From f6ecddd38e234e77d06e5d103804f61df858fbb0 Mon Sep 17 00:00:00 2001
From: Shavez <sadiyavip09@gmail.com>
Date: Sat, 13 Sep 2025 16:02:39 +0530
Subject: [PATCH] fix(Latex): add latex_cache directory to resolve LaTeX
 compilation errors. Fixes #2390

---
 manimlib/default_config.yml        |  2 +
 manimlib/utils/tex_file_writing.py | 97 +++++++++++++++---------------
 2 files changed, 52 insertions(+), 47 deletions(-)

diff --git a/manimlib/default_config.yml b/manimlib/default_config.yml
index 098c6c45d5..51676848e6 100644
--- a/manimlib/default_config.yml
+++ b/manimlib/default_config.yml
@@ -30,6 +30,8 @@ directories:
     data: "data"
     # When downloading, say an image, where will it go?
     downloads: "downloads"
+    # For storing cached LaTeX compilation results
+    latex_cache: "latex_cache"
   # For certain object types, especially Tex and Text, manim will save information
   # to file to prevent the need to re-compute, e.g. recompiling the latex. By default,
   # it stores this saved data to whatever directory appdirs.user_cache_dir("manim") returns,
diff --git a/manimlib/utils/tex_file_writing.py b/manimlib/utils/tex_file_writing.py
index cfc91f4fed..6c85564e2e 100644
--- a/manimlib/utils/tex_file_writing.py
+++ b/manimlib/utils/tex_file_writing.py
@@ -93,53 +93,56 @@ def full_tex_to_svg(full_tex: str, compiler: str = "latex", message: str = ""):
     else:
         raise NotImplementedError(f"Compiler '{compiler}' is not implemented")
 
-    # Write intermediate files to a temporary directory
-    with tempfile.TemporaryDirectory() as temp_dir:
-        tex_path = Path(temp_dir, "working").with_suffix(".tex")
-        dvi_path = tex_path.with_suffix(dvi_ext)
-
-        # Write tex file
-        tex_path.write_text(full_tex)
-
-        # Run latex compiler
-        process = subprocess.run(
-            [
-                compiler,
-                *(['-no-pdf'] if compiler == "xelatex" else []),
-                "-interaction=batchmode",
-                "-halt-on-error",
-                f"-output-directory={temp_dir}",
-                tex_path
-            ],
-            capture_output=True,
-            text=True
-        )
-
-        if process.returncode != 0:
-            # Handle error
-            error_str = ""
-            log_path = tex_path.with_suffix(".log")
-            if log_path.exists():
-                content = log_path.read_text()
-                error_match = re.search(r"(?<=\n! ).*\n.*\n", content)
-                if error_match:
-                    error_str = error_match.group()
-            raise LatexError(error_str or "LaTeX compilation failed")
-
-        # Run dvisvgm and capture output directly
-        process = subprocess.run(
-            [
-                "dvisvgm",
-                dvi_path,
-                "-n",  # no fonts
-                "-v", "0",  # quiet
-                "--stdout",  # output to stdout instead of file
-            ],
-            capture_output=True
-        )
-
-        # Return SVG string
-        result = process.stdout.decode('utf-8')
+    # Use the custom LaTeX cache directory from the config
+    temp_dir = Path(manim_config.directories.latex_cache)
+    temp_dir.mkdir(exist_ok=True) # Create the directory if it does not already exist
+
+    # Define paths for the intermediate TeX and DVI files
+    tex_path = temp_dir / "working.tex"
+    dvi_path = tex_path.with_suffix(dvi_ext)
+
+    # Write tex file
+    tex_path.write_text(full_tex)
+
+    # Run latex compiler
+    process = subprocess.run(
+        [
+            compiler,
+            *(['-no-pdf'] if compiler == "xelatex" else []),
+            "-interaction=batchmode",
+            "-halt-on-error",
+            f"-output-directory={temp_dir}",
+            tex_path
+        ],
+        capture_output=True,
+        text=True
+    )
+
+    if process.returncode != 0:
+        # Handle error
+        error_str = ""
+        log_path = tex_path.with_suffix(".log")
+        if log_path.exists():
+            content = log_path.read_text()
+            error_match = re.search(r"(?<=\n! ).*\n.*\n", content)
+            if error_match:
+                error_str = error_match.group()
+        raise LatexError(error_str or "LaTeX compilation failed")
+
+    # Run dvisvgm and capture output directly
+    process = subprocess.run(
+        [
+            "dvisvgm",
+            dvi_path,
+            "-n",  # no fonts
+            "-v", "0",  # quiet
+            "--stdout",  # output to stdout instead of file
+        ],
+        capture_output=True
+    )
+
+    # Return SVG string
+    result = process.stdout.decode('utf-8')
 
     if message:
         print(" " * len(message), end="\r")