Add --version flag to pf command

Author: AndyCappDev

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -67,7 +67,7 @@ body:
     id: version
     attributes:
       label: PostForge version
-      description: Run `pf` and check the version in the startup banner.
+      description: Run `pf --version`.
     validations:
       required: false
 

postforge/cli_args.py

@@ -11,6 +11,7 @@
 
 import argparse
 import os
+import re
 
 
 def _parse_page_ranges(spec: str) -> set:
@@ -87,6 +88,18 @@ def get_output_base_name(outputfile: str, inputfiles: list) -> str:
         return "page"
 
 
+def _get_version() -> str:
+    """Read the PostForge version from sysdict.ps (sole source of truth)."""
+    sysdict = os.path.join(os.path.dirname(os.path.abspath(__file__)),
+                           os.pardir, "resources", "Init", "sysdict.ps")
+    with open(sysdict, "r") as f:
+        for line in f:
+            m = re.search(r'/revisionstring\s+\(([^)]+)\)', line)
+            if m:
+                return m.group(1)
+    return "unknown"
+
+
 def build_argument_parser(available_devices: list) -> argparse.ArgumentParser:
     """
     Create and configure the PostForge argument parser.
@@ -103,6 +116,10 @@ def build_argument_parser(available_devices: list) -> argparse.ArgumentParser:
         epilog="If no input file is provided, PostForge will run in interactive mode.",
     )
 
+    parser.add_argument(
+        "-V", "--version", action="version",
+        version=f"PostForge {_get_version()}"
+    )
     parser.add_argument("inputfiles", nargs="*", help="PostScript input files to process (each as separate job)")
     parser.add_argument(
         "-o", "--output", dest="outputfile", help="Specify output filename"