android/package_ctx.go - android_build_soong - Gitiles

 // Copyright 2015 Google Inc. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 package android

 import (
 	"fmt"
 	"strings"

 	"github.com/google/blueprint"

 	"android/soong/remoteexec"
 )

 // PackageContext is a wrapper for blueprint.PackageContext that adds
 // some android-specific helper functions.
 type PackageContext struct {
 	blueprint.PackageContext
 }

 func NewPackageContext(pkgPath string) PackageContext {
 	return PackageContext{blueprint.NewPackageContext(pkgPath)}
 }

 // configErrorWrapper can be used with Path functions when a Context is not
 // available. A Config can be provided, and errors are stored as a list for
 // later retrieval.
 //
 // The most common use here will be with VariableFunc, where only a config is
 // provided, and an error should be returned.
 type configErrorWrapper struct {
 	pctx   PackageContext
 	config Config
 	errors []error
 }

 var _ PathContext = &configErrorWrapper{}
 var _ errorfContext = &configErrorWrapper{}
 var _ PackageVarContext = &configErrorWrapper{}
 var _ PackagePoolContext = &configErrorWrapper{}
 var _ PackageRuleContext = &configErrorWrapper{}

 func (e *configErrorWrapper) Config() Config {
 	return e.config
 }
 func (e *configErrorWrapper) Errorf(format string, args ...interface{}) {
 	e.errors = append(e.errors, fmt.Errorf(format, args...))
 }
 func (e *configErrorWrapper) AddNinjaFileDeps(deps ...string) {
 	e.config.addNinjaFileDeps(deps...)
 }

 type PackageVarContext interface {
 	PathContext
 	errorfContext
 }

 type PackagePoolContext PackageVarContext
 type PackageRuleContext PackageVarContext

 // VariableFunc wraps blueprint.PackageContext.VariableFunc, converting the interface{} config
 // argument to a PackageVarContext.
 func (p PackageContext) VariableFunc(name string,
 	f func(PackageVarContext) string) blueprint.Variable {

 	return p.PackageContext.VariableFunc(name, func(config interface{}) (string, error) {
 		ctx := &configErrorWrapper{p, config.(Config), nil}
 		ret := f(ctx)
 		if len(ctx.errors) > 0 {
 			return "", ctx.errors[0]
 		}
 		return ret, nil
 	})
 }

 // PoolFunc wraps blueprint.PackageContext.PoolFunc, converting the interface{} config
 // argument to a Context that supports Config().
 func (p PackageContext) PoolFunc(name string,
 	f func(PackagePoolContext) blueprint.PoolParams) blueprint.Pool {

 	return p.PackageContext.PoolFunc(name, func(config interface{}) (blueprint.PoolParams, error) {
 		ctx := &configErrorWrapper{p, config.(Config), nil}
 		params := f(ctx)
 		if len(ctx.errors) > 0 {
 			return params, ctx.errors[0]
 		}
 		return params, nil
 	})
 }

 // RuleFunc wraps blueprint.PackageContext.RuleFunc, converting the interface{} config
 // argument to a Context that supports Config(), and provides a default Pool if none is
 // specified.
 func (p PackageContext) RuleFunc(name string,
 	f func(PackageRuleContext) blueprint.RuleParams, argNames ...string) blueprint.Rule {

 	return p.PackageContext.RuleFunc(name, func(config interface{}) (blueprint.RuleParams, error) {
 		ctx := &configErrorWrapper{p, config.(Config), nil}
 		params := f(ctx)
 		if len(ctx.errors) > 0 {
 			return params, ctx.errors[0]
 		}
 		if ctx.Config().UseRemoteBuild() && params.Pool == nil {
 			// When USE_GOMA=true or USE_RBE=true are set and the rule is not supported by
 			// goma/RBE, restrict jobs to the local parallelism value
 			params.Pool = localPool
 		}
 		return params, nil
 	}, argNames...)
 }

 // SourcePathVariable returns a Variable whose value is the source directory
 // appended with the supplied path. It may only be called during a Go package's
 // initialization - either from the init() function or as part of a
 // package-scoped variable's initialization.
 func (p PackageContext) SourcePathVariable(name, path string) blueprint.Variable {
 	return p.VariableFunc(name, func(ctx PackageVarContext) string {
 		p, err := safePathForSource(ctx, path)
 		if err != nil {
 			ctx.Errorf("%s", err.Error())
 		}
 		return p.String()
 	})
 }

 // SourcePathsVariable returns a Variable whose value is the source directory
 // appended with the supplied paths, joined with separator. It may only be
 // called during a Go package's initialization - either from the init()
 // function or as part of a package-scoped variable's initialization.
 func (p PackageContext) SourcePathsVariable(name, separator string, paths ...string) blueprint.Variable {
 	return p.VariableFunc(name, func(ctx PackageVarContext) string {
 		var ret []string
 		for _, path := range paths {
 			p, err := safePathForSource(ctx, path)
 			if err != nil {
 				ctx.Errorf("%s", err.Error())
 			}
 			ret = append(ret, p.String())
 		}
 		return strings.Join(ret, separator)
 	})
 }

 // SourcePathVariableWithEnvOverride returns a Variable whose value is the source directory
 // appended with the supplied path, or the value of the given environment variable if it is set.
 // The environment variable is not required to point to a path inside the source tree.
 // It may only be called during a Go package's initialization - either from the init() function or
 // as part of a package-scoped variable's initialization.
 func (p PackageContext) SourcePathVariableWithEnvOverride(name, path, env string) blueprint.Variable {
 	return p.VariableFunc(name, func(ctx PackageVarContext) string {
 		p, err := safePathForSource(ctx, path)
 		if err != nil {
 			ctx.Errorf("%s", err.Error())
 		}
 		return ctx.Config().GetenvWithDefault(env, p.String())
 	})
 }

 // HostBinToolVariable returns a Variable whose value is the path to a host tool
 // in the bin directory for host targets. It may only be called during a Go
 // package's initialization - either from the init() function or as part of a
 // package-scoped variable's initialization.
 func (p PackageContext) HostBinToolVariable(name, path string) blueprint.Variable {
 	return p.VariableFunc(name, func(ctx PackageVarContext) string {
 		return ctx.Config().HostToolPath(ctx, path).String()
 	})
 }

 // HostJNIToolVariable returns a Variable whose value is the path to a host tool
 // in the lib directory for host targets. It may only be called during a Go
 // package's initialization - either from the init() function or as part of a
 // package-scoped variable's initialization.
 func (p PackageContext) HostJNIToolVariable(name, path string) blueprint.Variable {
 	return p.VariableFunc(name, func(ctx PackageVarContext) string {
 		return ctx.Config().HostJNIToolPath(ctx, path).String()
 	})
 }

 // HostJavaToolVariable returns a Variable whose value is the path to a host
 // tool in the frameworks directory for host targets. It may only be called
 // during a Go package's initialization - either from the init() function or as
 // part of a package-scoped variable's initialization.
 func (p PackageContext) HostJavaToolVariable(name, path string) blueprint.Variable {
 	return p.VariableFunc(name, func(ctx PackageVarContext) string {
 		return ctx.Config().HostJavaToolPath(ctx, path).String()
 	})
 }

 // IntermediatesPathVariable returns a Variable whose value is the intermediate
 // directory appended with the supplied path. It may only be called during a Go
 // package's initialization - either from the init() function or as part of a
 // package-scoped variable's initialization.
 func (p PackageContext) IntermediatesPathVariable(name, path string) blueprint.Variable {
 	return p.VariableFunc(name, func(ctx PackageVarContext) string {
 		return PathForIntermediates(ctx, path).String()
 	})
 }

 // PrefixedExistentPathsForSourcesVariable returns a Variable whose value is the
 // list of present source paths prefixed with the supplied prefix. It may only
 // be called during a Go package's initialization - either from the init()
 // function or as part of a package-scoped variable's initialization.
 func (p PackageContext) PrefixedExistentPathsForSourcesVariable(
 	name, prefix string, paths []string) blueprint.Variable {

 	return p.VariableFunc(name, func(ctx PackageVarContext) string {
 		paths := ExistentPathsForSources(ctx, paths)
 		return JoinWithPrefix(paths.Strings(), prefix)
 	})
 }

 // AndroidStaticRule is an alias for StaticRule.
 func (p PackageContext) AndroidStaticRule(name string, params blueprint.RuleParams,
 	argNames ...string) blueprint.Rule {
 	return p.StaticRule(name, params, argNames...)
 }

 // StaticRule wraps blueprint.StaticRule and provides a default Pool if none is specified.
 func (p PackageContext) StaticRule(name string, params blueprint.RuleParams,
 	argNames ...string) blueprint.Rule {
 	return p.RuleFunc(name, func(PackageRuleContext) blueprint.RuleParams {
 		return params
 	}, argNames...)
 }

 // RemoteRuleSupports configures rules with whether they have Goma and/or RBE support.
 type RemoteRuleSupports struct {
 	Goma bool
 	RBE  bool
 }

 // AndroidRemoteStaticRule wraps blueprint.StaticRule but uses goma or RBE's parallelism if goma or RBE are enabled
 // and the appropriate SUPPORTS_* flag is set.
 func (p PackageContext) AndroidRemoteStaticRule(name string, supports RemoteRuleSupports, params blueprint.RuleParams,
 	argNames ...string) blueprint.Rule {

 	return p.PackageContext.RuleFunc(name, func(config interface{}) (blueprint.RuleParams, error) {
 		ctx := &configErrorWrapper{p, config.(Config), nil}
 		if ctx.Config().UseGoma() && !supports.Goma {
 			// When USE_GOMA=true is set and the rule is not supported by goma, restrict jobs to the
 			// local parallelism value
 			params.Pool = localPool
 		}

 		if ctx.Config().UseRBE() && !supports.RBE {
 			// When USE_RBE=true is set and the rule is not supported by RBE, restrict jobs to the
 			// local parallelism value
 			params.Pool = localPool
 		}

 		return params, nil
 	}, argNames...)
 }

 // RemoteStaticRules returns a pair of rules based on the given RuleParams, where the first rule is a
 // locally executable rule and the second rule is a remotely executable rule. commonArgs are args
 // used for both the local and remotely executable rules. reArgs are used only for remote
 // execution.
 func (p PackageContext) RemoteStaticRules(name string, ruleParams blueprint.RuleParams, reParams *remoteexec.REParams, commonArgs []string, reArgs []string) (blueprint.Rule, blueprint.Rule) {
 	ruleParamsRE := ruleParams
 	ruleParams.Command = strings.ReplaceAll(ruleParams.Command, "$reTemplate", "")
 	ruleParamsRE.Command = strings.ReplaceAll(ruleParamsRE.Command, "$reTemplate", reParams.Template())

 	return p.AndroidStaticRule(name, ruleParams, commonArgs...),
 		p.AndroidRemoteStaticRule(name+"RE", RemoteRuleSupports{RBE: true}, ruleParamsRE, append(commonArgs, reArgs...)...)
 }

 // MultiCommandStaticRules returns a pair of rules based on the given RuleParams, where the first
 // rule is a locally executable rule and the second rule is a remotely executable rule. This
 // function supports multiple remote execution wrappers placed in the template when commands are
 // chained together with &&. commonArgs are args used for both the local and remotely executable
 // rules. reArgs are args used only for remote execution.
 func (p PackageContext) MultiCommandRemoteStaticRules(name string, ruleParams blueprint.RuleParams, reParams map[string]*remoteexec.REParams, commonArgs []string, reArgs []string) (blueprint.Rule, blueprint.Rule) {
 	ruleParamsRE := ruleParams
 	for k, v := range reParams {
 		ruleParams.Command = strings.ReplaceAll(ruleParams.Command, k, "")
 		ruleParamsRE.Command = strings.ReplaceAll(ruleParamsRE.Command, k, v.Template())
 	}

 	return p.AndroidStaticRule(name, ruleParams, commonArgs...),
 		p.AndroidRemoteStaticRule(name+"RE", RemoteRuleSupports{RBE: true}, ruleParamsRE, append(commonArgs, reArgs...)...)
 }

 // StaticVariableWithEnvOverride creates a static variable that evaluates to the value of the given
 // environment variable if set, otherwise the given default.
 func (p PackageContext) StaticVariableWithEnvOverride(name, envVar, defaultVal string) blueprint.Variable {
 	return p.VariableFunc(name, func(ctx PackageVarContext) string {
 		return ctx.Config().GetenvWithDefault(envVar, defaultVal)
 	})
 }
	// Copyright 2015 Google Inc. All rights reserved.
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	package android

	import (
	"fmt"
	"strings"

	"github.com/google/blueprint"

	"android/soong/remoteexec"
	)

	// PackageContext is a wrapper for blueprint.PackageContext that adds
	// some android-specific helper functions.
	type PackageContext struct {
	blueprint.PackageContext
	}

	func NewPackageContext(pkgPath string) PackageContext {
	return PackageContext{blueprint.NewPackageContext(pkgPath)}
	}

	// configErrorWrapper can be used with Path functions when a Context is not
	// available. A Config can be provided, and errors are stored as a list for
	// later retrieval.
	//
	// The most common use here will be with VariableFunc, where only a config is
	// provided, and an error should be returned.
	type configErrorWrapper struct {
	pctx PackageContext
	config Config
	errors []error
	}

	var _ PathContext = &configErrorWrapper{}
	var _ errorfContext = &configErrorWrapper{}
	var _ PackageVarContext = &configErrorWrapper{}
	var _ PackagePoolContext = &configErrorWrapper{}
	var _ PackageRuleContext = &configErrorWrapper{}

	func (e *configErrorWrapper) Config() Config {
	return e.config
	}
	func (e *configErrorWrapper) Errorf(format string, args ...interface{}) {
	e.errors = append(e.errors, fmt.Errorf(format, args...))
	}
	func (e *configErrorWrapper) AddNinjaFileDeps(deps ...string) {
	e.config.addNinjaFileDeps(deps...)
	}

	type PackageVarContext interface {
	PathContext
	errorfContext
	}

	type PackagePoolContext PackageVarContext
	type PackageRuleContext PackageVarContext

	// VariableFunc wraps blueprint.PackageContext.VariableFunc, converting the interface{} config
	// argument to a PackageVarContext.
	func (p PackageContext) VariableFunc(name string,
	f func(PackageVarContext) string) blueprint.Variable {

	return p.PackageContext.VariableFunc(name, func(config interface{}) (string, error) {
	ctx := &configErrorWrapper{p, config.(Config), nil}
	ret := f(ctx)
	if len(ctx.errors) > 0 {
	return "", ctx.errors[0]
	}
	return ret, nil
	})
	}

	// PoolFunc wraps blueprint.PackageContext.PoolFunc, converting the interface{} config
	// argument to a Context that supports Config().
	func (p PackageContext) PoolFunc(name string,
	f func(PackagePoolContext) blueprint.PoolParams) blueprint.Pool {

	return p.PackageContext.PoolFunc(name, func(config interface{}) (blueprint.PoolParams, error) {
	ctx := &configErrorWrapper{p, config.(Config), nil}
	params := f(ctx)
	if len(ctx.errors) > 0 {
	return params, ctx.errors[0]
	}
	return params, nil
	})
	}

	// RuleFunc wraps blueprint.PackageContext.RuleFunc, converting the interface{} config
	// argument to a Context that supports Config(), and provides a default Pool if none is
	// specified.
	func (p PackageContext) RuleFunc(name string,
	f func(PackageRuleContext) blueprint.RuleParams, argNames ...string) blueprint.Rule {

	return p.PackageContext.RuleFunc(name, func(config interface{}) (blueprint.RuleParams, error) {
	ctx := &configErrorWrapper{p, config.(Config), nil}
	params := f(ctx)
	if len(ctx.errors) > 0 {
	return params, ctx.errors[0]
	}
	if ctx.Config().UseRemoteBuild() && params.Pool == nil {
	// When USE_GOMA=true or USE_RBE=true are set and the rule is not supported by
	// goma/RBE, restrict jobs to the local parallelism value
	params.Pool = localPool
	}
	return params, nil
	}, argNames...)
	}

	// SourcePathVariable returns a Variable whose value is the source directory
	// appended with the supplied path. It may only be called during a Go package's
	// initialization - either from the init() function or as part of a
	// package-scoped variable's initialization.
	func (p PackageContext) SourcePathVariable(name, path string) blueprint.Variable {
	return p.VariableFunc(name, func(ctx PackageVarContext) string {
	p, err := safePathForSource(ctx, path)
	if err != nil {
	ctx.Errorf("%s", err.Error())
	}
	return p.String()
	})
	}

	// SourcePathsVariable returns a Variable whose value is the source directory
	// appended with the supplied paths, joined with separator. It may only be
	// called during a Go package's initialization - either from the init()
	// function or as part of a package-scoped variable's initialization.
	func (p PackageContext) SourcePathsVariable(name, separator string, paths ...string) blueprint.Variable {
	return p.VariableFunc(name, func(ctx PackageVarContext) string {
	var ret []string
	for _, path := range paths {
	p, err := safePathForSource(ctx, path)
	if err != nil {
	ctx.Errorf("%s", err.Error())
	}
	ret = append(ret, p.String())
	}
	return strings.Join(ret, separator)
	})
	}

	// SourcePathVariableWithEnvOverride returns a Variable whose value is the source directory
	// appended with the supplied path, or the value of the given environment variable if it is set.
	// The environment variable is not required to point to a path inside the source tree.
	// It may only be called during a Go package's initialization - either from the init() function or
	// as part of a package-scoped variable's initialization.
	func (p PackageContext) SourcePathVariableWithEnvOverride(name, path, env string) blueprint.Variable {
	return p.VariableFunc(name, func(ctx PackageVarContext) string {
	p, err := safePathForSource(ctx, path)
	if err != nil {
	ctx.Errorf("%s", err.Error())
	}
	return ctx.Config().GetenvWithDefault(env, p.String())
	})
	}

	// HostBinToolVariable returns a Variable whose value is the path to a host tool
	// in the bin directory for host targets. It may only be called during a Go
	// package's initialization - either from the init() function or as part of a
	// package-scoped variable's initialization.
	func (p PackageContext) HostBinToolVariable(name, path string) blueprint.Variable {
	return p.VariableFunc(name, func(ctx PackageVarContext) string {
	return ctx.Config().HostToolPath(ctx, path).String()
	})
	}

	// HostJNIToolVariable returns a Variable whose value is the path to a host tool
	// in the lib directory for host targets. It may only be called during a Go
	// package's initialization - either from the init() function or as part of a
	// package-scoped variable's initialization.
	func (p PackageContext) HostJNIToolVariable(name, path string) blueprint.Variable {
	return p.VariableFunc(name, func(ctx PackageVarContext) string {
	return ctx.Config().HostJNIToolPath(ctx, path).String()
	})
	}

	// HostJavaToolVariable returns a Variable whose value is the path to a host
	// tool in the frameworks directory for host targets. It may only be called
	// during a Go package's initialization - either from the init() function or as
	// part of a package-scoped variable's initialization.
	func (p PackageContext) HostJavaToolVariable(name, path string) blueprint.Variable {
	return p.VariableFunc(name, func(ctx PackageVarContext) string {
	return ctx.Config().HostJavaToolPath(ctx, path).String()
	})
	}

	// IntermediatesPathVariable returns a Variable whose value is the intermediate
	// directory appended with the supplied path. It may only be called during a Go
	// package's initialization - either from the init() function or as part of a
	// package-scoped variable's initialization.
	func (p PackageContext) IntermediatesPathVariable(name, path string) blueprint.Variable {
	return p.VariableFunc(name, func(ctx PackageVarContext) string {
	return PathForIntermediates(ctx, path).String()
	})
	}

	// PrefixedExistentPathsForSourcesVariable returns a Variable whose value is the
	// list of present source paths prefixed with the supplied prefix. It may only
	// be called during a Go package's initialization - either from the init()
	// function or as part of a package-scoped variable's initialization.
	func (p PackageContext) PrefixedExistentPathsForSourcesVariable(
	name, prefix string, paths []string) blueprint.Variable {

	return p.VariableFunc(name, func(ctx PackageVarContext) string {
	paths := ExistentPathsForSources(ctx, paths)
	return JoinWithPrefix(paths.Strings(), prefix)
	})
	}

	// AndroidStaticRule is an alias for StaticRule.
	func (p PackageContext) AndroidStaticRule(name string, params blueprint.RuleParams,
	argNames ...string) blueprint.Rule {
	return p.StaticRule(name, params, argNames...)
	}

	// StaticRule wraps blueprint.StaticRule and provides a default Pool if none is specified.
	func (p PackageContext) StaticRule(name string, params blueprint.RuleParams,
	argNames ...string) blueprint.Rule {
	return p.RuleFunc(name, func(PackageRuleContext) blueprint.RuleParams {
	return params
	}, argNames...)
	}

	// RemoteRuleSupports configures rules with whether they have Goma and/or RBE support.
	type RemoteRuleSupports struct {
	Goma bool
	RBE bool
	}

	// AndroidRemoteStaticRule wraps blueprint.StaticRule but uses goma or RBE's parallelism if goma or RBE are enabled
	// and the appropriate SUPPORTS_* flag is set.
	func (p PackageContext) AndroidRemoteStaticRule(name string, supports RemoteRuleSupports, params blueprint.RuleParams,
	argNames ...string) blueprint.Rule {

	return p.PackageContext.RuleFunc(name, func(config interface{}) (blueprint.RuleParams, error) {
	ctx := &configErrorWrapper{p, config.(Config), nil}
	if ctx.Config().UseGoma() && !supports.Goma {
	// When USE_GOMA=true is set and the rule is not supported by goma, restrict jobs to the
	// local parallelism value
	params.Pool = localPool
	}

	if ctx.Config().UseRBE() && !supports.RBE {
	// When USE_RBE=true is set and the rule is not supported by RBE, restrict jobs to the
	// local parallelism value
	params.Pool = localPool
	}

	return params, nil
	}, argNames...)
	}

	// RemoteStaticRules returns a pair of rules based on the given RuleParams, where the first rule is a
	// locally executable rule and the second rule is a remotely executable rule. commonArgs are args
	// used for both the local and remotely executable rules. reArgs are used only for remote
	// execution.
	func (p PackageContext) RemoteStaticRules(name string, ruleParams blueprint.RuleParams, reParams *remoteexec.REParams, commonArgs []string, reArgs []string) (blueprint.Rule, blueprint.Rule) {
	ruleParamsRE := ruleParams
	ruleParams.Command = strings.ReplaceAll(ruleParams.Command, "$reTemplate", "")
	ruleParamsRE.Command = strings.ReplaceAll(ruleParamsRE.Command, "$reTemplate", reParams.Template())

	return p.AndroidStaticRule(name, ruleParams, commonArgs...),
	p.AndroidRemoteStaticRule(name+"RE", RemoteRuleSupports{RBE: true}, ruleParamsRE, append(commonArgs, reArgs...)...)
	}

	// MultiCommandStaticRules returns a pair of rules based on the given RuleParams, where the first
	// rule is a locally executable rule and the second rule is a remotely executable rule. This
	// function supports multiple remote execution wrappers placed in the template when commands are
	// chained together with &&. commonArgs are args used for both the local and remotely executable
	// rules. reArgs are args used only for remote execution.
	func (p PackageContext) MultiCommandRemoteStaticRules(name string, ruleParams blueprint.RuleParams, reParams map[string]*remoteexec.REParams, commonArgs []string, reArgs []string) (blueprint.Rule, blueprint.Rule) {
	ruleParamsRE := ruleParams
	for k, v := range reParams {
	ruleParams.Command = strings.ReplaceAll(ruleParams.Command, k, "")
	ruleParamsRE.Command = strings.ReplaceAll(ruleParamsRE.Command, k, v.Template())
	}

	return p.AndroidStaticRule(name, ruleParams, commonArgs...),
	p.AndroidRemoteStaticRule(name+"RE", RemoteRuleSupports{RBE: true}, ruleParamsRE, append(commonArgs, reArgs...)...)
	}

	// StaticVariableWithEnvOverride creates a static variable that evaluates to the value of the given
	// environment variable if set, otherwise the given default.
	func (p PackageContext) StaticVariableWithEnvOverride(name, envVar, defaultVal string) blueprint.Variable {
	return p.VariableFunc(name, func(ctx PackageVarContext) string {
	return ctx.Config().GetenvWithDefault(envVar, defaultVal)
	})
	}