feat(tectonic): robust detection of binary in common paths + keep python -m fallback; simplify postBuild; avoid pip tectonic

app.py

@@ -380,9 +380,22 @@ def _compile_poster_pdf(OUTPUT_DIR: Path, logs):
 
         def _has(bin_name):
             return _sh.which(bin_name) is not None
+        def _candidate_tectonic():
+            import os
+            cands = [
+                "tectonic",
+                str(Path("/usr/local/bin/tectonic")),
+                str(Path("/usr/bin/tectonic")),
+                os.path.expanduser("~/.local/bin/tectonic"),
+            ]
+            for c in cands:
+                if _sh.which(c) or Path(c).exists():
+                    return c
+            return None
 
-        if _has("tectonic"):
-            cmd = ["tectonic", tex_path.name]
+        tbin = _candidate_tectonic()
+        if tbin:
+            cmd = [tbin, tex_path.name]
             logs.append("▶ Compiling with tectonic …")
         elif _has("lualatex"):
             cmd = ["lualatex", "-interaction=nonstopmode", tex_path.name]
@@ -444,8 +457,21 @@ 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
-        if _has("tectonic"):
-            cmd = ["tectonic", tex_path.name]
+        def _candidate_tectonic():
+            import os
+            cands = [
+                "tectonic",
+                str(Path("/usr/local/bin/tectonic")),
+                str(Path("/usr/bin/tectonic")),
+                os.path.expanduser("~/.local/bin/tectonic"),
+            ]
+            for c in cands:
+                if _sh.which(c) or Path(c).exists():
+                    return c
+            return None
+        tbin = _candidate_tectonic()
+        if tbin:
+            cmd = [tbin, tex_path.name]
             logs.append("▶ Compiling with tectonic …")
         elif _has("lualatex"):
             cmd = ["lualatex", "-interaction=nonstopmode", tex_path.name]

install_tectonic.sh

@@ -4,8 +4,21 @@ set -e
 echo "📦 Installing tectonic..."
 
 if ! command -v tectonic &> /dev/null; then
-  wget -O /tmp/tectonic.tar.gz https://github.com/tectonic-typesetting/tectonic/releases/download/tectonic%400.15.0/tectonic-0.15.0-x86_64-unknown-linux-gnu.tar.gz
+  URL="https://github.com/tectonic-typesetting/tectonic/releases/download/tectonic%400.15.0/tectonic-0.15.0-x86_64-unknown-linux-gnu.tar.gz"
   mkdir -p /tmp/tectonic
+  if command -v curl >/dev/null 2>&1; then
+    curl -L "$URL" -o /tmp/tectonic.tar.gz
+  elif command -v wget >/dev/null 2>&1; then
+    wget -O /tmp/tectonic.tar.gz "$URL"
+  else
+    if command -v apt-get >/dev/null 2>&1; then
+      apt-get update && apt-get install -y wget
+      wget -O /tmp/tectonic.tar.gz "$URL"
+    else
+      echo "❌ Neither curl nor wget available, and apt-get not present." >&2
+      exit 1
+    fi
+  fi
   tar -xzf /tmp/tectonic.tar.gz -C /tmp/tectonic
 
   # 找到可执行文件路径
@@ -13,8 +26,6 @@ if ! command -v tectonic &> /dev/null; then
 
   # 默认安装路径
   INSTALL_DIR="/usr/local/bin"
-
-  # 如果没有写入权限，就改到用户目录
   if [ ! -w "$INSTALL_DIR" ]; then
     INSTALL_DIR="$HOME/.local/bin"
     mkdir -p "$INSTALL_DIR"
@@ -26,8 +37,7 @@ if ! command -v tectonic &> /dev/null; then
 
   # 自动提示 PATH 设置
   if [[ ":$PATH:" != *":$INSTALL_DIR:"* ]]; then
-    echo "⚙️  You may need to add this to your ~/.bashrc:"
-    echo "export PATH=\$PATH:$INSTALL_DIR"
+    echo "⚙️  You may need to add this to your PATH: $INSTALL_DIR"
   fi
 
   echo "✅ Tectonic installed successfully at $INSTALL_DIR/tectonic"

postBuild

@@ -1,12 +1,7 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-echo "[postBuild] Ensuring wget present and installing Tectonic"
-if ! command -v wget >/dev/null 2>&1; then
-  apt-get update
-  apt-get install -y wget
-fi
-
+echo "[postBuild] Installing Tectonic"
 bash install_tectonic.sh || echo "[postBuild] Tectonic install script returned non-zero; continuing."
 
 echo "[postBuild] Done"

requirements.txt

@@ -18,7 +18,6 @@ scikit-learn==1.6.1
 scipy==1.15.1
 sentence-transformers==3.3.1
 transformers==4.48.0
-tectonic==0.15.0
 
 # ========= ML / LLM Frameworks =========
 accelerate