l 5 q: get battery & brightness stuff from tv

1 files changed, 142 insertions, 41 deletions

diff --git a/lass/5pkgs/q/default.nix b/lass/5pkgs/q/default.nix
index 571932b1..2f41ac92 100644
--- a/lass/5pkgs/q/default.nix
+++ b/lass/5pkgs/q/default.nix
@@ -55,47 +55,143 @@ let
     fi
   '';
 
-  q-power_supply = ''
+  q-intel_backlight = ''
+    cd /sys/class/backlight/intel_backlight
+    </dev/null exec ${pkgs.gawk}/bin/awk '
+      END {
+        getline actual_brightness < "actual_brightness"
+        getline max_brightness < "max_brightness"
+        getline brightness < "brightness"
+        printf "intel_backlight %d%% %d/%d\n" \
+            , actual_brightness / max_brightness * 100 \
+            , actual_brightness \
+            , max_brightness
+      }
+    '
+  '';
+
+  q-power_supply = let
+    power_supply = pkgs.writeBash "power_supply" ''
+      set -efu
+      uevent=$1
+      eval "$(${pkgs.gnused}/bin/sed -n '
+        s/^\([A-Z_]\+=[0-9A-Za-z_-]*\)$/export \1/p
+      ' $uevent)"
+      case $POWER_SUPPLY_NAME in
+        AC)
+          exit # not battery
+          ;;
+      esac
+      exec </dev/null
+      exec ${pkgs.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(n, r, t1, t2, t_col) {
+          t1 = int(r * n)
+          t2 = n - t1
+          if (r >= .42)     t_col = "1;32"
+          else if (r >= 23) t_col = "1;33"
+          else if (r >= 11) t_col = "1;31"
+          else              t_col = "5;1;31"
+          return sgr(t_col) strdup("■", t1) sgr(";30") strdup("■", t2) sgr()
+        }
+
+        function sgr(p) {
+          return "\x1b[" p "m"
+        }
+
+        function strdup(s,n,t) {
+          t = sprintf("%"n"s","")
+          gsub(/ /,s,t)
+          return t
+        }
+
+        END {
+          name = ENVIRON["POWER_SUPPLY_NAME"]
+
+          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(10, 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))
+          }
+
+          print out
+        }
+      '
+    '';
+  in ''
     for uevent in /sys/class/power_supply/*/uevent; do
-      if test -f $uevent; then
-        eval "$(${pkgs.gnused}/bin/sed -n '
-          s/^\([A-Z_]\+=\)\(.*\)/\1'\'''\2'\'''/p
-        ' $uevent)"
-
-        if test "x''${POWER_SUPPLY_CHARGE_NOW-}" = x; then
-          continue
-        fi
-
-        charge_percentage=$(echo "
-          scale=2
-          $POWER_SUPPLY_CHARGE_NOW / $POWER_SUPPLY_CHARGE_FULL
-        " | ${pkgs.bc}/bin/bc)
-
-        lfc=$POWER_SUPPLY_CHARGE_FULL
-        rc=$POWER_SUPPLY_CHARGE_NOW
-        #rc=2800
-        N=78; N=76
-        N=10
-        n=$(echo $N-1 | ${pkgs.bc}/bin/bc)
-        centi=$(echo "$rc*100/$lfc" | ${pkgs.bc}/bin/bc)
-        deci=$(echo "$rc*$N/$lfc" | ${pkgs.bc}/bin/bc)
-        energy_evel=$(
-          echo -n '☳ ' # TRIGRAM FOR THUNDER
-          if   test $centi -ge 42; then echo -n ''
-          elif test $centi -ge 23; then echo -n ''
-          elif test $centi -ge 11; then echo -n ''
-          else                        echo -n ''; fi
-          for i in $(${pkgs.coreutils}/bin/seq 1 $deci); do
-            echo -n ■
-          done
-          echo -n ''
-          for i in $(${pkgs.coreutils}/bin/seq $deci $n); do
-            echo -n ■
-          done
-          echo '' $rc #/ $lfc
-        )
-        echo "$energy_evel $charge_percentage"
-      fi
+      ${power_supply} "$uevent" || :
     done
   '';
 
@@ -171,15 +267,20 @@ in
 pkgs.writeBashBin "q" ''
   set -eu
   export PATH=/var/empty
+  (${q-todo}) || :
+  if [ "$PWD" != "$HOME" ]; then
+    (HOME=$PWD; ${q-todo}) || :
+  fi
+  echo
   ${q-cal}
   echo
   ${q-isodate}
   (${q-gitdir}) &
+  (${q-intel_backlight}) &
   (${q-power_supply}) &
   (${q-virtualization}) &
   (${q-wireless}) &
   (${q-online}) &
   (${q-thermal_zone}) &
   wait
-  ${q-todo}
 ''