1 files changed, 63 insertions, 0 deletions
diff --git a/nss/coreconf/precommit.clang-format.sh b/nss/coreconf/precommit.clang-format.sh
new file mode 100755
index 0000000..b638b29
--- /dev/null
+++ b/nss/coreconf/precommit.clang-format.sh
@@ -0,0 +1,63 @@
+#!/usr/bin/env bash
+# This is a pre-commit hook for use with either mercurial or git.
+#
+# Install this by running the script with an argument of "install".
+#
+# All that does is add the following lines to .hg/hgrc:
+#
+# [hook]
+# pretxncommit.clang-format = [ ! -x ./coreconf/precommit.clang-format.sh ] || ./coreconf/precommit.clang-format.sh
+#
+# Or installs a symlink to .git/hooks/precommit:
+# $ ln -s ../../coreconf/precommit.clang-format.sh .git/hooks/pre-commit
+
+hash clang-format || exit 1
+[ "$(hg root 2>/dev/null)" = "$PWD" ] && hg=1 || hg=0
+[ "$(git rev-parse --show-toplevel 2>/dev/null)" = "$PWD" ] && git=1 || git=0
+
+if [ "$1" = "install" ]; then
+    if [ "$hg" -eq 1 ]; then
+        hgrc="$(hg root)"/.hg/hgrc
+        if ! grep -q '^pretxncommit.clang-format' "$hgrc"; then
+            echo '[hooks]' >> "$hgrc"
+            echo 'pretxncommit.clang-format = [ ! -x ./coreconf/precommit.clang-format.sh ] || ./coreconf/precommit.clang-format.sh' >> "$hgrc"
+            echo "Installed mercurial pretxncommit hook"
+            exit
+        fi
+    fi
+    if [ "$git" -eq 1 ]; then
+        hook="$(git rev-parse --show-toplevel)"/.git/hooks/pre-commit
+        if [ ! -e "$hook" ]; then
+            ln -s ../../coreconf/precommit.clang-format.sh "$hook"
+            echo "Installed git pre-commit hook"
+            exit
+        fi
+    fi
+    echo "Hook already installed, or not in NSS repo"
+    exit 2
+fi
+
+err=0
+files=()
+if [ "$hg" -eq 1 ]; then
+    files=($(hg status -m -a --rev tip^:tip | cut -f 2 -d ' ' -))
+fi
+if [ "$git" -eq 1 ]; then
+    files=($(git status --porcelain | sed '/^[MACU]/{s/..//;p;};/^R/{s/^.* -> //;p;};d'))
+fi
+tmp=$(mktemp)
+trap 'rm -f "$tmp"' ERR EXIT
+for f in "${files[@]}"; do
+    ext="${f##*.}"
+    if [ "$ext" = "c" -o "$ext" = "h" -o "$ext" = "cc" ]; then
+        [ "$hg" -eq 1 ] && hg cat -r tip "$f" > "$tmp"
+        [ "$git" -eq 1 ] && git show :"$f" > "$tmp"
+        if ! cat "$tmp" | clang-format -assume-filename="$f" | \
+            diff -q "$tmp" - >/dev/null; then
+            [ "$err" -eq 0 ] && echo "Formatting errors found in:" 1>&2
+            echo "  $f" 1>&2
+            err=1
+        fi
+    fi
+done
+exit "$err"