release.go

package finalize

import (
	"github.com/blang/semver"
)

type Versions interface {
	HasGem(string) (bool, error)
	GemMajorVersion(string) (int, error)
	HasGemVersion(string, ...string) (bool, error)
}

func (f *Finalizer) GenerateReleaseYaml() (map[string]map[string]string, error) {
	hasThin, err := f.Versions.HasGem("thin")
	if err != nil {
		return nil, err
	}
	hasRails4, err := f.Versions.HasGemVersion("rails", ">=4.0.0-beta")
	if err != nil {
		return nil, err
	}
	hasRails3, err := f.Versions.HasGemVersion("rails", ">=3.0.0")
	if err != nil {
		return nil, err
	}
	hasRails2, err := f.Versions.HasGemVersion("rails", ">=2.0.0")
	if err != nil {
		return nil, err
	}
	hasRack, err := f.Versions.HasGem("rack")
	if err != nil {
		return nil, err
	}
	processTypes := map[string]string{
		"rake":    "bundle exec rake",
		"console": "bundle exec irb",
	}
	if hasRails4 {
		processTypes["worker"] = "bundle exec rake jobs:work"
		processTypes["console"] = "bin/rails console"
		processTypes["web"] = "bin/rails server -b 0.0.0.0 -p $PORT -e $RAILS_ENV"
	} else if hasRails3 {
		processTypes["worker"] = "bundle exec rake jobs:work"
		processTypes["console"] = "bundle exec rails console"
		processTypes["web"] = "bundle exec rails server -p $PORT"
		if hasThin {
			processTypes["web"] = "bundle exec thin start -R config.ru -e $RAILS_ENV -p $PORT"
		}
	} else if hasRails2 {
		processTypes["worker"] = "bundle exec rake jobs:work"
		processTypes["console"] = "bundle exec script/console"
		processTypes["web"] = "bundle exec ruby script/server -p $PORT"
		if hasThin {
			processTypes["web"] = "bundle exec thin start -e $RAILS_ENV -p $PORT"
		}
	} else if hasRack {
		processTypes["web"] = "bundle exec rackup config.ru -p $PORT"
		if hasThin {
			processTypes["web"] = "bundle exec thin start -R config.ru -e $RACK_ENV -p $PORT"
		}
	}
	return map[string]map[string]string{
		"default_process_types": processTypes,
	}, nil
}

func mustParse(s string) semver.Version {
	semver, err := semver.ParseTolerant(s)
	if err != nil {
		panic(err)
	}
	return semver
}