[mod] Schalter für Beachtung von Leerzeichen

readme.md

@@ -0,0 +1,82 @@
+# coin
+
+## Description
+
+transforms a template string to its refined version by substituting its placeholders with concrete values
+
+
+## Building
+
+### Requirements
+
+- shell interpreter
+
+
+### Instructions
+
+- execute `tools/build`
+
+
+## Installation
+
+### Requirements
+
+- shell interpreter
+
+
+### Instructions
+
+- (as `root`) execute `tools/install`
+
+
+## Usage
+
+### Requirements
+
+- Python 3 interpreter
+
+
+### Examples
+
+#### basic
+
+```
+echo '{{flowers}} are {{color}}' | coin -a 'flowers:roses' -a 'color:red'
+
+# roses are red
+```
+
+The same result can be produced by using multiple `coin` calls:
+
+```
+echo '{{flowers}} are {{color}}' | coin -a 'flowers:roses' | coin -a 'color:red'
+```
+
+In some contextes curly brackets might might be reserved or not available for other reasons. This can be mitigated by using different placeholder indicators:
+
+```
+echo '<<flowers>> are <<color>>' | coin -o '<<' -c '>>' -a 'flowers:roses' -a 'color:red'
+```
+
+
+#### file arguments
+
+```
+echo -n "cornflowers" > /tmp/flowers.txt
+echo -n "blue" > /tmp/color.txt
+echo '{{flowers}} are {{color}}' | coin -a 'flowers:@/tmp/flowers.txt' -a 'color:@/tmp/color.txt'
+
+# cornflowers are blue
+```
+
+
+#### data file
+
+```
+echo -e "flowers: daffodills\ncolor: yellow" > /tmp/data.yaml
+echo '{{flowers}} are {{color}}' | coin -d /tmp/data.yaml
+
+# daffodills are yellow
+```
+
+

source/main.py

@@ -1,4 +1,5 @@
 import sys as _sys
+import re as _re
 import json as _json
 import yaml as _yaml
 import argparse as _argparse
@@ -22,23 +23,29 @@ def string_coin(
 	options = (
 		{
 			"character_open": "{{",
-			"character_close": "}}"
+			"character_close": "}}",
+			"ignore_whitespaces": True,
 		}
 		|
 		(options or {})
 	)
 	result = template
 	for (key, value, ) in arguments.items():
-		result = result.replace(
-			(
-				"%s%s%s"
-				% (
-					options["character_open"],
-					key,
-					options["character_close"],
-				)
-			),
-			value
+		pattern = (
+			_re.escape(options["character_open"])
+			+
+			("\s*" if options["ignore_whitespaces"] else "")
+			+
+			_re.escape(key)
+			+
+			("\s*" if options["ignore_whitespaces"] else "")
+			+
+			_re.escape(options["character_close"])
+		)
+		result = _re.sub(
+			pattern,
+			value,
+			result
 		)
 	return result
 	
@@ -154,6 +161,12 @@ def main(
 		metavar = "<character-close>",
 		help = "placeholder closing character",
 	)
+	argument_parser.add_argument(
+		"-w",
+		"--heed-whitespaces",
+		action = "store_true",
+		help = "whether whitespace characters in the template string shall be heeded, i.e. not be ignored",
+	)
 	args = argument_parser.parse_args()
 	
 	## exec
@@ -169,6 +182,7 @@ def main(
 		{
 			"character_open": args.character_open,
 			"character_close": args.character_close,
+			"ignore_whitespaces": (not args.heed_whitespaces),
 		}
 	)
 	_sys.stdout.write(content_out)