Scatter the useful files into subdirectories by theme.

[cfd] / build / confsubst

diff --git a/build/confsubst b/build/confsubst
new file mode 100755 (executable)
index 0000000..f9ba37b
--- /dev/null
+++ b/build/confsubst
@@ -0,0 +1,87 @@
+#! /bin/sh
+### -*-sh-*-
+###
+### Make autoconf-like substitutions in files
+###
+### (c) 2008 Mark Wooding
+###
+
+###----- Licensing notice ---------------------------------------------------
+###
+### This file is part of the Common Files Distribution (`common').
+###
+### `Common' is free software; you can redistribute it and/or modify
+### it under the terms of the GNU General Public License as published by
+### the Free Software Foundation; either version 2 of the License, or
+### (at your option) any later version.
+###
+### `Common' is distributed in the hope that it will be useful,
+### but WITHOUT ANY WARRANTY; without even the implied warranty of
+### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+### GNU General Public License for more details.
+###
+### You should have received a copy of the GNU General Public License
+### along with `common'; if not, write to the Free Software Foundation,
+### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+set -e
+VERSION="@VERSION@"
+
+###--------------------------------------------------------------------------
+### Parse command line arguments.
+
+while [ $# -gt 0 ]; do
+  case $1 in
+    -h | --h | --he | --hel | --help)
+      cat <<EOF
+Usage: confsubst FILE TAG=VALUE...
+
+Replaces occurrences of @TAG@ in FILE with VALUE, and writes the result to
+standard output.
+EOF
+      exit 0
+      ;;
+    -v | --v | --ve | --ver | --vers | --versi | --versio | --version)
+      echo "confsubst: Common Files Distribution version $VERSION"
+      exit 0
+      ;;
+    --)
+      shift
+      break
+      ;;
+    -)
+      break
+      ;;
+    -*)
+      echo "confsubst: unknown option \`$1'" >&2
+      exit 1
+      ;;
+    *)
+      break
+      ;;
+  esac
+  shift
+done
+
+if [ $# -lt 1 ]; then
+  echo >&2 "Usage: confsubst FILE TAG=VALUE..."
+  exit 1
+fi
+file=$1; shift
+
+###--------------------------------------------------------------------------
+### Main code.
+
+subst=""
+for fixup; do
+  case "$fixup" in
+    *?=*) ;;
+    *) echo >&2 "$0: bad substitution: $fixup"; exit 1 ;;
+  esac
+  tag=${fixup%%=*} value=${fixup#*=}
+  subst="$subst s\a@$tag@\a$value\ag;"
+done
+
+sed "$subst" $file || exit $?
+
+###----- That's all, folks --------------------------------------------------