security/nss/coreconf/precommit.clang-format.sh

   1 #!/usr/bin/env bash
   2 # This is a pre-commit hook for use with either mercurial or git.
   3 #
   4 # Install this by running the script with an argument of "install".
   5 #
   6 # All that does is add the following lines to .hg/hgrc:
   7 #
   8 # [hook]
   9 # pretxncommit.clang-format = [ ! -x ./coreconf/precommit.clang-format.sh ] || ./coreconf/precommit.clang-format.sh
  10 #
  11 # Or installs a symlink to .git/hooks/precommit:
  12 # $ ln -s ../../coreconf/precommit.clang-format.sh .git/hooks/pre-commit
  13
  14 hash clang-format || exit 1
  15 [ "$(hg root 2>/dev/null)" = "$PWD" ] && hg=1 || hg=0
  16 [ "$(git rev-parse --show-toplevel 2>/dev/null)" = "$PWD" ] && git=1 || git=0
  17
  18 if [ "$1" = "install" ]; then
  19     if [ "$hg" -eq 1 ]; then
  20         hgrc="$(hg root)"/.hg/hgrc
  21         if ! grep -q '^pretxncommit.clang-format' "$hgrc"; then
  22             echo '[hooks]' >> "$hgrc"
  23             echo 'pretxncommit.clang-format = [ ! -x ./coreconf/precommit.clang-format.sh ] || ./coreconf/precommit.clang-format.sh' >> "$hgrc"
  24             echo "Installed mercurial pretxncommit hook"
  25             exit
  26         fi
  27     fi
  28     if [ "$git" -eq 1 ]; then
  29         hook="$(git rev-parse --show-toplevel)"/.git/hooks/pre-commit
  30         if [ ! -e "$hook" ]; then
  31             ln -s ../../coreconf/precommit.clang-format.sh "$hook"
  32             echo "Installed git pre-commit hook"
  33             exit
  34         fi
  35     fi
  36     echo "Hook already installed, or not in NSS repo"
  37     exit 2
  38 fi
  39
  40 err=0
  41 files=()
  42 if [ "$hg" -eq 1 ]; then
  43     files=($(hg status -m -a --rev tip^:tip | cut -f 2 -d ' ' -))
  44 fi
  45 if [ "$git" -eq 1 ]; then
  46     files=($(git status --porcelain | sed '/^[MACU]/{s/..//;p;};/^R/{s/^.* -> //;p;};d'))
  47 fi
  48 tmp=$(mktemp)
  49 trap 'rm -f "$tmp"' ERR EXIT
  50 for f in "${files[@]}"; do
  51     ext="${f##*.}"
  52     if [ "$ext" = "c" -o "$ext" = "h" -o "$ext" = "cc" ]; then
  53         [ "$hg" -eq 1 ] && hg cat -r tip "$f" > "$tmp"
  54         [ "$git" -eq 1 ] && git show :"$f" > "$tmp"
  55         if ! cat "$tmp" | clang-format -assume-filename="$f" | \
  56             diff -q "$tmp" - >/dev/null; then
  57             [ "$err" -eq 0 ] && echo "Formatting errors found in:" 1>&2
  58             echo "  $f" 1>&2
  59             err=1
  60         fi
  61     fi
  62 done
  63 exit "$err"