Ultra-lenient compile: demote Package/TikZ errors via pretex injection; latexmk -f with -pretex; fallbacks inject pretex too

app.py

@@ -72,57 +72,7 @@ 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}")
+## Removed sanitizer per request: do not mutate user-generated TeX
 
 def _on_rm_error(func, path, exc_info):
     # fix "PermissionError: [Errno 13] Permission denied" for readonly files
@@ -481,19 +431,25 @@ 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
+        pretex = r"\nonstopmode\scrollmode\makeatletter\let\pgf@error\pgf@warning\let\GenericError\GenericWarning\let\PackageError\PackageWarning\makeatother"
         if _has("latexmk"):
-            cmd = ["latexmk", "-xelatex", "-pdf", "-f", "-interaction=nonstopmode", "-file-line-error", tex_path.name]
-            logs.append("▶ Compiling with latexmk (-xelatex, -f) …")
+            cmd = [
+                "latexmk", "-xelatex", "-pdf", "-f",
+                "-interaction=nonstopmode", "-file-line-error",
+                f"-pretex={pretex}",
+                tex_path.name,
+            ]
+            logs.append("▶ Compiling with latexmk (-xelatex, -f, pretex demote errors) …")
         elif _has("xelatex"):
-            cmd = ["xelatex", "-interaction=nonstopmode", "-file-line-error", tex_path.name]
-            logs.append("▶ Compiling with xelatex …")
+            # Inject pretex macros via direct input to engine (no file mutation)
+            injected = pretex + f"\\input{{{tex_path.name}}}"
+            cmd = ["xelatex", "-interaction=nonstopmode", "-file-line-error", injected]
+            logs.append("▶ Compiling with xelatex (pretex injected) …")
         elif _has("lualatex"):
-            cmd = ["lualatex", "-interaction=nonstopmode", "-file-line-error", tex_path.name]
-            logs.append("▶ Compiling with lualatex …")
+            injected = pretex + f"\\input{{{tex_path.name}}}"
+            cmd = ["lualatex", "-interaction=nonstopmode", "-file-line-error", injected]
+            logs.append("▶ Compiling with lualatex (pretex injected) …")
         else:
             logs.append("⚠️ No TeX engine found (latexmk/xelatex/lualatex). Skipping PDF compile.")
             return None
@@ -551,19 +507,24 @@ 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]
-            logs.append("▶ Compiling with xelatex …")
+        # Most-tolerant: latexmk first with pretex demoting errors; fallbacks inject pretex, too
+        pretex = r"\nonstopmode\scrollmode\makeatletter\let\pgf@error\pgf@warning\let\GenericError\GenericWarning\let\PackageError\PackageWarning\makeatother"
+        if _has("latexmk"):
+            cmd = [
+                "latexmk", "-xelatex", "-pdf", "-f",
+                "-interaction=nonstopmode", "-file-line-error",
+                f"-pretex={pretex}",
+                tex_path.name,
+            ]
+            logs.append("▶ Compiling with latexmk (-xelatex, -f, pretex demote errors) …")
+        elif _has("xelatex"):
+            injected = pretex + f"\\input{{{tex_path.name}}}"
+            cmd = ["xelatex", "-interaction=nonstopmode", "-file-line-error", injected]
+            logs.append("▶ Compiling with xelatex (pretex injected) …")
         elif _has("lualatex"):
-            cmd = ["lualatex", "-interaction=nonstopmode", "-file-line-error", tex_path.name]
-            logs.append("▶ Compiling with lualatex …")
-        elif _has("latexmk"):
-            cmd = ["latexmk", "-xelatex", "-pdf", "-interaction=nonstopmode", tex_path.name]
-            logs.append("▶ Compiling with latexmk (-xelatex) …")
+            injected = pretex + f"\\input{{{tex_path.name}}}"
+            cmd = ["lualatex", "-interaction=nonstopmode", "-file-line-error", injected]
+            logs.append("▶ Compiling with lualatex (pretex injected) …")
         else:
             logs.append("⚠️ No TeX engine found (xelatex/lualatex/latexmk).")
             return None