Initial commit

tools/clang-format/clang-format.yml

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+BasedOnStyle: LLVM
+
+# Use larger indentation
+IndentWidth: 4

tools/clang-format/use-clang-format.sh

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+#!/bin/bash
+
+usage=\
+"Usage: use-clang-format.sh git
+  or:  use-clang-format.sh files FILES...
+  or:  use-clang-format.sh raw ARGUMENTS...
+In the 1st form, format all files that have changed since last git commit.
+In the 2nd form, format all FILES, treating directories recursively.
+In the 3rd form, run \`clang-format --style=<style> ARGUMENTS...\`.
+
+Environment variables:
+  CLANG_FORMAT       clang-format executable
+  CLANG_FORMAT_DIFF  clang-format-diff script"
+
+rsrc="$(dirname "$(realpath "${BASH_SOURCE[0]}")")"
+source "$rsrc/../bashlib.sh"
+
+case "$1" in
+    git )
+        find_cmd CLANG_FORMAT_DIFF \
+            clang-format-diff-13 \
+            clang-format-diff \
+            clang-format-diff.py
+        ;;
+    files | raw )
+        find_cmd CLANG_FORMAT \
+            clang-format-13 \
+            clang-format
+        ;;
+    -h | --help | '' )
+        echo "$usage"
+        exit
+        ;;
+    * )
+        fail "Unknown option '$1'"
+        ;;
+esac
+
+# Generate style argument
+style=''
+while IFS='' read line; do
+    [ -z "$line" ] && continue
+    [ "${line:0:1}" = '#' ] && continue
+    [ -n "$style" ] && style+=', '
+    style+="$line"
+done < "$rsrc/clang-format.yml"
+style="{$style}" # Not typo
+
+case "$1" in
+    git )
+        unstaged_changes="`git diff --name-only`"
+        if [ -n "$unstaged_changes" ]; then
+            fail "Refusing to operate in git repository with unstaged changes:
+$unstaged_changes"
+        fi
+
+        git diff -U0 --no-color --relative HEAD \
+            '*.cpp' \
+            '*.h' \
+            '*.inl' \
+        | command "$CLANG_FORMAT_DIFF" -p1 -style="$style" -i --verbose
+        exit_code="$?"
+        git add "$root_dir"
+        exit "$exit_code"
+        ;;
+
+    raw )
+        command "$CLANG_FORMAT" -style="$style" "$@"
+        ;;
+
+    files )
+        files=()
+
+        for input in "${@:2}"; do
+            if [ -d "$input" ]; then
+                readarray -d '' current_files < <(
+                    find "$input" \
+                        \( -name '*.cpp' -o -name '*.h' -o -name '*.inl' \) \
+                        -type f \
+                        -print0 \
+                )
+
+                [ "${#current_files[@]}" -eq 0 ] \
+                    && fail "No suitable files found in directory $input"
+
+                files+=("${current_files[@]}")
+            else
+                case "$input" in
+                    *.cpp | *.h | *.inl )
+                        files+=("$input")
+                        ;;
+                    * )
+                        error "Refusing to format file '$input': `
+                            `only .cpp, .h and .inl supported"
+                        ;;
+                esac
+            fi
+        done
+
+        [ "${#files[@]}" -eq 0 ] && fail "No files to format"
+
+        command "$CLANG_FORMAT" -style="$style" -i --verbose "${files[@]}"
+        ;;
+esac