Add edda(1)

1 files changed, 61 insertions, 0 deletions

diff --git a/bin/edda b/bin/edda
new file mode 100755
index 00000000..154fb415
--- /dev/null
+++ b/bin/edda
@@ -0,0 +1,61 @@
+#!/usr/bin/env bash
+
+#
+# edda(1) -- Run ed(1) over multiple files, duplicating stdin. Example:
+#
+#   $ edda /etc/app.d/*.conf <<EOF
+#   ,s/foo/bar/g
+#   w
+#   EOF
+#
+# Author: Tom Ryder <tom@sanctum.geek.nz>
+# Copyright: 2015
+# License: Public domain
+#
+
+# Name self
+self=edda
+
+# Define usage function
+usage() {
+    printf 'USAGE: %s [OPTS] [--] FILE1 [FILE2...]\n' "$self"
+}
+
+# Parse options out, give help if necessary
+declare -a opts
+for arg ; do
+    case $arg in
+        --help|-h|-\?)
+            usage
+            exit
+            ;;
+        --)
+            shift
+            break
+            ;;
+        -*)
+            shift
+            opts=("${opts[@]}" "$arg")
+            ;;
+    esac
+done
+
+# Duplicate stdin into a file, which we'll remove on exit
+stdin=$(mktemp) || exit
+cleanup() {
+    rm -f "$stdin"
+}
+trap cleanup EXIT
+cat > "$stdin"
+
+# Need at least one file
+if ! (($#)) ; then
+    usage >&2
+    exit 1
+fi
+
+# Run ed(1) over each file with the options and stdin given
+for file ; do
+    ed "${opts[@]}" "$file" < "$stdin"
+done
+