add support for installing additional system packages

Author: xu-cheng

.github/workflows/test.yml

@@ -20,8 +20,16 @@ jobs:
           root_file: biblatex.tex
           working_directory: test/
           extra_packages: biblatex-ieee
+      - name: Compile LaTeX document with minted
+        uses: ./
+        with:
+          root_file: minted.tex
+          working_directory: test/
+          extra_system_packages: py-pygments
+          args: "-pdf -shell-escape -file-line-error -interaction=nonstopmode"
       - name: Check pdf file
         run: |
           set -e
           file test/test.pdf | grep -q ' PDF '
           file test/biblatex.pdf | grep -q ' PDF '
+          file test/minted.pdf | grep -q ' PDF '

README.md

@@ -24,7 +24,11 @@ It runs in the docker with a minimal [TeXLive](https://www.tug.org/texlive/) env
 
 * `extra_packages`
 
-    The extra packages to be installed by `tlmgr` separated by space. Sometimes, `texliveonfly` will fail to find the missing packages. In this case, you can pass them explicitly. For example, `extra_packages: "biblatex-trad biblatex-ieee"` will install packages `biblatex-trad` and `biblatex-ieee`.
+    The extra packages to be installed by [`tlmgr`](https://www.tug.org/texlive/tlmgr.html) separated by space. Sometimes, `texliveonfly` will fail to find the missing packages. In this case, you can pass them explicitly. For example, `extra_packages: "biblatex-trad biblatex-ieee"` will install packages `biblatex-trad` and `biblatex-ieee`.
+
+* `extra_system_packages`
+
+    The extra packages to be installed by [`apk`](https://pkgs.alpinelinux.org/packages) separated by space. For example, `extra_system_packages: "py-pygments"` will install the package `py-pygments` to be used by the `minted` for code highlights.
 
 ## Example
 

action.yml

@@ -15,6 +15,8 @@ inputs:
     default: "-pdf -file-line-error -interaction=nonstopmode"
   extra_packages:
     description: Install extra packages by tlmgr
+  extra_system_packages:
+    description: Install extra packages by apk
 runs:
   using: docker
   image: Dockerfile
@@ -24,6 +26,7 @@ runs:
     - ${{ inputs.compiler }}
     - ${{ inputs.args }}
     - ${{ inputs.extra_packages }}
+    - ${{ inputs.extra_system_packages }}
 branding:
   icon: book
   color: blue

entrypoint.sh

@@ -7,11 +7,19 @@ working_directory="$2"
 compiler="$3"
 args="$4"
 extra_packages="$5"
+extra_system_packages="$6"
+
+if [ -n "$extra_system_packages" ]; then
+  for pkg in $extra_system_packages; do
+    echo "Install $pkg by apk"
+    apk --no-cache add "$pkg"
+  done
+fi
 
 if [ -n "$extra_packages" ]; then
   tlmgr update --self
   for pkg in $extra_packages; do
-    echo "Install $pkg"
+    echo "Install $pkg by tlmgr"
     tlmgr install "$pkg"
   done
 fi

test/minted.tex

@@ -0,0 +1,10 @@
+\documentclass{article}
+\usepackage{minted}
+\begin{document}
+\begin{minted}{c}
+int main() {
+  printf("hello, world");
+  return 0;
+}
+\end{minted}
+\end{document}