fix: resolve #761 — Compiling a ST program ending in a comment fails

[andoan16]

Summary

fix: resolve #761 — Compiling a ST program ending in a comment fails

Problem

Severity: High | File: configs/ports/compiler-port.ts

The OpenPLC compiler fails when ST programs end directly with comments without trailing newlines. This fix ensures that before compilation, any ST program content is checked and a newline is appended if missing. This prevents the compilation error while maintaining the original file formatting for editing.

Solution

Add a preprocessing step in the compiler port that checks if ST files end with a newline character, and if not, appends one before passing the content to the compiler. This should be done in-memory without modifying the original source files, or alternatively, ensure the saved files always end with newlines.

Changes

• configs/ports/compiler-port.ts (new)
• docs/ports/compiler-port.ts (modified)

Testing

• Existing tests pass
• Manual review completed
• No new warnings/errors introduced

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: e3371061-0194-4f6a-a0c5-69c8f83ac85e

📥 Commits

Reviewing files that changed from the base of the PR and between 456c08a and 9344d73.

📒 Files selected for processing (2)

• configs/ports/compiler-port.ts
• docs/ports/compiler-port.ts

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