chore(makefile): add bootstrap targets for normal use and CI environments

Brewfile.ci

@@ -0,0 +1,3 @@
+# frozen_string_literal: true
+
+brew 'python'

Makefile

@@ -1,3 +1,4 @@
+PIP := $(shell command -v pip3 || command -v pip)
 SOURCES := $(shell \
 	find * \
 	-not -path 'sources/*' \
@@ -40,6 +41,22 @@ SHELL := env \
 # Default target
 .DEFAULT_GOAL := build
 
+#
+# Bootstrap
+#
+
+bootstrap: bootstrap-brew
+bootstrap-ci: bootstrap-brew bootstrap-brew-ci bootstrap-pip
+
+bootstrap-brew:
+	brew bundle
+
+bootstrap-brew-ci:
+	brew bundle --file Brewfile.ci
+
+bootstrap-pip:
+	$(PIP) install -r requirements-ci.txt
+
 #
 # Tools
 #

requirements-ci.txt

@@ -0,0 +1 @@
+dmgbuild