Move copyright code from gdbarch.py to new file

This moves the copyright code from gdbarch.py to a new Python source
file, gdbcopyright.py.  The function in this file will find the
copyright dates by scanning the calling script.  This will be reused
in a future patch.

This involved minor changes to the output of gdbarch.py.  Also, I've
updated copyright.py to remove the reference to gdbarch.sh.  We don't
need to mention gdbarch.py there, either.

1 files changed, 52 insertions, 0 deletions

diff --git a/gdb/gdbcopyright.py b/gdb/gdbcopyright.py
new file mode 100644
index 0000000..9526eac
--- /dev/null
+++ b/gdb/gdbcopyright.py
@@ -0,0 +1,52 @@
+# Copyright constant for Python code to use.
+#
+# Copyright (C) 2022 Free Software Foundation, Inc.
+#
+# This file is part of GDB.
+#
+# This program 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 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+
+def copyright(tool, description):
+    # Search the tool source itself for the correct copyright years.
+    with open(tool, 'r') as f:
+        for line in f:
+            if line.startswith('# Copyright (C) '):
+                dateline = line[1:].strip()
+                break
+    return f"""/* *INDENT-OFF* */ /* THIS FILE IS GENERATED -*- buffer-read-only: t -*- */
+/* vi:set ro: */
+
+/* {description}
+
+   {dateline}
+
+   This file is part of GDB.
+
+   This program 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 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* To regenerate this file, run:
+   ./{tool}
+*/
+"""