ci: cache tectonic and tectonic deps

.gitlab-ci.yml

@@ -12,14 +12,40 @@ variables:
 build:
   stage: build
   image: alpine:latest
-  script:
+  variables:
-    - apk update && apk upgrade && apk add curl
+    TECTONIC_DEPS_CACHE_PATH: "${CI_PROJECT_DIR}/.cache/Tectonic"
-    - curl -L0 https://github.com/tectonic-typesetting/tectonic/releases/download/tectonic%400.14.1/tectonic-0.14.1-x86_64-unknown-linux-musl.tar.gz --output tectonic.tar.gz
+    TECTONIC_BIN_CACHE_PATH: "${CI_PROJECT_DIR}/tectonic"
-    - tar -xf tectonic.tar.gz
+  cache:
-    - ./tectonic -X compile --keep-logs ./resume.tex
+    policy: pull-push
+    when: on_success
+    paths:
+      - "${TECTONIC_DEPS_CACHE_PATH}"
+      - "${TECTONIC_BIN_CACHE_PATH}"
+  script: |
+    mkdir -p "${CI_PROJECT_DIR}/.cache"
+    mkdir -p "${HOME}/.cache"
+    if [ -r "${TECTONIC_DEPS_CACHE_PATH}" ]; then
+      mv "${TECTONIC_DEPS_CACHE_PATH}" "${HOME}/.cache"
+    fi
+
+    if ! [ -x ./tectonic ]; then
+      echo "Cache miss, tectonic binary not in cache! Redownloading!"
+      apk update
+      apk add curl
+      curl -L0 https://github.com/tectonic-typesetting/tectonic/releases/download/tectonic%400.14.1/tectonic-0.14.1-x86_64-unknown-linux-musl.tar.gz --output tectonic.tar.gz
+      tar -xf tectonic.tar.gz
+    fi
+
+    echo "Compiling resume!"
+    ./tectonic -X compile --keep-logs ./resume.tex
+    echo "Finished compiling resume, saving caches"
+
+    mv "${HOME}/.cache/Tectonic" "${CI_PROJECT_DIR}/.cache/Tectonic"
   artifacts:
+    expire_in: 1 week
     paths:
       - "${RESUME_FILE}"
+
 upload:
   stage: upload
   needs: