fix: Better support distrobox (#160)

We will now have a dedicated alpine based `distrobox` image. Due to
restrictions in how the `/tmp` directory in a `distrobox` image works,
it will not play nicely with generating a local tarball for rebasing a
locally built image. Going further into fixing this would required a
rootful setup and I'd rather leave the `distrobox` method as an easy way
to try out building a recipe for users who are not booted on a
`bluebuild` image.

Extra packages are installed to make the `distrobox` setup quicker and a
`distrobox.ini` file is provided to easily create the container and
export the CLI for use on the host machine. The `podman` binary is
passed into the `distrobox` container so that all images that are built
will be accessible locally and allows rootless operation without extra
setup.

integration-tests/Earthfile

@@ -125,8 +125,7 @@ init:
         --no-git
 
 legacy-base:
-    FROM ../+blue-build-cli-alpine --RELEASE=false
-    RUN apk update --no-cache && apk add bash grep jq sudo coreutils
+    FROM ../+blue-build-cli --RELEASE=false
     ENV BB_TEST_LOCAL_IMAGE=/etc/bluebuild/cli_test-legacy.tar.gz
     ENV CLICOLOR_FORCE=1
 
@@ -140,9 +139,8 @@ legacy-base:
     DO +GEN_KEYPAIR
 
 test-base:
-    FROM ../+blue-build-cli-alpine --RELEASE=false
-    RUN apk update --no-cache && apk add bash grep jq sudo coreutils git && \
-        git config --global user.email "you@example.com" && \
+    FROM ../+blue-build-cli --RELEASE=false
+    RUN git config --global user.email "you@example.com" && \
         git config --global user.name "Your Name"
 
     ENV BB_TEST_LOCAL_IMAGE=/etc/bluebuild/cli_test.tar.gz

integration-tests/mock-scripts/docker

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+print_version_json() {
+  local version="24.0.0"
+  printf '{"Client":{"Version": "%s"}}\n' "$version"
+}
+
+main() {
+  if [[ "$1" == "version" && "$2" == "-f" && "$3" == "json" ]]; then
+    print_version_json
+  elif [[ "$1" == "build" && "$7" == *"cli_test.tar.gz" ]]; then
+    tarpath=$(echo "$7" | awk -F ':' '{print $2}')
+    echo "Exporting image to a tarball (JK JUST A MOCK!)"
+    echo "${tarpath}"
+    touch $tarpath
+  else
+    echo 'Running docker'
+  fi
+}
+
+main "$@"