feat(cli) kong prepare cli command to prepare prefix

kong-0.10.3-0.rockspec

@@ -63,6 +63,7 @@ build = {
     ["kong.cmd.reload"] = "kong/cmd/reload.lua",
     ["kong.cmd.restart"] = "kong/cmd/restart.lua",
     ["kong.cmd.compile"] = "kong/cmd/compile.lua",
+    ["kong.cmd.prepare"] = "kong/cmd/prepare.lua",
     ["kong.cmd.migrations"] = "kong/cmd/migrations.lua",
     ["kong.cmd.health"] = "kong/cmd/health.lua",
     ["kong.cmd.version"] = "kong/cmd/version.lua",

kong/cmd/init.lua

@@ -20,6 +20,7 @@ local cmds = {
   health = true,
   check = true,
   compile = true,
+  prepare = true,
   migrations = true,
   version = true,
   roar = true

kong/cmd/prepare.lua

@@ -0,0 +1,30 @@
+local prefix_handler = require "kong.cmd.utils.prefix_handler"
+local conf_loader = require "kong.conf_loader"
+local log = require "kong.cmd.utils.log"
+
+local function execute(args)
+  local conf = assert(conf_loader(args.conf, {
+    prefix = args.prefix
+  }))
+
+  local ok, err = prefix_handler.prepare_prefix(conf, args.nginx_conf)
+  if not ok then
+    log.verbose("could not prepare Kong")
+    error(err) -- report to main error handler
+  end
+end
+
+local lapp = [[
+Usage: kong prepare [OPTIONS]
+
+Prepares the Kong prefix in the configured prefix directory.
+
+Options:
+ -c,--conf    (optional string) configuration file
+ -p,--prefix  (optional string) override prefix directory
+]]
+
+return {
+  lapp = lapp,
+  execute = execute
+}

spec/02-integration/02-cmd/10-prepare_spec.lua

@@ -0,0 +1,23 @@
+local helpers = require "spec.helpers"
+
+describe("kong prepare", function()
+  setup(function()
+    helpers.clean_prefix()
+  end)
+  teardown(function()
+    helpers.clean_prefix()
+  end)
+
+  it("prepares prefix with default conf/prefix", function()
+    assert(helpers.kong_exec "prepare")
+  end)
+
+  describe("errors", function()
+    it("prepare inexistent Kong conf file", function()
+      local ok, stderr = helpers.kong_exec "prepare --conf foobar.conf"
+      assert.False(ok)
+      assert.is_string(stderr)
+      assert.matches("Error: no file at: foobar.conf", stderr, nil, true)
+    end)
+  end)
+end)