add new lines to the start and end of each structured text section

.pre-commit-hooks.yaml

@@ -46,3 +46,9 @@
   entry: no-product-version
   language: python
   files: .*\.(TcPOU|TcDUT|TcGVL)$
+- id: twincat-st-newline
+  name: TwinCAT ST Newline Formatter
+  description: Affixes newlines to ST segments
+  entry: twincat-st-newline
+  language: python
+  files: .*\.(TcPOU|TcGVL|TcDUT)$

README.md

@@ -12,7 +12,7 @@ Pre-commit hooks for PCDS projects (https://pre-commit.com/)
 
 If `.pre-config-config.yaml` does not already exist in the repository, copy
 the appropriate file from this repository to the top-level of your local
-repository, or add the folowing to an existing `.pre-config-config.yaml` 
+repository, or add the folowing to an existing `.pre-config-config.yaml`
 file and commit the addition.
 
 ```yaml
@@ -25,13 +25,14 @@ repos:
         files: \.(TcPOU|TcDUT|TcGVL)$
 
 -   repo: https://github.com/pcdshub/pre-commit-hooks.git
-    rev: v1.4.0
+    rev: v1.5.0
     hooks:
     -   id: twincat-leading-tabs-remover
     -   id: twincat-lineids-remover
     -   id: twincat-xml-format
     -   id: check-fixed-library-versions
     -   id: no-product-version
+    -   id: twincat-st-newline
     # Optional, if you use pytmc to generate EPICS IOCs:
     # -   id: pytmc-pragma-linter
 ```

forTwinCatRepos/.pre-commit-config.yaml

@@ -9,12 +9,13 @@ repos:
         files: \.(TcPOU|TcDUT|TcGVL)$
 
 -   repo: https://github.com/pcdshub/pre-commit-hooks.git
-    rev: v1.4.0
+    rev: v1.5.0
     hooks:
     -   id: twincat-leading-tabs-remover
     -   id: twincat-lineids-remover
     -   id: twincat-xml-format
     -   id: check-fixed-library-versions
     -   id: no-product-version
+    -   id: twincat-st-newline
     # Optional, if you use pytmc to generate EPICS IOCs:
     # -   id: pytmc-pragma-linter

pre_commit_hooks/twincat_st_new_lines.py

@@ -0,0 +1,32 @@
+import argparse
+from lxml import etree
+
+def structured_text_formatter(path: str, lines: int = 1) -> None:
+    root = etree.parse(path).getroot()
+    sect = root.xpath('.//Declaration|.//Implementation/ST')
+    if len(sect) == 0:
+        return
+
+    newlines = '\n' * lines
+    for section in sect:
+        try:
+            section.text = etree.CDATA(newlines + section.text.strip('\n') + newlines)
+        except AttributeError:
+            pass
+    etree.ElementTree(root).write(path, encoding='utf-8', xml_declaration=True)
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--lines', type=int, default=1)
+    parser.add_argument('files', nargs='*')
+    args = parser.parse_args()
+
+    try:
+        for file in args.files:
+            structured_text_formatter(file, args.lines)
+    except:
+        return 1
+
+
+if __name__ == "__main__":
+    exit(main())

setup.py

@@ -10,6 +10,7 @@
               'xml-format',
               'check-fixed-library-versions',
               'no-product-version',
+              'twincat-st-newline',
               ]
 console_scripts = []
 for name in hook_names: