Lenient compile: add sanitizer for TikZ nodes & bullets; call sanitizer; keep latexmk -f and accept PDF even on errors

app.py

@@ -72,6 +72,58 @@ def _write_logs(log_path: Path, logs):
     except Exception:
         pass
 
+def _sanitize_tex_lenient(tex_path: Path, logs):
+    """Best-effort, non-invasive fixes to let compilation proceed.
+    - Ensure TikZ \node lines have trailing ';' and an empty label '{}' if missing.
+    - Replace Unicode bullets with \textbullet{}.
+    Operates in-place on the run-local copy only.
+    """
+    try:
+        text = tex_path.read_text(encoding="utf-8")
+        lines = text.splitlines()
+        changed = False
+        cnt_semicolon = 0
+        cnt_emptylabel = 0
+        cnt_bullet = 0
+        new_lines = []
+        for line in lines:
+            orig = line
+            # Replace bullets
+            if "\\•" in line or "•" in line:
+                line = line.replace("\\•", r"\\textbullet{}")
+                line = line.replace("•", r"\\textbullet{}")
+                if line != orig:
+                    cnt_bullet += 1
+                    orig = line
+            # Fix TikZ node syntax (line-based heuristic)
+            if "\\node" in line:
+                # Ensure semicolon at end of command line
+                stripped = line.rstrip()
+                if not stripped.endswith(";"):
+                    line = stripped + ";"
+                    cnt_semicolon += 1
+                # Add empty label '{}' before the first trailing ';' if no braces after ')'
+                try:
+                    close_paren = line.rfind(")")
+                    if close_paren != -1:
+                        tail = line[close_paren+1:]
+                        semi = tail.find(";")
+                        if semi != -1:
+                            between = tail[:semi]
+                            if "{" not in between:
+                                line = line[:close_paren+1] + " {}" + tail
+                                cnt_emptylabel += 1
+                except Exception:
+                    pass
+            new_lines.append(line)
+        if new_lines != lines:
+            tex_path.write_text("\n".join(new_lines), encoding="utf-8")
+            logs.append(
+                f"🧯 Lenient sanitizer: +semicolon={cnt_semicolon}, +emptylabel={cnt_emptylabel}, bullets_fixed={cnt_bullet}"
+            )
+    except Exception as e:
+        logs.append(f"⚠️ sanitizer skipped: {e}")
+
 def _on_rm_error(func, path, exc_info):
     # fix "PermissionError: [Errno 13] Permission denied" for readonly files
     os.chmod(path, stat.S_IWRITE)
@@ -429,6 +481,9 @@ def _compile_poster_pdf(OUTPUT_DIR: Path, logs):
         def _has(bin_name):
             return _sh.which(bin_name) is not None
 
+        # Apply lenient sanitizer on the main tex before compile
+        _sanitize_tex_lenient(tex_path, logs)
+
         # Most-tolerant: prefer latexmk with XeLaTeX and force (-f), then XeLaTeX, then LuaLaTeX
         if _has("latexmk"):
             cmd = ["latexmk", "-xelatex", "-pdf", "-f", "-interaction=nonstopmode", "-file-line-error", tex_path.name]
@@ -496,6 +551,9 @@ def _compile_tex_to_pdf(tex_path: Path, logs):
         import shutil as _sh, subprocess as _sp
         def _has(bin_name):
             return _sh.which(bin_name) is not None
+        # Apply lenient sanitizer on the main tex before compile
+        _sanitize_tex_lenient(tex_path, logs)
+
         # Prefer XeLaTeX (Overleaf-like), then LuaLaTeX, then latexmk (forced XeLaTeX)
         if _has("xelatex"):
             cmd = ["xelatex", "-interaction=nonstopmode", "-file-line-error", tex_path.name]