Add copyright updating script

1 files changed, 78 insertions, 0 deletions

diff --git a/copyright b/copyright
new file mode 100755
index 0000000..b9b5aa0
--- /dev/null
+++ b/copyright
@@ -0,0 +1,78 @@
+#! /usr/bin/env bash
+
+# Update copyright in a git project. The fact that it is a git project is
+# used to avoid submodules as well as generated files. In other words, only
+# files tracked by git are updated.
+#
+# Run from the project root.
+#
+usage="usage: copyright <old-year> <new-year>"
+
+owd=`pwd`
+trap "{ cd $owd; exit 1; }" ERR
+set -o errtrace # Trap in functions.
+
+function info () { echo "$*" 1>&2; }
+function error () { info "$*"; exit 1; }
+
+while [ $# -gt 0 ]; do
+  case $1 in
+    *)
+      break
+      ;;
+  esac
+done
+
+old="$1"
+new="$2"
+
+if [ -z "$old" -o -z "$new" ]; then
+  error "$usage"
+fi
+
+# Load submodules into a map.
+#
+declare -A submodules
+for s in $(git submodule foreach -q 'echo $path'); do
+  submodules["$s"]=true
+done
+
+# Get the list of files.
+#
+files=()
+while IFS= read -r -d '' f; do
+
+  if [ "${submodules["$f"]}" = true ]; then
+    info "skipping submodule $f"
+    continue
+  fi
+
+  # Exclude symlinks (normally point into a submodule).
+  #
+  if test -L "$f"; then
+    info "skipping symlink $f"
+    continue
+  fi
+
+  files+=("$f")
+
+done < <(git ls-tree -r HEAD -z --name-only )
+
+# Process each file.
+#
+for f in "${files[@]}"; do
+
+  info "processing $f"
+
+  sed -i -re "s/(Copyright \(c\) [0-9]+)-$old (Code Synthesis)/\1-$new \2/" "$f"
+
+  # Grep for matching copyrights that didn't end with $old (or have other
+  # discrepancies like single year only, etc).
+  #
+  grep -vE "Copyright \(c\) [0-9]+-$new (Code Synthesis)" "$f" | \
+    grep -iE --color=auto "Copyright.*Code Synthesis" || true
+
+  # Grep for the old year (for review).
+  #
+  grep --color=auto --with-filename "$old" "$f" || true
+done