Switch to XeLaTeX: apt-install TeX Live (xelatex/luatex/latexmk + extras); remove Tectonic install in postBuild

app.py

@@ -429,29 +429,19 @@ def _compile_poster_pdf(OUTPUT_DIR: Path, logs):
         def _has(bin_name):
             return _sh.which(bin_name) is not None
 
-        tbin = _get_tectonic_bin(logs)
-        if tbin:
-            cmd = [tbin, tex_path.name]
-            logs.append("▶ Compiling with tectonic …")
+        # 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 …")
         elif _has("lualatex"):
-            cmd = ["lualatex", "-interaction=nonstopmode", tex_path.name]
+            cmd = ["lualatex", "-interaction=nonstopmode", "-file-line-error", tex_path.name]
             logs.append("▶ Compiling with lualatex …")
-        elif _has("xelatex"):
-            cmd = ["xelatex", "-interaction=nonstopmode", tex_path.name]
-            logs.append("▶ Compiling with xelatex …")
         elif _has("latexmk"):
-            cmd = ["latexmk", "-pdf", "-interaction=nonstopmode", tex_path.name]
-            logs.append("▶ Compiling with latexmk …")
+            cmd = ["latexmk", "-xelatex", "-pdf", "-interaction=nonstopmode", tex_path.name]
+            logs.append("▶ Compiling with latexmk (-xelatex) …")
         else:
-            # try python -m tectonic if module is installed
-            try:
-                import importlib
-                importlib.import_module("tectonic")
-                cmd = [sys.executable, "-m", "tectonic", tex_path.name]
-                logs.append("▶ Compiling with python -m tectonic …")
-            except Exception:
-                logs.append("⚠️ No TeX engine found (tectonic/lualatex/xelatex/latexmk) and 'tectonic' module missing. Skipping PDF compile.")
-                return None
+            logs.append("⚠️ No TeX engine found (xelatex/lualatex/latexmk). Skipping PDF compile.")
+            return None
 
         import os as _os
         _env = _os.environ.copy()
@@ -502,28 +492,19 @@ 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
-        tbin = _get_tectonic_bin(logs)
-        if tbin:
-            cmd = [tbin, tex_path.name]
-            logs.append("▶ Compiling with tectonic …")
+        # 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 …")
         elif _has("lualatex"):
-            cmd = ["lualatex", "-interaction=nonstopmode", tex_path.name]
+            cmd = ["lualatex", "-interaction=nonstopmode", "-file-line-error", tex_path.name]
             logs.append("▶ Compiling with lualatex …")
-        elif _has("xelatex"):
-            cmd = ["xelatex", "-interaction=nonstopmode", tex_path.name]
-            logs.append("▶ Compiling with xelatex …")
         elif _has("latexmk"):
-            cmd = ["latexmk", "-pdf", "-interaction=nonstopmode", tex_path.name]
-            logs.append("▶ Compiling with latexmk …")
+            cmd = ["latexmk", "-xelatex", "-pdf", "-interaction=nonstopmode", tex_path.name]
+            logs.append("▶ Compiling with latexmk (-xelatex) …")
         else:
-            try:
-                import importlib
-                importlib.import_module("tectonic")
-                cmd = [sys.executable, "-m", "tectonic", tex_path.name]
-                logs.append("▶ Compiling with python -m tectonic …")
-            except Exception:
-                logs.append("⚠️ No TeX engine found.")
-                return None
+            logs.append("⚠️ No TeX engine found (xelatex/lualatex/latexmk).")
+            return None
         import os as _os
         _env = _os.environ.copy()
         texinputs = _env.get("TEXINPUTS", "")

packages.txt

@@ -0,0 +1,6 @@
+texlive-xetex
+texlive-luatex
+texlive-latex-extra
+texlive-pictures
+texlive-fonts-recommended
+latexmk

postBuild

@@ -9,7 +9,4 @@ else
   echo "[postBuild] apt-get not available; skipping font install"
 fi
 
-echo "[postBuild] Installing Tectonic"
-bash install_tectonic.sh || echo "[postBuild] Tectonic install script returned non-zero; continuing."
-
 echo "[postBuild] Done"