[libsoup] MSVC builds: Add a utility Python script for replacing strings

[Chun-wei Fan <fanchunwei src gnome org>]

commit d80106d8f55187f05a85667323178e80a509a321
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Thu Nov 26 20:51:41 2015 +0800

    MSVC builds: Add a utility Python script for replacing strings
    
    This is used to generate soup-version.h from soup-version.h.in, if we aren't
    distributing a pre-configured soup-version.h, using info from the property
    sheets which will also obtain version info during configure.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=758759

 build/win32/replace.py |  102 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 102 insertions(+), 0 deletions(-)
---
diff --git a/build/win32/replace.py b/build/win32/replace.py
new file mode 100644
index 0000000..69ef417
--- /dev/null
+++ b/build/win32/replace.py
@@ -0,0 +1,102 @@
+#!/usr/bin/python
+#
+# Simple utility script to manipulate
+# certain types of strings in a file
+
+# This can be used in various projects where
+# there is the need to replace strings in files,
+# and is copied from GLib's $(srcroot)/build/win32
+
+# Author: Fan, Chun-wei
+# Date: September 03, 2014
+
+import os
+import sys
+import re
+import string
+import argparse
+
+valid_actions = ['remove-prefix',
+                 'replace-var',
+                 'replace-str',
+                 'remove-str']
+
+def replace(src, dest, instring, outstring):
+    with open(src, 'r') as s:
+        with open(dest, 'w') as d:
+            for line in s:
+                i = line.replace(instring, outstring)
+                d.write(i)
+
+def check_required_args(args, params):
+    for param in params:
+        if getattr(args, param, None) is None:
+            raise SystemExit('%s: error: --%s argument is required' % (__file__, param))
+
+def warn_ignored_args(args, params):
+    for param in params:
+        if getattr(args, param, None) is not None:
+            print('%s: warning: --%s argument is ignored' % (__file__, param))
+
+def main(argv):
+
+    parser = argparse.ArgumentParser(description='Process strings in a file.')
+    parser.add_argument('-a',
+                        '--action',
+                        help='Action to carry out.  Can be one of:\n'
+                             'remove-prefix\n'
+                             'replace-var\n'
+                             'replace-str\n'
+                             'remove-str',
+                        choices=valid_actions)
+    parser.add_argument('-i', '--input', help='Input file')
+    parser.add_argument('-o', '--output', help='Output file')
+    parser.add_argument('--instring', help='String to replace or remove')
+    parser.add_argument('--var', help='Autotools variable name to replace')
+    parser.add_argument('--outstring',
+                        help='New String to replace specified string or variable')
+    parser.add_argument('--removeprefix', help='Prefix of string to remove')
+
+    args = parser.parse_args()
+
+    input_string = ''
+    output_string = ''
+
+    # We must have action, input, output for all operations
+    check_required_args(args, ['action','input','output'])
+
+    # Build the arguments by the operation that is to be done,
+    # to be fed into replace()
+
+    # Get rid of prefixes from a string
+    if args.action == 'remove-prefix':
+        check_required_args(args, ['instring','removeprefix'])
+        warn_ignored_args(args, ['outstring','var'])
+        input_string = args.removeprefix + args.instring
+        output_string = args.instring
+
+    # Replace an m4-style variable (those surrounded by @...@)
+    if args.action == 'replace-var':
+        check_required_args(args, ['var','outstring'])
+        warn_ignored_args(args, ['instring','removeprefix'])
+        input_string = '@' + args.var + '@'
+        output_string = args.outstring
+
+    # Replace a string
+    if args.action == 'replace-str':
+        check_required_args(args, ['instring','outstring'])
+        warn_ignored_args(args, ['var','removeprefix'])
+        input_string = args.instring
+        output_string = args.outstring
+
+    # Remove a string
+    if args.action == 'remove-str':
+        check_required_args(args, ['instring'])
+        warn_ignored_args(args, ['var','outstring','removeprefix'])
+        input_string = args.instring
+        output_string = ''
+
+    replace(args.input, args.output, input_string, output_string)
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv))