[feature] add habitat utility for infrastructure free packaging

Author: gitgik

habitat/default.toml

@@ -0,0 +1 @@
+listening_port=8080

habitat/plan.sh

@@ -0,0 +1,45 @@
+pkg_origin=gitgik
+pkg_name=django-api
+pkg_version=0.1.0
+pkg_maintainer="jeegiks@gmail.com"
+pkg_upstream_url="https://github.com/gitgik/django-rest-api.git"
+pkg_exports=([port]=listening_port)
+pkg_exposes=(port)
+pkg_build_deps=(core/virtualenv)
+pkg_deps=(core/python core/coreutils)
+pkg_licence=('MIT')
+pkg_interpreters=(bin/python3)
+
+do_verify () {
+  return 0
+}
+
+do_clean() {
+  return 0
+}
+
+do_unpack() {
+  # copy the contents of the source directory to the habitat cache path
+  PROJECT_ROOT="${PLAN_CONTEXT}/.."
+
+  mkdir -p $pkg_prefix
+  build_line "Copying project data to $pkg_prefix/"
+  cp -r $PROJECT_ROOT/project $pkg_prefix/
+  cp -r $PROJECT_ROOT/rest_api $pkg_prefix/
+  cp -r $PROJECT_ROOT/*.py $pkg_prefix/
+  cp -r $PROJECT_ROOT/requirements.txt $pkg_prefix/
+  build_line "Copying .env file with preset variables..."
+}
+
+do_build() {
+  return 0
+}
+
+do_install() {
+  cd $pkg_prefix
+  build_line "Creating virtual environment..."
+  virtualenv venv
+  source venv/bin/activate
+  pip3 install -r requirements.txt
+  build_line "Done installing requirements..."
+}