feat: parallelize clang-format-all.sh (#6281)

this can be enabled by setting the FAST environment variable to 1

scripts/clang-format-all.sh

@@ -1,10 +1,30 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 read -p "Are you sure you want to run clang-format on all source files? (y/n) " -n 1 -r
 echo
 if [[ $REPLY =~ ^[Yy]$ ]]; then
-    find src/ \( -iname "*.hpp" -o -iname "*.cpp" \) -exec clang-format -i {} \;
-    find tests/src/ \( -iname "*.hpp" -o -iname "*.cpp" \) -exec clang-format -i {} \;
-    find benchmarks/src/ \( -iname "*.hpp" -o -iname "*.cpp" \) -exec clang-format -i {} \;
-    find mocks/include/ \( -iname "*.hpp" -o -iname "*.cpp" \) -exec clang-format -i {} \;
+    if [ "$FAST" = "1" ]; then
+        if ! command -v parallel >/dev/null 2>&1; then
+            echo "Missing parallel command"
+            exit 1
+        fi
+
+        NUM_FORMAT_JOBS=${NUM_FORMAT_JOBS:-$(nproc)}
+
+        echo "Running clang-format with ${NUM_FORMAT_JOBS} jobs"
+
+        find . \( \
+            -regex '\./src/.*\.\(hpp\|cpp\)' -o \
+            -regex '\./tests/src/.*\.\(hpp\|cpp\)' -o \
+            -regex '\./benchmarks/src/.*\.\(hpp\|cpp\)' -o \
+            -regex '\./mocks/include/.*\.\(hpp\|cpp\)' \
+            \) | parallel --verbose --jobs "$NUM_FORMAT_JOBS" clang-format -i
+    else
+        find . \( \
+            -regex '\./src/.*\.\(hpp\|cpp\)' -o \
+            -regex '\./tests/src/.*\.\(hpp\|cpp\)' -o \
+            -regex '\./benchmarks/src/.*\.\(hpp\|cpp\)' -o \
+            -regex '\./mocks/include/.*\.\(hpp\|cpp\)' \
+            \) -exec clang-format -i {} \;
+    fi
 fi