CI: Speed up static checks by checking only changed files

- file_format, header_guards and clang-format benefit from this short list.
- dotnet-format, Python and JS checks don't, but they're only relevant for
  PRs changing a specific set of files, so we skip them when those files
  aren't modified.

The logic to get changed files only works reliably for:
- Pull request events
- Non-force pushed push events

So when force pushing a branch in your fork, or creating a new branch,
it will still scan all files as fallback.

Upgraded CI runner to Ubuntu 22.04 so we get clang-format 14 out of the box,
so we don't need to install a custom version (saves ~15 s). We also cache
the APT dependencies to speed up the build and avoid flaky Ubuntu/Microsoft
repos.

(cherry picked from commit 068f89307245d062bf2bf995de3726e33faef5d8)

3 files changed, 37 insertions, 16 deletions

diff --git a/misc/scripts/clang_format.sh b/misc/scripts/clang_format.sh
index 318a78b865..74a8e1a8a3 100755
--- a/misc/scripts/clang_format.sh
+++ b/misc/scripts/clang_format.sh
@@ -5,15 +5,22 @@
 
 set -uo pipefail
 
-# Loops through all code files tracked by Git.
-git ls-files -- '*.c' '*.h' '*.cpp' '*.hpp' '*.cc' '*.hh' '*.cxx' '*.m' '*.mm' '*.inc' '*.java' '*.glsl' \
+if [ $# -eq 0 ]; then
+    # Loop through all code files tracked by Git.
+    files=$(git ls-files -- '*.c' '*.h' '*.cpp' '*.hpp' '*.cc' '*.hh' '*.cxx' '*.m' '*.mm' '*.inc' '*.java' '*.glsl' \
                 ':!:.git/*' ':!:thirdparty/*' ':!:*/thirdparty/*' ':!:platform/android/java/lib/src/com/google/*' \
-                ':!:*-so_wrap.*' ':!:tests/python_build/*' |
-while read -r f; do
-    # Run clang-format.
-    clang-format --Wno-error=unknown -i "$f"
+                ':!:*-so_wrap.*' ':!:tests/python_build/*')
+else
+    # $1 should be a file listing file paths to process. Used in CI.
+    files=$(cat "$1" | grep -v "thirdparty/" | grep -E "\.(c|h|cpp|hpp|cc|hh|cxx|m|mm|inc|java|glsl)$" | grep -v "platform/android/java/lib/src/com/google/" | grep -v "\-so_wrap\." | grep -v "tests/python_build/")
+fi
+
+if [ ! -z "$files" ]; then
+    clang-format --Wno-error=unknown -i $files
+fi
 
-    # Fix copyright headers, but not all files get them.
+# Fix copyright headers, but not all files get them.
+for f in $files; do
     if [[ "$f" == *"inc" ]]; then
         continue
     elif [[ "$f" == *"glsl" ]]; then
diff --git a/misc/scripts/file_format.sh b/misc/scripts/file_format.sh
index f394c4ad3f..94a3affbd7 100755
--- a/misc/scripts/file_format.sh
+++ b/misc/scripts/file_format.sh
@@ -7,14 +7,20 @@
 # We need dos2unix and isutf8.
 if [ ! -x "$(command -v dos2unix)" -o ! -x "$(command -v isutf8)" ]; then
     printf "Install 'dos2unix' and 'isutf8' (moreutils package) to use this script.\n"
+    exit 1
 fi
 
 set -uo pipefail
-IFS=$'\n\t'
 
-# Loops through all text files tracked by Git.
-git grep -zIl '' |
-while IFS= read -rd '' f; do
+if [ $# -eq 0 ]; then
+    # Loop through all code files tracked by Git.
+    mapfile -d '' files < <(git grep -zIl '')
+else
+    # $1 should be a file listing file paths to process. Used in CI.
+    mapfile -d ' ' < <(cat "$1")
+fi
+
+for f in "${files[@]}"; do
     # Exclude some types of files.
     if [[ "$f" == *"csproj" ]]; then
         continue
diff --git a/misc/scripts/header_guards.sh b/misc/scripts/header_guards.sh
index a063ff4b9c..1f8aa6151c 100755
--- a/misc/scripts/header_guards.sh
+++ b/misc/scripts/header_guards.sh
@@ -5,9 +5,17 @@ if [ ! -f "version.py" ]; then
   echo "Some of the paths checks may not work as intended from a different folder."
 fi
 
+if [ $# -eq 0 ]; then
+    # Loop through all code files tracked by Git.
+    files=$(find -name "thirdparty" -prune -o -name "*.h" -print | sed "s@^\./@@g")
+else
+    # $1 should be a file listing file paths to process. Used in CI.
+    files=$(cat "$1" | grep -v "thirdparty/" | grep -E "\.h$" | sed "s@^\./@@g")
+fi
+
 files_invalid_guard=""
 
-for file in $(find -name "thirdparty" -prune -o -name "*.h" -print); do
+for file in $files; do
   # Skip *.gen.h and *-so_wrap.h, they're generated.
   if [[ "$file" == *".gen.h" || "$file" == *"-so_wrap.h" ]]; then continue; fi
   # Has important define before normal header guards.
@@ -20,16 +28,16 @@ for file in $(find -name "thirdparty" -prune -o -name "*.h" -print); do
   # Add custom prefix or suffix for generic filenames with a well-defined namespace.
 
   prefix=
-  if [[ "$file" == "./modules/"*"/register_types.h" ]]; then
+  if [[ "$file" == "modules/"*"/register_types.h" ]]; then
     module=$(echo $file | sed "s@.*modules/\([^/]*\).*@\1@")
     prefix="${module^^}_"
   fi
-  if [[ "$file" == "./platform/"*"/api/api.h" || "$file" == "./platform/"*"/export/"* ]]; then
+  if [[ "$file" == "platform/"*"/api/api.h" || "$file" == "platform/"*"/export/"* ]]; then
     platform=$(echo $file | sed "s@.*platform/\([^/]*\).*@\1@")
     prefix="${platform^^}_"
   fi
-  if [[ "$file" == "./modules/mono/utils/"* && "$bname" != *"mono"* ]]; then prefix="MONO_"; fi
-  if [[ "$file" == "./servers/rendering/storage/utilities.h" ]]; then prefix="RENDERER_"; fi
+  if [[ "$file" == "modules/mono/utils/"* && "$bname" != *"mono"* ]]; then prefix="MONO_"; fi
+  if [[ "$file" == "servers/rendering/storage/utilities.h" ]]; then prefix="RENDERER_"; fi
 
   suffix=
   if [[ "$file" == *"dummy"* && "$bname" != *"dummy"* ]]; then suffix="_DUMMY"; fi