[PATCH 4/9] Add replace-spdx-license.sh script

[Dodji Seketeli]

This script is to replace an SPDX license ID by another one.
I.e, it's to perform an actual re-licensing of a given file.

A way to use the script is this:

    replace-spdx-license.sh  --from LGPL-3.0-or-later \
			      --to  "Apache-2.0 WITH LLVM-exception" \
			      some-file-to-relicense.cc

	* relicensing-scripts/replace-spdx-license.sh: New script.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>
---
 relicensing-scripts/replace-spdx-license.sh | 75 +++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100755 relicensing-scripts/replace-spdx-license.sh

diff --git a/relicensing-scripts/replace-spdx-license.sh b/relicensing-scripts/replace-spdx-license.sh
new file mode 100755
index 0000000..5fdbc91
--- /dev/null
+++ b/relicensing-scripts/replace-spdx-license.sh
@@ -0,0 +1,75 @@
+#!/bin/sh
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+# Author: Dodji Seketeli <dodji@redhat.com>
+
+from_license_id=
+to_license_id=
+input_file=
+prog=$0
+
+display_usage()
+{
+    echo "$prog: [options] --from <from-spdx-license-id> --to <to-spdx-license-id> <file>"
+    echo "  where options can be:"
+    echo "   -h|--h		display this help"
+}
+
+main()
+{
+    header=$(head --lines=5 $input_file | grep "SPDX-License-Identifier:")
+    if test "x$header" != x; then
+	license=$(echo "$header" | sed -r "s/^.*(SPDX-License-Identifier:)[ 	]*([^*/]+).*$/\2/")
+    fi
+
+    if test "x$license" != x -a "$license" = "$from_license_id"; then
+	sed -i -r "s/$from_license_id/$to_license_id/" $input_file
+	exit 0
+    fi
+
+    exit 1
+}
+
+# This program takes at least 5 arguments
+if test $# -lt 5; then
+    display_usage
+    exit 1
+fi
+
+# Parse parameters
+while test $# -gt 1; do
+    case "$1" in
+	-h|--h)
+	    display_usage
+	    exit 1
+	    ;;
+
+	-f|--from)
+	    from_license_id=$2
+	    shift
+	    ;;
+
+	-t|--to)
+	    to_license_id=$2
+	    shift
+	    ;;
+
+	-*)
+	    display_usage
+	    exit 1
+	    ;;
+
+	*)
+	    input_file="$1"
+	    ;;
+    esac
+    shift
+done
+
+if test $# -lt 1; then
+    display_usage
+    exit 1
+fi
+
+input_file=$1
+
+main
-- 
1.8.3.1


-- 
		Dodji