From 0c22c9ffb3aee4494a9221537b984bc3419f320e Mon Sep 17 00:00:00 2001
From: rusefillc <sdfsdfqsf2334234234>
Date: Tue, 4 Jan 2022 11:51:06 -0500
Subject: [PATCH] GHA execution throttling #3739

---
 .github/workflows/build-firmware.yaml | 15 +++++++++++++++
 misc/actions/execution-throttle.sh    | 23 +++++++++++++++++++++++
 2 files changed, 38 insertions(+)
 create mode 100644 misc/actions/execution-throttle.sh

diff --git a/.github/workflows/build-firmware.yaml b/.github/workflows/build-firmware.yaml
index 603db070c3..7ba45f6d55 100644
--- a/.github/workflows/build-firmware.yaml
+++ b/.github/workflows/build-firmware.yaml
@@ -108,6 +108,7 @@ jobs:
           - build-target: mre_f4_recovery
             folder: microrusefi
             ini-file: rusefi_mre_f4.ini
+            skip-rate: 90
 
           - build-target: mre_f4_hardware_QC_special_build
             folder: microrusefi
@@ -117,6 +118,7 @@ jobs:
             folder: microrusefi
             ini-file: rusefi_mre_f7.ini
             console-settings: firmware/config/boards/nucleo_f767/rusefi_console_properties.xml
+            skip-rate: 90
 
           - build-target: prometheus_405
             folder: prometheus
@@ -125,6 +127,7 @@ jobs:
           - build-target: prometheus_469
             folder: prometheus
             ini-file: rusefi_prometheus_469.ini
+            skip-rate: 50
 
           - build-target: proteus_f4
             folder: proteus
@@ -133,6 +136,7 @@ jobs:
           - build-target: proteus_f4_hardware_QC_special_build
             folder: proteus
             ini-file: rusefi_proteus_f4.ini
+            skip-rate: 90
 
           - build-target: proteus_f7
             folder: proteus
@@ -149,17 +153,20 @@ jobs:
           - build-target: proteus_legacy
             folder: proteus
             ini-file: rusefi_proteus_f7.ini
+            skip-rate: 50
 
           - build-target: stm32f767_nucleo
             folder: nucleo_f767
             ini-file: no
             console-settings: firmware/config/boards/nucleo_f767/rusefi_console_properties.xml
             skip-config: yes
+            skip-rate: 50
 
           - build-target: stm32h743_nucleo
             folder: nucleo_h743
             ini-file: no
             skip-config: yes
+            skip-rate: 50
 
           - build-target: subaru_eg33_f7
             folder: subaru_eg33
@@ -168,17 +175,25 @@ jobs:
           - build-target: atlas
             folder: atlas
             ini-file: rusefi_atlas.ini
+            skip-rate: 90
 
     steps:
+    - id: throttle
+      name: Execution throttle early exit
+      run: bash misc/actions/execution-throttle.sh ${{ matrix.skip-rate }}
+
     - uses: actions/checkout@v1
+      if: steps.throttle.conclusion == 'success'
       with:
         submodules: recursive
 
     - uses: actions/setup-java@v1
+      if: steps.throttle.conclusion == 'success'
       with:
         java-version: '8'
 
     - name: Install multilib, mingw, sshpass and mtools
+      if: steps.throttle.conclusion == 'success'
       run: |
         sudo apt-get update
         sudo apt-get install gcc-multilib g++-multilib g++-mingw-w64 gcc-mingw-w64 sshpass mtools
diff --git a/misc/actions/execution-throttle.sh b/misc/actions/execution-throttle.sh
new file mode 100644
index 0000000000..df6611f0d2
--- /dev/null
+++ b/misc/actions/execution-throttle.sh
@@ -0,0 +1,23 @@
+#!/bin/bash
+
+#
+# we use this script to reduce github actions load by executing some tasks less frequent than always
+# param: THRESHOLD, rate of SKIPPING task, from 0 to 100. No skipping if zero, always skipping if 100.
+#
+
+THRESHOLD=$1
+if [ -z $THRESHOLD ] ; then
+  echo "Throttle threshold not specified, allowing always"
+  exit 0
+fi
+
+RANDOM100=$(($RANDOM % 100))
+msg="Random ${RANDOM100} while threshold $THRESHOLD:"
+
+if (( ${RANDOM100} > $THRESHOLD )); then
+  echo "$msg Allowing"
+  exit 0
+else
+  echo "$msg Not this time, maybe next time"
+  exit -1
+fi