From fac7efb7cf27425fe58dda2f3dbbb1868a647548 Mon Sep 17 00:00:00 2001
From: HsiangNianian <i@jyunko.cn>
Date: Mon, 6 Oct 2025 01:38:50 +0800
Subject: feat: add latexonly target to Makefile for building LaTeX from
 existing sources and update workflow to use it

---
 .github/workflows/docs.yml | 2 +-
 docs/Makefile              | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 462872d..c9f4df9 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -35,7 +35,7 @@ jobs:
         with:
           run: |
             cd docs
-            make latex
+            make latexonly
             cd _build/latex
             ls -l
             make
diff --git a/docs/Makefile b/docs/Makefile
index 59b5b2c..40a00ea 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -1,3 +1,6 @@
+# latexonly: only build latex from already generated sources
+latexonly:
+	$(SPHINXBUILD) -b latex "$(SOURCEDIR)" "$(BUILDDIR)/latex" $(SPHINXOPTS) $(O)
 # Minimal makefile for Sphinx documentation
 #
 
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