Add step summary output to CI builds, with failure logs. (qmk#20288)

.github/workflows/ci_builds.yml

@@ -39,7 +39,11 @@ jobs:
     - name: Run `qmk mass-compile` (keymap ${{ matrix.keymap }})
       run: |
         export NCPUS=$(nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || getconf _NPROCESSORS_ONLN 2>/dev/null)
-        qmk mass-compile -t -j $NCPUS -km ${{ matrix.keymap }}
+        qmk mass-compile -t -j $NCPUS -km ${{ matrix.keymap }} -e DUMP_CI_METADATA=yes
+        # Generate the step summary markdown
+        ./util/ci/generate_failure_markdown.sh > $GITHUB_STEP_SUMMARY
+        # Truncate to a maximum of 1MB to deal with GitHub workflow limit
+        truncate --size='<960K' $GITHUB_STEP_SUMMARY
 
     - name: 'Upload artifacts'
       uses: actions/upload-artifact@v3

builddefs/build_keyboard.mk

@@ -29,6 +29,11 @@ KEYBOARD_FILESAFE := $(subst /,_,$(KEYBOARD))
 TARGET ?= $(KEYBOARD_FILESAFE)_$(KEYMAP)
 KEYBOARD_OUTPUT := $(BUILD_DIR)/obj_$(KEYBOARD_FILESAFE)
 
+ifeq ($(strip $(DUMP_CI_METADATA)),yes)
+    $(info CI Metadata: KEYBOARD=$(KEYBOARD))
+    $(info CI Metadata: KEYMAP=$(KEYMAP))
+endif
+
 # Force expansion
 TARGET := $(TARGET)
 

util/ci/generate_failure_markdown.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+set -e
+
+this_script="$(realpath "${BASH_SOURCE[0]}")"
+script_dir="$(realpath "$(dirname "$this_script")")"
+qmk_firmware_dir="$(realpath "$script_dir/../../")"
+
+dump_failure_info() {
+    local failure_file="$1"
+    local keyboard=$(cat "$failure_file" | grep 'CI Metadata: KEYBOARD=' | cut -d= -f2)
+    local keymap=$(cat "$failure_file" | grep 'CI Metadata: KEYMAP=' | cut -d= -f2)
+    echo "## ${keyboard}:${keymap}"
+    echo "\`\`\`"
+    cat "$failure_file" | sed -e $'s/\x1b\[[0-9;]*m//g' | grep -v "CI Metadata:" | grep -vP "(Entering|Leaving) directory"
+    echo "\`\`\`"
+}
+
+for failure_file in $(find "$qmk_firmware_dir/.build" -name 'failed.log.*' | sort); do
+    dump_failure_info "$failure_file"
+done