$1" == "-h" || "$1" == "--help" ]]; then
printf "set_theme: Switch the prompt colour theme for the current shell session.\n\n"
printf "Usage: set_theme [options] [theme]\n\n"
printf "Options:\n"
printf "\t-h, --help\tDisplay this help screen\n"
printf "\t-l, --list\tList available themes (default when no argument is given)\n\n"
printf "Arguments:\n"
printf "\ttheme \tBare theme name (e.g. 'dark') or an explicit path to a .theme file.\n"
printf "\t \tThemes are searched in: %s\n" "$theme_dir"
printf "\t \tOverride with PROMPT_THEME_DIR in profile.conf [prompt].\n\n"
printf "Examples:\n"
printf "\tset_theme \t— list available themes\n"
printf "\tset_theme dark \t— apply the dark theme\n"
printf "\tset_theme ~/my.theme\t— apply a theme by path\n"
return 0
while [[ $# -gt 0 ]]; do
case "$1" in
-h|--help)
printf "set_theme: Switch the prompt colour theme for the current shell session.\n\n"
printf "Usage: set_theme [options] [theme]\n\n"
printf "Options:\n"
printf "\t-h, --help\tDisplay this help screen\n"
printf "\t-l, --list\tList available themes (default when no argument is given)\n"
printf "\t-p, --preview\tPreview a theme without applying it\n\n"
printf "\t-S, --save\tSave theme to configuration ([prompt] PROMPT_THEME)\n\n"
printf "Arguments:\n"
printf "\ttheme \tBare theme name (e.g. 'dark') or an explicit path to a .theme file.\n"
printf "\t \tThemes are searched in: %s\n" "$theme_dir"
printf "\t \tOverride with PROMPT_THEME_DIR in profile.conf [prompt].\n\n"
printf "Examples:\n"
printf "\tset_theme \t— list available themes\n"
printf "\tset_theme dark \t— apply the dark theme\n"
printf "\tset_theme -p dark \t— preview the dark theme\n"
printf "\tset_theme -S \t— save current theme in config\n"
printf "\tset_theme -S dark \t— apply and save the dark theme\n"
printf "\tset_theme ~/my.theme\t— apply a theme by path\n"
return 0
;;
-l|--list)
list_only=1
shift
;;
-p|--preview)
preview=1
shift
;;
-S|--save)
save=1
shift
;;
--)
shift
break
;;
-*)
disp E "Unknown option: $1, use \"set_theme --help\" to display usage."
return 1
;;
*)
if [[ -n "$theme_name" ]]; then
disp E "Too many arguments. Usage: set_theme [options] [theme]"
return 1
fi
theme_name="$1"
shift
;;
esac
done
if [[ $# -gt 0 ]]; then
if [[ -n "$theme_name" ]]; then
disp E "Too many arguments. Usage: set_theme [options] [theme]"
return 1
fi
theme_name="$1"
shift
fi
# -- list mode -----------------------------------------------------------
if [[ $# -eq 0 || "$1" == "-l" || "$1" == "--list" ]]; then
if (( list_only )) || [[ -z "$theme_name" && $preview -eq 0 ]]; then
if (( save )); then
if [[ -n "${PROMPT_THEME:-}" ]]; then
_set_theme_save_prompt_theme "$PROMPT_THEME" || return 1
disp I "Saved current prompt theme '$PROMPT_THEME' to configuration."
return 0
fi
disp E "No active theme to save. Apply a theme first or pass one with -S."
return 1
fi
printf "Available themes in %s:\n" "$theme_dir"
local f name
for f in "$theme_dir"/*.theme; do
@@ -215,14 +375,69 @@ set_theme()
return 0
fi
if (( preview )) && [[ -z "$theme_name" ]]; then
disp E "--preview requires a theme argument."
return 1
fi
if (( preview && save )); then
disp E "--preview and --save cannot be used together."
return 1
fi
# -- preview mode --------------------------------------------------------
if (( preview )); then
local old_theme="${PROMPT_THEME:-}"
local -a old_prompt_color_vars=()
local _v
for _v in ${!PROMPT_COLOR_@}; do
old_prompt_color_vars+=("$_v=${!_v}")
done
set_colors
load_theme "$theme_name" || {
set_colors
if [[ -n "$old_theme" ]]; then
load_theme "$old_theme" || true
export PROMPT_THEME="$old_theme"
fi
return 1
}
printf "Preview for theme '%s':\n" "$theme_name"
printf " %b13:37:00%b %b0%b %b•%b %buser%b@%bhost%b %b/path/to/dir%b %bgit:main +1/-0%b\n" \
"${PROMPT_COLOR_TIME_FG:-}" "${DEFAULTCOL:-}" \
"${PROMPT_COLOR_OK_FG:-}" "${DEFAULTCOL:-}" \
"${PROMPT_COLOR_OK_MARK:-}" "${DEFAULTCOL:-}" \
"${PROMPT_COLOR_USER_FG:-}" "${DEFAULTCOL:-}" \
"${PROMPT_COLOR_ROOT_FG:-}" "${DEFAULTCOL:-}" \
"${PROMPT_COLOR_DIR_FG:-}" "${DEFAULTCOL:-}" \
"${PROMPT_COLOR_CTX_FG:-}" "${DEFAULTCOL:-}"
set_colors
if [[ -n "$old_theme" ]]; then
load_theme "$old_theme" || true
export PROMPT_THEME="$old_theme"
fi
for _v in "${old_prompt_color_vars[@]}"; do
export "$_v"
done
return 0
fi
# -- apply mode ----------------------------------------------------------
local theme_name="$1"
# Reset colours to defaults before loading the new theme
set_colors
load_theme "$theme_name" || return 1
export PROMPT_THEME="$theme_name"
if (( save )); then
_set_theme_save_prompt_theme "$theme_name" || return 1
disp I "Prompt theme set to $theme_name and saved to configuration."
return 0
fi
disp I "Prompt theme set to $theme_name."
}
export -f set_theme