misc/clang-format

   1 #!/bin/sh
   2 #
   3 # This script executes clang-format in the following order:
   4 #
   5 # 1. If environment variable CLANG_FORMAT is set, execute $CLANG_FORMAT.
   6 # 2. Otherwise, if <ccache-top-dir>/misc/.clang-format-exe exists, execute that
   7 #    program.
   8 # 3. Otherwise, download a statically linked clang-format executable, verify its
   9 #    integrity, place it in <ccache-top-dir>/misc/.clang-format-exe and execute
  10 #    it.
  11
  12 set -eu
  13
  14 if [ -n "${CLANG_FORMAT:-}" ]; then
  15     exec "$CLANG_FORMAT" "$@"
  16 fi
  17
  18 top_dir="$(dirname "$0")"
  19 clang_format_exe="$top_dir/.clang-format-exe"
  20 clang_format_version=10
  21 url_prefix="https://github.com/muttleyxd/clang-tools-static-binaries/releases/download/master-22538c65/clang-format-${clang_format_version}_"
  22
  23 if [ ! -x "$clang_format_exe" ]; then
  24     case "$(uname -s | tr '[:upper:]' '[:lower:]')" in
  25         *mingw*|*cygwin*|*msys*)
  26             url_suffix=windows-amd64.exe
  27             checksum=0b21dfb9041437eebcc44032096e4dfba9ee7b668ee6867ada71ea3541f7b09657ea592a5b1cf659bc9f8072bdc477dfc9da07b3edacb7834b70e68d7a3fc887
  28             ;;
  29         *darwin*)
  30             url_suffix=macosx-amd64
  31             checksum=8458753e13d3cbb7949a302beab812bed6d9dd9001c6e9618e5ba2e438233633ae04704a4e150aa2abfbaf103f1df4bc4a77b306012f44b37e543964bd527951
  32             ;;
  33         *linux*)
  34             url_suffix=linux-amd64
  35             checksum=3c4aaa90ad83313a1d7b350b30f9ad62578be73241f00f7d6e92838289e0b734fab80dee9dfcbd1546135bdb4e3601cfb2cf6b47360fba0bfc961e5a7cab2015
  36             ;;
  37         *)
  38             echo "Error: Please set CLANG_FORMAT to clang-format version $clang_format_version" >&2
  39             exit 1
  40             ;;
  41     esac
  42
  43     url="$url_prefix$url_suffix"
  44
  45     if command -v wget >/dev/null; then
  46         wget -qO "$clang_format_exe.tmp" "$url"
  47     elif command -v curl >/dev/null; then
  48         curl -so "$clang_format_exe.tmp" -L --retry 20 "$url"
  49     else
  50         echo "Error: Neither wget nor curl found" >&2
  51         exit 1
  52     fi
  53
  54     if ! command -v sha512sum >/dev/null; then
  55         echo "Warning: sha512sum not found, not verifying clang-format integrity" >&2
  56     elif ! echo "$checksum $clang_format_exe.tmp" | sha512sum --status -c; then
  57         echo "Error: Bad checksum of downloaded clang-format" >&2
  58         exit 1
  59     fi
  60
  61     chmod +x "$clang_format_exe.tmp"
  62     mv "$clang_format_exe.tmp" "$clang_format_exe"
  63 fi
  64
  65 exec "$clang_format_exe" "$@"