add py-replace

README.md

@@ -22,7 +22,7 @@ python3 -m build
 ```
 
 5) Upload the distribution packages with twine. For the username, use `__token__`. For the password, use a 
-[test.pypi.org API token](https://test.pypi.org/manage/account/#api-tokens):
+   [test.pypi.org API token](https://test.pypi.org/manage/account/#api-tokens):
 
 ```shell
 python3 -m twine upload --repository testpypi dist/*

setup.cfg

@@ -3,7 +3,7 @@
 
 [metadata]
 name = py-regex-replace
-version = 0.0.1
+version = 0.0.2
 author = Daniel Langbein
 author_email = daniel@systemli.org
 description = perform regex-replacement on stdin and output result to stdout
@@ -33,3 +33,4 @@ where = src
 ; https://setuptools.readthedocs.io/en/latest/userguide/entry_point.html
 console_scripts=
     py-regex-replace = py_regex_replace.main:main
+    py-replace = py_replace.main:main

src/py_replace/main.py

@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+import argparse
+import sys
+
+
+def main():
+    text, repl, string, count = parse_args()
+
+    occurrences = string.count(text)
+    if occurrences != count:
+        print(f'[ERROR] Expected {count} occurrences of text in string, but got {occurrences}.')
+        exit(1)
+
+    string = string.replace(text, repl)
+
+    print(string, end='')
+
+
+def parse_args():
+    parser = argparse.ArgumentParser(prog='py-regex-replace')
+
+    parser.add_argument('--text', '-t',
+                        help='text to replace',
+                        required=True, type=str)
+    parser.add_argument('--repl', '-r',
+                        help='replacement',
+                        required=True, type=str)
+    parser.add_argument('--count', '-c',
+                        help='expected count of text in string',
+                        default=1, type=int)
+
+    args = parser.parse_args()
+
+    string = sys.stdin.read()
+    if len(string) == 0:
+        print('[WARNING] The given string is empty.', file=sys.stderr)
+
+    return args.text, args.repl, string, args.count
+
+
+if __name__ == '__main__':
+    main()

test/test_multiline_pattern.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env sh
+
+string='alpha = a
+beta = b
+Exec = foo bar baz
+end = EOF'
+pattern='= b\nExec ='
+repl='='
+
+string="$(printf '%s' "${string}" | ../src/py_regex_replace/main.py -p "${pattern}" -r "${repl}" -c 1)"
+
+printf 'RESULT>>>\n%s\n<<<RESULT\n' "${string}"

test/test_multiline_replacement.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env sh
+
+string='alpha = a
+beta = b
+Exec = foo bar baz
+end = EOF'
+pattern='foo bar baz'
+repl='foo bar baz\n\n  o.O\n'
+
+string="$(printf '%s' "${string}" | ../src/py_regex_replace/main.py -p "${pattern}" -r "${repl}" -c 1)"
+
+printf 'RESULT>>>\n%s\n<<<RESULT\n' "${string}"