minor changes
- all sequences now go through a wrapper. - added PF_COLOR to enable/disable colors in output. - etc, etc. Closes #89
This commit is contained in:
Dylan Araps
parent
71f18c30f8
commit
c225f75cc8
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@ -68,6 +68,11 @@ PF_SOURCE=""
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# Valid: string
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PF_SEP=":"
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# Enable/Disable colors in output:
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# Default: 1
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# Valid: 1 (enabled), 0 (disabled)
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PF_COLOR=1
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# Color of info names:
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# Default: unset (auto)
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# Valid: 0-9
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182
pfetch
182
pfetch
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@ -2,6 +2,51 @@
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#
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# pfetch - Simple POSIX sh fetch script.
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# Wrapper around all escape sequences used by pfetch to allow for
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# greater control over which sequences are used (if any at all).
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esc() {
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case $1 in
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CUU) e="${esc_c}[${2}A" ;; # cursor up
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CUD) e="${esc_c}[${2}B" ;; # cursor down
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CUF) e="${esc_c}[${2}C" ;; # cursor right
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CUB) e="${esc_c}[${2}D" ;; # cursor left
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# text formatting
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SGR)
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case ${PF_COLOR:=1} in
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(1)
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e="${esc_c}[${2}m"
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;;
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(0)
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# colors disabled
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e=
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;;
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esac
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;;
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# line wrap
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DECAWM)
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case $TERM in
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(dumb | minix | cons25)
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# not supported
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e=
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;;
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(*)
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e="${esc_c}[?7${2}"
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;;
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esac
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;;
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esac
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}
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# Print a sequence to the terminal.
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esc_p() {
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esc "$@"
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printf '%s' "$e"
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}
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# This is just a simple wrapper around 'command -v' to avoid
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# spamming '>/dev/null' throughout this function. This also guards
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# against aliases and functions.
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@ -85,10 +130,13 @@ log() {
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# Move the cursor to the right, the width of the ascii art with an
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# additional gap for text spacing.
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printf '[%sC' "$ascii_width"
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esc_p CUF "$ascii_width"
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# Print the info name and color the text.
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printf '[3%s;1m%s[m' "${PF_COL1-4}" "$name"
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esc_p SGR "3${PF_COL1-4}";
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esc_p SGR 1
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printf '%s' "$name"
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esc_p SGR 0
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# Print the info name and info data separator.
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printf %s "$PF_SEP"
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@ -96,11 +144,15 @@ log() {
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# Move the cursor backward the length of the *current* info name and
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# then move it forwards the length of the *longest* info name. This
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# aligns each info data line.
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printf '[%sD[%sC' "${#name}" "${PF_ALIGN:-$info_length}"
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esc_p CUB "${#name}"
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esc_p CUF "${PF_ALIGN:-$info_length}"
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# Print the info data, color it and strip all leading whitespace
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# from the string.
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printf '[3%sm%s[m\n' "${PF_COL2-7}" "$info"
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esc_p SGR "3${PF_COL2-7}"
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printf '%s' "$info"
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esc_p SGR 0
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printf '\n'
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# Keep track of the number of times 'log()' has been run.
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info_height=$((${info_height:-0} + 1))
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@ -118,13 +170,26 @@ get_title() {
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# the intention for using it is allowing the user to overwrite the
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# value on invocation.
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# shellcheck disable=SC2039
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hostname=${HOSTNAME:-${hostname:-$(hostname)}}
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host=${HOSTNAME:-${host:-$(hostname)}}
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# If the hostname is still not found, fallback to the contents of the
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# /etc/hostname file.
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[ "$hostname" ] || read -r hostname < /etc/hostname
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[ "$host" ] || read -r host < /etc/hostname
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log "[3${PF_COL3:-1}m${user}${c7}@[3${PF_COL3:-1}m${hostname}" " " >&6
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# Add escape sequences for coloring to user and host name. As we embed
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# them directly in the arguments passed to log(), we cannot use esc_p().
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esc SGR 1
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user=$e$user
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esc SGR "3${PF_COL3:-1}"
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user=$e$user
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esc SGR 1
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user=$user$e
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esc SGR 1
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host=$e$host
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esc SGR "3${PF_COL3:-1}"
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host=$e$host
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log "${user}@${host}" " " >&6
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}
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get_os() {
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@ -179,7 +244,9 @@ get_os() {
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# the file contents as plain-text.
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while IFS='=' read -r key val; do
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case $key in
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(PRETTY_NAME) distro=$val ;;
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(PRETTY_NAME)
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distro=$val
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;;
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esac
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done < /etc/os-release
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fi
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@ -198,7 +265,9 @@ get_os() {
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# very unique. This simply checks to see if the user's
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# PATH contains a Bedrock specific value.
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case $PATH in
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(*/bedrock/cross/*) distro='Bedrock Linux'
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(*/bedrock/cross/*)
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distro='Bedrock Linux'
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;;
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esac
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# Check to see if Linux is running in Windows 10 under
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@ -373,7 +442,7 @@ get_host() {
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# This string reconstruction is needed as some OEMs either leave the
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# identification information as "To be filled by OEM", "Default",
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# "undefined" etc and we shouldn't print this to the screen.
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for word; do
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for word do
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# This works by reconstructing the string by excluding words
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# found in the "blacklist" below. Only non-matches are appended
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# to the final host string.
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@ -530,8 +599,14 @@ get_pkgs() {
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has port && {
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pkg_list=$(port installed)
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case "$pkg_list" in ("No ports are installed.") :;; (*)
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case "$pkg_list" in
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("No ports are installed.")
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# do nothing
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;;
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(*)
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printf '%s\n' "$pkg_list"
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;;
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esac
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}
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;;
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@ -570,10 +645,16 @@ get_pkgs() {
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case $os in
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# IRIX's package manager adds 3 lines of extra
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# output which we must account for here.
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(IRIX) packages=$((packages - 3)) ;;
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(IRIX)
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packages=$((packages - 3))
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;;
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esac
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case "$packages" in (1?*|[2-9]*) log pkgs "$packages" >&6;; esac
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case $packages in
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(1?*|[2-9]*)
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log pkgs "$packages" >&6
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;;
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esac
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}
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get_memory() {
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@ -757,8 +838,13 @@ get_memory() {
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# A variable is then assigned based on the key.
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while read -r key val; do
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case $key in
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(*total) pages_full=$val ;;
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(*free) pages_free=$val ;;
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(*total)
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pages_full=$val
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;;
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(*free)
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pages_free=$val
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;;
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esac
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done <<-EOF
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$(kstat -p unix:0:system_pages:pagestotal \
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@ -797,8 +883,9 @@ get_memory() {
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get_wm() {
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case $os in
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(Darwin*)
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# Don't display window manager on macOS.
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(Darwin*) ;;
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;;
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(*)
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# xprop can be used to grab the window manager's properties
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@ -937,7 +1024,10 @@ get_palette() {
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#
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# This allows us to save hardcoding a second set of sequences
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# for background colors.
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palette="[7m$c1 $c1 $c2 $c2 $c3 $c3 $c4 $c4 $c5 $c5 $c6 $c6 [m"
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esc SGR 7
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palette="$e$c1 $c1 $c2 $c2 $c3 $c3 $c4 $c4 $c5 $c5 $c6 $c6 "
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esc SGR 0
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palette="$palette$e"
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# Print the palette with a new-line before and afterwards.
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printf '\n' >&6
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@ -1523,7 +1613,7 @@ get_ascii() {
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# printing of the information through user configuration.
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#
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# Iterate over each line of the ascii art to retrieve the above
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# information. The 'sed' is used to strip '[3Xm' color codes from
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# information. The 'sed' is used to strip '\033[3Xm' color codes from
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# the ascii art so they don't affect the width variable.
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while read -r line; do
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ascii_height=$((${ascii_height:-0} + 1))
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@ -1546,28 +1636,33 @@ get_ascii() {
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# Print the ascii art and position the cursor back where we
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# started prior to printing it.
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# '[1m': Print the ascii in bold.
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# '[m': Clear bold.
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# '[%sA': Move the cursor up '$ascii_height' amount of lines.
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printf '[1m%s[m[%sA' "$ascii" "$ascii_height" >&6
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{
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esc_p SGR 1
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printf '%s' "$ascii"
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esc_p SGR 0
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esc_p CUU "$ascii_height"
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} >&6
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}
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main() {
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case "$1" in (--version) {
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[ "$1" = --version ] && {
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printf 'pfetch 0.7.0\n'
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exit
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exit 0
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}
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# Hide 'stderr' unless the first argument is '-v'. This saves
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# polluting the script with '2>/dev/null'.
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;;(-v) :
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;;(*) exec 2>/dev/null
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;;esac
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[ "$1" = -v ] || {
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exec 2>/dev/null
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}
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# Hide 'stdout' and selectively print to it using '>&6'.
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# This gives full control over what it displayed on the screen.
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exec 6>&1 >/dev/null
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# Store raw escape sequence character for later reuse.
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esc_c=$(printf '\033')
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# Allow the user to execute their own script and modify or
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# extend pfetch's behavior.
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# shellcheck source=/dev/null
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@ -1581,25 +1676,16 @@ main() {
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# Generic color list.
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# Disable warning about unused variables.
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# shellcheck disable=2034
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{
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c1='[31m'; c2='[32m'
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c3='[33m'; c4='[34m'
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c5='[35m'; c6='[36m'
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c7='[37m'; c8='[38m'
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}
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for _c in c1 c2 c3 c4 c5 c6 c7 c8; do
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esc SGR "3${_c#?}" 0
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export "$_c=$e"
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done
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# Avoid text-wrapping from wrecking the program output.
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#
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# Some terminals don't support these sequences, nor do they
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# silently conceal them if they're printed resulting in
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# partial sequences being printed to the terminal!
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case "$TERM" in (dumb|minix|cons25) :;;(*)
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# Disable line-wrapping.
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printf '[?7l' >&6
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# Enable line-wrapping again on exit.
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trap 'printf [?7h >&6' EXIT
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;;esac
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# Disable line wrapping and catch the EXIT signal to enable it again
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# on exit. Ideally you'd somehow query the current value and retain
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# it but I'm yet to see this irk anyone.
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esc_p DECAWM l >&6
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trap 'esc_p DECAWM h >&6' EXIT
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# Store the output of 'uname' to avoid calling it multiple times
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# throughout the script. 'read <<EOF' is the simplest way of reading
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@ -1624,7 +1710,7 @@ main() {
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# Iterate over the info functions to determine the lengths of the
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# "info names" for output alignment. The option names and subtitles
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# match 1:1 so this is thankfully simple.
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for info; do
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for info do
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command -v "get_$info" >/dev/null || continue
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# This was a ternary operation but they aren't supported in
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@ -1637,7 +1723,9 @@ main() {
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info_length=$((info_length + 1))
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# Iterate over the above list and run any existing "get_" functions.
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for info; do "get_$info"; done
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for info do
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"get_$info"
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done
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}
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# Position the cursor below both the ascii art and information lines
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