chore(workflow): convert Makefile to Justfile

Just (https://github.com/casey/just) is a command runner similar to
Make that's much more concise and has more features.

This commit replaces the project Makefile with a Justfile, and updates
documentation to alert people to this change.

Signed-off-by: vados <[email protected]>

Justfile

@@ -0,0 +1,111 @@
+cargo := env_var_or_default("CARGO", "cargo")
+cargo_get := env_var_or_default("CARGO_GET", "cargo-get")
+cargo_watch := env_var_or_default("CARGO_WATCH", "cargo-watch")
+docker := env_var_or_default("DOCKER", "docker")
+git := env_var_or_default("GIT", "git")
+just := env_var_or_default("JUST", just_executable())
+
+changelog_path := "CHANGELOG"
+
+default:
+    {{just}} --list
+
+###########
+# Tooling #
+###########
+
+_check-installed-version tool msg:
+    #!/usr/bin/env -S bash -euo pipefail
+    if [ -z "$(command -v {{tool}})" ]; then
+      echo "{{msg}}";
+      exit 1;
+    fi
+
+@_check-tool-cargo:
+    {{just}} _check-installed-version {{cargo}} "'cargo' not available, please install the Rust toolchain (see: https://github.com/rust-lang/cargo/)";
+
+@_check-tool-cargo-watch:
+    {{just}} _check-installed-version {{cargo_watch}} "'cargo-watch' not available, please install cargo-watch (https://github.com/passcod/cargo-watch)"
+
+@_check-tool-cargo-get:
+    {{just}} _check-installed-version {{cargo_get}} "'cargo-get' not available, please install cargo-get (https://crates.io/crates/cargo-get)"
+
+#########
+# Build #
+#########
+
+version := `grep 'version' Cargo.toml | head -n 1 | sed -rn 's/version\s*=\s*(.*)/\1/p'`
+
+# NOTE: we can't use this as the official version getter until
+# see: https://github.com/nicolaiunrein/cargo-get/issues/14
+@get-version: _check-tool-cargo-get
+    cargo get package.version
+
+print-version:
+    #!/usr/bin/env -S bash -euo pipefail
+    echo -n `{{just}} get-version`
+
+changelog:
+    {{git}} cliff --unreleased --tag=$(VERSION) --prepend=$(CHANGELOG_FILE_PATH)
+
+build:
+    {{cargo}} build
+
+build-watch: _check-tool-cargo _check-tool-cargo-watch
+    {{cargo_watch}} -x "build $(CARGO_BUILD_FLAGS)" --watch src
+
+build-test-watch: _check-tool-cargo _check-tool-cargo-watch
+    {{cargo_watch}} -x "test $(CARGO_BUILD_FLAGS)" --watch src
+
+package:
+    {{cargo}} pgrx package
+
+test:
+    {{cargo}} test
+    {{cargo}} pgrx test
+
+##########
+# Docker #
+##########
+
+pg_image_version := env_var_or_default("POSTGRES_IMAGE_VERSION", "15.1.0")
+pg_image_tag := env_var_or_default("POSGRES_IMAGE_VERSION", pg_image_version + "-alpine")
+
+pgkit_image_name := env_var_or_default("PGKIT_IMAGE_NAME", "postgres")
+pgkit_image_tag := env_var_or_default("PGKIT_IMAGE_TAG", pg_image_version + "-pg_idkit=" + version)
+pgkit_image_name_full := env_var_or_default("PGKIT_IMAGE_NAME_FULL", pgkit_image_name + ":" + pgkit_image_tag)
+pgkit_dockerfile_path := env_var_or_default("PGKIT_DOCKERFILE_PATH", "infra" / "docker" / pgkit_image_tag + ".Dockerfile")
+
+ci_dockerfile_path := env_var_or_default("CI_DOCKERFILE_PATH", "infra" / "docker" / "ci.Dockerfile")
+ci_image_name := env_var_or_default("CI_IMAGE_NAME", "ghcr.io/vadosware/pg_idkit/builder")
+ci_image_tag := env_var_or_default("CI_IMAGE_TAG", "0.x.x")
+ci_image_name_full := env_var_or_default("CI_IMAGE_NAME_FULL", ci_image_name + ":" + ci_image_tag)
+
+docker_password_path := env_var_or_default("DOCKER_PASSWORD_PATH", "secrets/docker/password.secret")
+docker_username_path := env_var_or_default("DOCKER_USERNAME_PATH", "secrets/docker/username.secret")
+docker_image_registry := env_var_or_default("DOCKER_IMAGE_REGISTRY", "ghcr.io/vadosware/pg_idkit")
+docker_config_dir := env_var_or_default("DOCKER_CONFIG", "secrets/docker")
+
+## Ensure that that a given file is present
+_ensure-file file:
+    #!/usr/bin/env -S bash -euo pipefail
+    @if [ ! -f "{{file}}" ]; then
+      echo "[error] file [{{file}}] is required, but missing";
+      exit 1;
+    fi;
+
+# Log in with docker using local credentials
+docker-login:
+    {{just}} ensure-file {{docker_password_path}}
+    {{just}} ensure-file {{docker_username_path}}
+    cat {{docker_password_path}} | {{docker}} login {{docker_image_registry}} -u `cat {{docker_username_path}}` --password-stdin
+    cp {{docker_config_dir}}/config.json {{docker_config_dir}}/.dockerconfigjson
+
+image:
+    {{docker}} build -f {{pgkit_dockerfile_path}} -t {{pgkit_image_name_full}}
+
+build-ci-image:
+    {{docker}} build -f {{ci_dockerfile_path}} -t {{ci_image_name_full}} .
+
+push-ci-image:
+    {{docker}} push {{ci_image_name_full}}