Select apt packages to install from config.json

build/config.json

@@ -2,5 +2,48 @@
   "user": {
     "user-id": 1001,
     "group-id": 121
-  }
+  },
+  "install": [
+    {
+      "category": "development",
+      "source": "apt",
+      "packages": [
+        "build-essential",
+        "zlib1g-dev",
+        "zstd",
+        "gettext",
+        "libcurl4-openssl-dev",
+        "libpq-dev",
+        "pkg-config",
+        "software-properties-common"
+      ]
+    },
+    {
+      "category": "network-tools",
+      "source": "apt",
+      "packages": [
+        "inetutils-ping",
+        "wget",
+        "openssh-client",
+        "rsync"
+      ]
+    },
+    {
+      "category": "nodejs",
+      "source": "apt",
+      "packages": [
+        "nodejs"
+      ]
+    },
+    {
+      "category": "python",
+      "source": "apt",
+      "packages": [
+        "python3",
+        "python3-pip",
+        "python3-setuptools",
+        "python3-venv"
+      ]
+    }
+  ]
 }

build/config.sh

@@ -1,10 +1,18 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
+function config_file() {
+  echo "$(dirname "${BASH_SOURCE[0]}")/config.json"
+}
+
 function user_id() {
-  jq -r '.user."user-id"' "$(dirname "${BASH_SOURCE[0]}")/config.json"
+  jq -r '.user."user-id"' "$(config_file)"
 }
 
 function group_id() {
-  jq -r '.user."group-id"' "$(dirname "${BASH_SOURCE[0]}")/config.json"
+  jq -r '.user."group-id"' "$(config_file)"
+}
+
+function apt_packages() {
+  jq -r '.install[] | select(.source == "apt") | .packages[]' "$(config_file)" | paste -sd ' ' -
 }

build/install_base.sh

@@ -1,43 +1,27 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-function install_bootstrap() {
+# Required by the build or runner operation
+function install_essentials() {
   apt-get install -y --no-install-recommends \
       ca-certificates \
       curl \
       jq \
-      gnupg
+      gnupg \
+      tar \
+      unzip \
+      zip \
+      apt-transport-https \
+      sudo \
+      dirmngr \
+      locales \
+      gosu \
+      gpg-agent \
+      dumb-init
 }
 
 function install_tools_apt() {
-  apt-get install -y --no-install-recommends \
-    tar \
-    unzip \
-    zip \
-    apt-transport-https \
-    sudo \
-    gpg-agent \
-    software-properties-common \
-    dirmngr \
-    locales \
-    dumb-init \
-    gosu \
-    build-essential \
-    zlib1g-dev \
-    zstd \
-    gettext \
-    libcurl4-openssl-dev \
-    inetutils-ping \
-    wget \
-    openssh-client \
-    python3-pip \
-    python3-setuptools \
-    python3-venv \
-    python3 \
-    nodejs \
-    rsync \
-    libpq-dev \
-    pkg-config
+  apt_packages | xargs apt-get install -y --no-install-recommends
 }
 
 function remove_caches() {
@@ -61,7 +45,7 @@ source "$scripts_dir/tools.sh"
 source "$scripts_dir/config.sh"
 
 apt-get update
-install_bootstrap
+install_essentials
 configure_sources
 
 apt-get update