use nushell script for pushing container image

flake.nix

@@ -35,6 +35,7 @@
                   pkgs.gnused
                   pkgs.nix
                   pkgs.nodejs-16_x
+                  pkgs.nushell
                   pkgs.podman
                 ];
 
@@ -365,18 +366,14 @@
           apps = {
             push-container =
               let
-                script = pkgs.writeScript "push-container" ''
-                  set | grep -i plugin
-                  set | grep -i DRONE
-                  ls -l "''${1}"
-                  echo -n "''${PLUGIN_PASSWORD}" | podman login --username "''${PLUGIN_USERNAME}" --password-stdin "''${PLUGIN_REGISTRY}"
-                  image=''$(podman load --input "''${1}" | sed -n -e "s/Loaded image:.\\(.*\\)/\\1/p")
-                  podman images
-                  podman tag "''${image}" "''${PLUGIN_REGISTRY}/''${PLUGIN_REPOSITORY}:''${DRONE_BUILD_NUMBER}-''${DRONE_COMMIT_SHA:0:8}"
-                  podman tag "''${image}" "''${PLUGIN_REGISTRY}/''${PLUGIN_REPOSITORY}:latest"
-                  podman images
-                  podman logout "''${PLUGIN_REGISTRY}"
-                '';
+                script = pkgs.writeTextFile
+                  {
+                    name = "push-container";
+                    text = ''
+                      #!${pkgs.nushell}/bin/nu
+                    '' + (builtins.readFile ./push-container.nu);
+                    executable = true;
+                  };
               in
               {
                 type = "app";

push-container.nu

@@ -0,0 +1,87 @@
+def main [
+    input: string # tar.gz file containing container to be pushed to repository
+    ...tags: string # Tags to be added to pushed container
+    --no-latest-tag # Don't add latest tag
+    --no-drone-tag # Don't add tag calculated from DRONE_BUILD_NUMBER and DRONE_COMMIT_SHA
+    --no-github-tag # Don't add tag calculated from GItHUB_RUN_NUMBER and GITHUB_SHA
+] {
+    env
+    print $input
+    print $tags
+    print $no_latest_tag
+    print $no_drone_tag
+    print $no_github_tag
+
+    if not ($input | path exists) {
+        print $"($input) does not exist!"
+        exit 1
+    }
+
+    let tags = if not ($env | get -i PLUGIN_TAGS | is-empty) {
+        $tags | append ($env.PLUGIN_TAGS | split row ',' | str trim)
+    } else {
+        $tags
+    }
+
+    let tags = if (not $no_latest_tag) {
+        $tags | append "latest"
+    } else {
+        $tags
+    }
+
+    let tags = if (
+        (not $no_drone_tag)
+         and
+        (not ($env | get -i DRONE_BUILD_NUMBER | is-empty))
+         and
+        (not ($env | get -i DRONE_COMMIT_SHA | is-empty))
+    ) {
+        $tags | append $"($env.DRONE_BUILD_NUMBER)-($env.DRONE_COMMIT_SHA | str substring 0..8)"
+    } else {
+        $tags
+    }
+
+    let tags = if (
+        (not $no_github_tag)
+         and
+        (not ($env | get -i GITHUB_RUN_NUMBER | is-empty))
+         and
+        (not ($env | get -i GITHUB_SHA | is-empty))
+    ) {
+        $tags | append $"($env.DRONE_BUILD_NUMBER)-($env.DRONE_COMMIT_SHA | str substring 0..8)"
+    } else {
+        $tags
+    }
+
+    print $tags
+
+    if ($env | get -i PLUGIN_PASSWORD | is-empty) {
+        print "No password specified!"
+        exit 1
+    }
+    if ($env | get -i PLUGIN_USERNAME | is-empty) {
+        print "No username specified!"
+        exit 1
+    }
+    if ($env | get -i PLUGIN_REGISTRY | is-empty) {
+        print "No registry specified!"
+        exit 1
+    }
+    if ($env | get -i PLUGIN_REPOSITORY | is-empty) {
+        print "No repositiory specified!"
+        exit 1
+    }
+
+    $env.PLUGIN_PASSWORD | podman login --username $env.PLUGIN_USERNAME --password-stdin $env.PLUGIN_REGISTRY
+    let old_image = (podman load --input $input | parse "Loaded image: {image}" | get 0.image)
+    print $old_image
+    podman images
+    $tags | each {
+        |tag|
+        let new_image = $"($env.PLUGIN_REGISTRY)/($env.PLUGIN_REPOSITORY):($tag)"
+        podman tag $old_image $new_image
+        podman push $new_image
+    }
+    podman images
+    podman logout "''${PLUGIN_REGISTRY}"
+}