Cache all fonts

.github/workflows/check-build.yml

@@ -80,6 +80,15 @@ jobs:
         working-directory: test/subdir1
         run: |
           docker run -v $(pwd)/..:/workdir localhost:5000/name/app:latest /bin/bash -c "cd subdir1 && lualatex current-file.tex"
+      - name: 51-lualatex-simple.tex
+        run: |
+          docker run -v $(pwd)/test:/workdir localhost:5000/name/app:latest latexmk -pdflua 51-lualatex-simple.tex
+      - name: 51-lualatex-simple.tex (cache test)
+        run: |
+          set -e
+          output=$(docker run -v $(pwd)/test:/workdir localhost:5000/name/app:latest latexmk -pdflua 51-lualatex-simple.tex)
+          echo "$output"
+          echo "$output" | grep -qv "All targets are up-to-date" && exit 1
       - name: Archive PDFs
         uses: actions/upload-artifact@v4
         with:

.vscode/extensions.json

@@ -0,0 +1,5 @@
+{
+    "recommendations": [
+        "ms-azuretools.vscode-docker"
+    ]
+}

CHANGELOG.md

@@ -24,6 +24,10 @@ We use letters instead of numbers to avoid confusion with the automatic builds s
 
 Note that this version is continuously built based on [texlive/texlive](https://gitlab.com/islandoftex/images/texlive).
 
+### Added
+
+- All fonts are cached so that `latexmk` correctly determines whether it should re run. [#51](https://github.com/dante-ev/docker-texlive/issues/51)
+
 ## TeXLive 2024
 
 ### [2024-B] – 2025-02-13

Dockerfile

@@ -16,6 +16,7 @@ ENV LANG=C.UTF-8 \
 ARG BUILD_DATE
 ARG GITLATEXDIFF_VERSION=1.6.0
 
+# Required at least for PlantUML below
 WORKDIR /home
 
 # Fix for update-alternatives: error: error creating symbolic link '/usr/share/man/man1/rmid.1.gz.dpkg-tmp': No such file or directory
@@ -67,7 +68,14 @@ RUN wget https://github.com/plantuml/plantuml/releases/download/v1.2025.0/plantu
   rm plantuml.zip
 ENV PLANTUML_JAR=/home/plantuml.jar
 
-# update font index
-RUN luaotfload-tool --update
+# Create font cache
+COPY load-fonts.tex /tmp/
+RUN luaotfload-tool --update --force --no-compress && \
+  texhash && \
+  # This errors because of missing glyphs, but still populates the cache
+  cd /tmp && yes "" | lualatex load-fonts || true && \
+  # Needs to run twice according to https://tex.stackexchange.com/a/737059/9075
+  cd /tmp && yes "" | lualatex load-fonts || true && \
+  rm /tmp/load-fonts.*
 
 WORKDIR /workdir

load-fonts.tex

@@ -0,0 +1,30 @@
+% Source: https://tex.stackexchange.com/a/737059/9075
+
+ %! TeX program = lualatex
+ \documentclass{article}
+ \usepackage{fontspec}
+ \usepackage{luacode}
+ \begin{document}
+
+ % based on https://tex.stackexchange.com/a/14171/9075
+ % based on @cfr's https://tex.stackexchange.com/a/737051/38080
+ % addaswyd yn ateb: https://tex.stackexchange.com/a/737051/
+ \begin{luacode}
+   myfonts = luaotfload.aux.read_font_index()
+   t={ myfonts, myfonts.families }
+   -- really? https://stackoverflow.com/questions/2705793/how-to-get-number-of-entries-in-a-lua-table 
+   total = 0
+   for _,i in ipairs(myfonts.mappings) do
+     total = total + 1
+   end
+   n=0
+   for _,i in ipairs(myfonts.mappings) do
+     n = n + 1
+     -- if n > 100 then return 0 end -- be patient...
+     tex.print("\\ttfamily\\tiny\\detokenize{"  .. myfonts.mappings[n].plainname .. "}: " ..
+       "\\font\\myfont = {file:" .. myfonts.mappings[n].basename .. "} at 14pt \\myfont \\detokenize{" ..
+       myfonts.mappings[n].plainname .. "}\\par\\smallskip")
+     tex.print("\\typeout{font " .. n .. " of " .. total .. "}")
+   end
+ \end{luacode}
+ \end{document}

test/51-lualatex-simple.tex

@@ -0,0 +1,6 @@
+\documentclass{article}
+\usepackage{fontspec}
+\setmainfont{QTGraphLite}
+\begin{document}
+Essai
+\end{document}