Add scripts to check/fix copyright headers.

 * Add a script that will report files without copyright headers.
   (see hasCopyright.sh for sample usage).
 * Add a script that will add a header to files.
   (see fixCopyright.sh for sample usage).

Reviewed-by: Roberto Raggi

scripts/fixCopyright.sh

+#!/bin/sh
+
+# Prepend a copyright header to all files given on the command line.
+# Sample usage:
+# find . -type f -name \*.cpp -o -name \*.h | \
+#     xargs ~/bin/hasCopyright.sh | grep ": NO COPYRIGHT" | grep "^./src/" | \
+#     cut -d ':' -f1 | xargs ~/bin/fixCopyright.sh /tmp/copyright.txt
+
+COPYRIGHT_HEADER=$1
+
+test -f "$COPYRIGHT_HEADER" || exit 16
+shift
+
+echo "Using $COPYRIGHT_HEADER..."
+
+WORKDIR=`mktemp -d`
+test -d "$WORKDIR" || exit 17
+
+for i in $@ ; do
+    echo -n "Fixing $i..."
+    if test -f "$i" && test -s "$i" ; then
+        BASENAME=`basename "$i"`
+        TMP_NAME="$WORKDIR/$BASENAME"
+        sed '/./,$!d' "$i" > "$TMP_NAME" # remove leading empty lines
+        cat "$COPYRIGHT_HEADER" "$TMP_NAME" > "$i"
+        rm "$TMP_NAME"
+    fi
+    echo done.
+done
+
+rmdir "$WORKDIR"

scripts/hasCopyright.sh

+#!/bin/sh
+
+# Scan files given on the command line for a copyright header.
+# Only the first 15 lines will be examined and must contain the
+# string 'Copyright'.
+#
+# Sample usage:
+# find . -type f -name \*.cpp -o -name \*.h | xargs ~/bin/hasCopyright.sh
+
+for i in $@ ; do
+    if test -f "$i" && test -s "$i" ; then
+        if head -n 15 "$i" | grep Copyright > /dev/null 2>&1 ; then
+            echo "$i: Copyright."
+        else
+           echo "$i: NO COPYRIGHT."
+        fi
+    fi
+done