apiserver: install dependent libraries upon deploy

.github/workflows/apiserver.yml

@@ -57,6 +57,13 @@ jobs:
           BUNDLE_PATH: vendor/bundle
           BUNDLE_WITH: ci
 
+      - name: Infer library dependencies
+        run: bundle exec debendencies . | tee dpkg-dependencies.txt
+        working-directory: apiserver
+        env:
+          BUNDLE_PATH: vendor/bundle
+          BUNDLE_WITH: ci
+
       - name: Create tarball
         run: >
           tar

ansible/files/apiserver-deployer.sh

@@ -36,6 +36,11 @@ else
     rm -rf "${TARGET_DIR}.tmp"
     mkdir "${TARGET_DIR}.tmp"
     tar --use-compress-program=unzstd -xf "/tmp/$ASSET_NAME" -C "${TARGET_DIR}.tmp"
+    DPKG_DEPENDENCIES=($(cat "${TARGET_DIR}.tmp/dpkg-dependencies.txt"))
+    if [[ -z "${DPKG_DEPENDENCIES[*]}" ]]; then
+        echo "Installing dependencies: ${DPKG_DEPENDENCIES[*]}"
+        apt satisfy -y --no-install-recommends --no-install-suggests "${DPKG_DEPENDENCIES[@]}"
+    fi
     rm "/tmp/$ASSET_NAME"
     mv "${TARGET_DIR}.tmp" "$TARGET_DIR"
 

apiserver/Gemfile

@@ -8,4 +8,5 @@ gem "jwt"
 
 group :ci, optional: true do
   gem "rufo"
+  gem "debendencies"
 end

apiserver/Gemfile.lock

@@ -2,11 +2,24 @@ GEM
   remote: https://rubygems.org/
   specs:
     base64 (0.2.0)
+    debendencies (1.0.0)
+      fileutils (~> 1)
+      json (~> 2)
+      open3 (>= 0.1, < 2)
+      optparse (>= 0.4, < 2)
+      set (~> 1)
+      stringio (~> 3)
+      tempfile (>= 0.1, < 2)
+      tmpdir (>= 0.1, < 2)
+    fileutils (1.7.2)
+    json (2.7.2)
     jwt (2.8.2)
       base64
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.7.3)
+    open3 (0.2.1)
+    optparse (0.5.0)
     puma (6.4.2)
       nio4r (~> 2.0)
     rack (3.1.7)
@@ -17,18 +30,24 @@ GEM
       rack (>= 3.0.0)
     ruby2_keywords (0.0.5)
     rufo (0.18.0)
+    set (1.1.0)
     sinatra (4.0.0)
       mustermann (~> 3.0)
       rack (>= 3.0.0, < 4)
       rack-protection (= 4.0.0)
       rack-session (>= 2.0.0, < 3)
       tilt (~> 2.0)
+    stringio (3.1.1)
+    tempfile (0.2.1)
     tilt (2.4.0)
+    tmpdir (0.2.0)
+      fileutils
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  debendencies
   jwt
   puma
   rufo