copy paste plan.sh -> plan.ps1 and change for Powershell

Signed-off-by: Miah Johnson <miah@chia-pet.org>

habitat/plan.ps1

@@ -0,0 +1,56 @@
+$pkg_name="inspec"
+$pkg_origin="chef"
+$pkg_version=$(cat "$PLAN_CONTEXT/../VERSION")
+$pkg_description="InSpec is an open-source testing framework for infrastructure
+  with a human- and machine-readable language for specifying compliance,
+  security and policy requirements."
+$pkg_upstream_url="https://www.inspec.io/"
+$pkg_maintainer="The Habitat Maintainers <humans@habitat.sh>"
+$pkg_license=('Apache-2.0')
+$pkg_deps=@(
+  "core/coreutils",
+  "core/cacerts",
+  "core/git",
+  "core/ruby",
+  "core/bash"
+)
+$pkg_build_deps=@(
+  "core/gcc",
+  "core/make",
+  "core/readline",
+  "core/sed"
+)
+$pkg_bin_dirs=@("bin")
+
+do_setup_environment() {
+  build_line 'Setting GEM_HOME="$pkg_prefix/lib"'
+  export GEM_HOME="$pkg_prefix/lib"
+
+  build_line "Setting GEM_PATH=$GEM_HOME"
+  export GEM_PATH="$GEM_HOME"
+}
+
+function Invoke-Unpack {
+  mkdir "$HAB_CACHE_SRC_PATH/$pkg_dirname"
+  Copy-Item "$PLAN_CONTEXT"/.. "$HAB_CACHE_SRC_PATH/$pkg_dirname/" -Recurse
+}
+
+function Invoke-Build {
+  Push-Location "$HAB_CACHE_SRC_PATH/$pkg_dirname/"
+    gem build inspec.gemspec
+  Pop-Location 
+  Push-Location "$HAB_CACHE_SRC_PATH/$pkg_dirname/inspec-bin"
+    gem build inspec-bin.gemspec
+  Pop-Location
+}
+
+function Invoke-Install {
+  # MUST install inspec first because inspec-bin depends on it via gemspec
+  Push-Location "$HAB_CACHE_SRC_PATH/$pkg_dirname/"
+    gem install inspec-*.gem --no-document
+  Pop-Location
+
+  Push-Location "$HAB_CACHE_SRC_PATH/$pkg_dirname/inspec-bin"
+    gem install inspec-bin*.gem --no-document
+  Pop-Location
+}