convert to flake based container

.gitignore

@@ -0,0 +1 @@
+result

Dockerfile

@@ -1,24 +0,0 @@
-ARG GO_VERSION="1.19"
-
-FROM golang:$GO_VERSION-alpine as builder
-
-RUN \
-    set -o errexit -o nounset -o xtrace; \
-    go install github.com/google/go-containerregistry/cmd/crane@latest
-
-FROM alpine:3
-
-RUN \
-    set -o errexit -o nounset -o xtrace; \
-    apk add --no-cache --update \
-        ca-certificates \
-        dumb-init \
-        gzip \
-        tzdata \
-        su-exec\
-    ;
-
-ADD docker-entrypoint.sh /bin/
-COPY --from=builder /go/bin/crane /bin/
-
-ENTRYPOINT docker-entrypoint.sh

docker-entrypoint.sh

@@ -1,12 +0,0 @@
-#!/usr/bin/dumb-init /bin/sh
-# shellcheck shell=sh
-
-set -o errexit -o nounset
-
-crane auth login -u "$PLUGIN_USERNAME" -p "$PLUGIN_PASSWORD" "$PLUGIN_REPO"
-
-set -o xtrace
-
-gunzip < image.tar.gz > image.tar
-
-crane push image.tar "$PLUGIN_REPO/$PLUGIN_IMAGE:$PLUGIN_TAG"

flake.lock

@@ -0,0 +1,43 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1667395993,
+        "narHash": "sha256-nuEHfE/LcWyuSWnS8t12N1wc105Qtau+/OdUAjtQ0rA=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "5aed5285a952e0b949eb3ba02c12fa4fcfef535f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1670064435,
+        "narHash": "sha256-+ELoY30UN+Pl3Yn7RWRPabykwebsVK/kYE9JsIsUMxQ=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "61a8a98e6d557e6dd7ed0cdb54c3a3e3bbc5e25c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  description = "an container for mdbook with the toc plugin";
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    let inherit (flake-utils.lib) eachSystem system;
+    in eachSystem [ system.x86_64-linux ] (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+        entrypoint = pkgs.writeScriptBin "entrypoint.sh" ''
+          #!/bin/env sh
+          set -o errexit
+          set -o pipefail
+          set -o nounset
+          set -o xtrace
+
+          # Login to the registry
+          crane auth login -u "$PLUGIN_USERNAME" -p "$PLUGIN_PASSWORD" "$PLUGIN_REPO"
+
+          # Build container
+          nix build --extra-experimental-features nix-command --extra-experimental-features flake ".#$PLUGIN_PACKAGE"
+
+          # Convert to tar
+          gunzip < image.tar.gz > image.tar
+
+          # Push container
+          crane push image.tar "$PLUGIN_REPO/$PLUGIN_IMAGE:$PLUGIN_TAG"
+        '';
+      in {
+        packages = {
+          docker = pkgs.dockerTools.buildLayeredImage {
+            name = "push-nix-container";
+            contents = [
+              (pkgs.buildEnv {
+                name = "build-env";
+                paths = with pkgs; [ busybox nixUnstable crane git ];
+              })
+            ];
+            config.Cmd = [ "${entrypoint}/bin/entrypoint.sh" ];
+          };
+        };
+      });
+}