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-rw-r--r--pkgs/simple/q-power_supply.nix146
1 files changed, 146 insertions, 0 deletions
diff --git a/pkgs/simple/q-power_supply.nix b/pkgs/simple/q-power_supply.nix
new file mode 100644
index 0000000..ef133bf
--- /dev/null
+++ b/pkgs/simple/q-power_supply.nix
@@ -0,0 +1,146 @@
+{ gawk, gnused, writeDashBin }:
+
+writeDashBin "q-power_supply" ''
+ power_supply() {(
+ set -efu
+ uevent=$1
+ eval "$(${gnused}/bin/sed -n '
+ s/^\([A-Z_]\+=[0-9A-Za-z_-]*\)$/export \1/p
+ ' $uevent)"
+ case $POWER_SUPPLY_NAME in
+ AC|Mains)
+ exit # not battery
+ ;;
+ esac
+ exec </dev/null
+ exec ${gawk}/bin/awk '
+ function die(s) {
+ printf "%s: %s\n", name, s
+ exit 1
+ }
+
+ function print_hm(h, m) {
+ m = (h - int(h)) * 60
+ return sprintf("%dh%dm", h, m)
+ }
+
+ function print_bar(r) {
+ return \
+ (r >= .1 ? bar_gradient[0] : bar_background) "■" \
+ (r >= .2 ? bar_gradient[1] : bar_background) "■" \
+ (r >= .3 ? bar_gradient[2] : bar_background) "■" \
+ (r >= .4 ? bar_gradient[3] : bar_background) "■" \
+ (r >= .5 ? bar_gradient[4] : bar_background) "■" \
+ (r >= .6 ? bar_gradient[5] : bar_background) "■" \
+ (r >= .7 ? bar_gradient[6] : bar_background) "■" \
+ (r >= .8 ? bar_gradient[7] : bar_background) "■" \
+ (r >= .9 ? bar_gradient[8] : bar_background) "■" \
+ (r >= 1 ? bar_gradient[9] : bar_background) "■" \
+ sgr()
+ }
+
+ function rgb(r, g, b) {
+ return sgr("38;2;" r ";" g ";" b)
+ }
+
+ function sgr(p) {
+ return "\x1b[" p "m"
+ }
+
+ BEGIN {
+ bar_gradient[0] = rgb(216, 100, 83)
+ bar_gradient[1] = rgb(210, 113, 72)
+ bar_gradient[2] = rgb(201, 125, 65)
+ bar_gradient[3] = rgb(190, 137, 63)
+ bar_gradient[4] = rgb(178, 148, 67)
+ bar_gradient[5] = rgb(166, 158, 75)
+ bar_gradient[6] = rgb(153, 167, 88)
+ bar_gradient[7] = rgb(140, 174, 104)
+ bar_gradient[8] = rgb(127, 181, 122)
+ bar_gradient[9] = rgb(116, 187, 141)
+ bar_background = rgb( 64, 64, 64)
+ }
+
+ END {
+ name = ENVIRON["POWER_SUPPLY_NAME"]
+ status = ENVIRON["POWER_SUPPLY_STATUS"]
+
+ charge_unit = "Ah"
+ charge_now = ENVIRON["POWER_SUPPLY_CHARGE_NOW"] / 10^6
+ charge_full = ENVIRON["POWER_SUPPLY_CHARGE_FULL"] / 10^6
+
+ current_unit = "A"
+ current_now = ENVIRON["POWER_SUPPLY_CURRENT_NOW"] / 10^6
+
+ energy_unit = "Wh"
+ energy_now = ENVIRON["POWER_SUPPLY_ENERGY_NOW"] / 10^6
+ energy_full = ENVIRON["POWER_SUPPLY_ENERGY_FULL"] / 10^6
+
+ power_unit = "W"
+ power_now = ENVIRON["POWER_SUPPLY_POWER_NOW"] / 10^6
+
+ voltage_unit = "V"
+ voltage_now = ENVIRON["POWER_SUPPLY_VOLTAGE_NOW"] / 10^6
+ voltage_min_design = ENVIRON["POWER_SUPPLY_VOLTAGE_MIN_DESIGN"] / 10^6
+
+ #printf "charge_now: %s\n", charge_now
+ #printf "charge_full: %s\n", charge_full
+ #printf "current_now: %s\n", current_now
+ #printf "energy_now: %s\n", energy_now
+ #printf "energy_full: %s\n", energy_full
+ #printf "energy_full: %s\n", ENVIRON["POWER_SUPPLY_ENERGY_FULL"]
+ #printf "energy_full: %s\n", ENVIRON["POWER_SUPPLY_ENERGY_FULL"] / 10^6
+ #printf "power_now: %s\n", power_now
+ #printf "voltage_now: %s\n", voltage_now
+
+ if (current_now == 0 && voltage_now != 0) {
+ current_now = power_now / voltage_now
+ }
+ if (power_now == 0) {
+ power_now = current_now * voltage_now
+ }
+ if (charge_now == 0 && voltage_min_design != 0) {
+ charge_now = energy_now / voltage_min_design
+ }
+ if (energy_now == 0) {
+ energy_now = charge_now * voltage_min_design
+ }
+ if (charge_full == 0 && voltage_min_design != 0) {
+ charge_full = energy_full / voltage_min_design
+ }
+ if (energy_full == 0) {
+ energy_full = charge_full * voltage_min_design
+ }
+
+ if (charge_now == 0 || charge_full == 0) {
+ die("unknown charge")
+ }
+
+ charge_ratio = charge_now / charge_full
+
+ out = out name
+ out = out sprintf(" %s", print_bar(charge_ratio))
+ out = out sprintf(" %d%", charge_ratio * 100)
+ out = out sprintf(" %.2f%s", charge_now, charge_unit)
+ if (current_now != 0) {
+ out = out sprintf("/%.1f%s", current_now, current_unit)
+ }
+ out = out sprintf(" %d%s", energy_full, energy_unit)
+ if (power_now != 0) {
+ out = out sprintf("/%.1f%s", power_now, power_unit)
+ }
+ if (current_now != 0) {
+ out = out sprintf(" %s", print_hm(charge_now / current_now))
+ }
+
+ out = out " " status
+
+ print out
+ }
+ '
+ )}
+
+ for uevent in /sys/class/power_supply/*/uevent; do
+ power_supply "$uevent" || :
+ done
+''