Golang Tree.Children方法代碼示例

// checkRequiredVersion verifies that any version requirements specified by
// the configuration are met.
//
// This checks the root module as well as any additional version requirements
// from child modules.
//
// This is tested in context_test.go.
func checkRequiredVersion(m *module.Tree) error {
	// Check any children
	for _, c := range m.Children() {
		if err := checkRequiredVersion(c); err != nil {
			return err
		}
	}

	var tf *config.Terraform
	if c := m.Config(); c != nil {
		tf = c.Terraform
	}

	// If there is no Terraform config or the required version isn't set,
	// we move on.
	if tf == nil || tf.RequiredVersion == "" {
		return nil
	}

	// Path for errors
	module := "root"
	if path := normalizeModulePath(m.Path()); len(path) > 1 {
		module = modulePrefixStr(path)
	}

	// Check this version requirement of this module
	cs, err := version.NewConstraint(tf.RequiredVersion)
	if err != nil {
		return fmt.Errorf(
			"%s: terraform.required_version %q syntax error: %s",
			module,
			tf.RequiredVersion, err)
	}

	if !cs.Check(SemVersion) {
		return fmt.Errorf(
			"The currently running version of Terraform doesn't meet the\n"+
				"version requirements explicitly specified by the configuration.\n"+
				"Please use the required version or update the configuration.\n"+
				"Note that version requirements are usually set for a reason, so\n"+
				"we recommend verifying with whoever set the version requirements\n"+
				"prior to making any manual changes.\n\n"+
				"  Module: %s\n"+
				"  Required version: %s\n"+
				"  Current version: %s",
			module,
			tf.RequiredVersion,
			SemVersion)
	}

	return nil
}

func (t *ConfigTransformer) transform(g *Graph, m *module.Tree) error {
	// If no config, do nothing
	if m == nil {
		return nil
	}

	// Add our resources
	if err := t.transformSingle(g, m); err != nil {
		return err
	}

	// Transform all the children.
	for _, c := range m.Children() {
		if err := t.transform(g, c); err != nil {
			return err
		}
	}

	return nil
}

func (t *FlatConfigTransformer) transform(g *Graph, m *module.Tree) error {
	// If no module, no problem
	if m == nil {
		return nil
	}

	// Transform all the children.
	for _, c := range m.Children() {
		if err := t.transform(g, c); err != nil {
			return err
		}
	}

	// Get the configuration for this module
	config := m.Config()

	// Write all the resources out
	for _, r := range config.Resources {
		// Grab the address for this resource
		addr, err := parseResourceAddressConfig(r)
		if err != nil {
			return err
		}
		addr.Path = m.Path()

		// Build the abstract resource. We have the config already so
		// we'll just pre-populate that.
		abstract := &NodeAbstractResource{
			Addr:   addr,
			Config: r,
		}
		var node dag.Vertex = abstract
		if f := t.Concrete; f != nil {
			node = f(abstract)
		}

		g.Add(node)
	}

	return nil
}

func (t *OutputTransformer) transform(g *Graph, m *module.Tree) error {
	// If no config, no outputs
	if m == nil {
		return nil
	}

	// Transform all the children. We must do this first because
	// we can reference module outputs and they must show up in the
	// reference map.
	for _, c := range m.Children() {
		if err := t.transform(g, c); err != nil {
			return err
		}
	}

	// If we have no outputs, we're done!
	os := m.Config().Outputs
	if len(os) == 0 {
		return nil
	}

	// Add all outputs here
	for _, o := range os {
		// Build the node.
		//
		// NOTE: For now this is just an "applyable" output. As we build
		// new graph builders for the other operations I suspect we'll
		// find a way to parameterize this, require new transforms, etc.
		node := &NodeApplyableOutput{
			PathValue: normalizeModulePath(m.Path()),
			Config:    o,
		}

		// Add it!
		g.Add(node)
	}

	return nil
}

func (t *OrphanOutputTransformer) transform(g *Graph, m *module.Tree) error {
	// Get our configuration, and recurse into children
	var c *config.Config
	if m != nil {
		c = m.Config()
		for _, child := range m.Children() {
			if err := t.transform(g, child); err != nil {
				return err
			}
		}
	}

	// Get the state. If there is no state, then we have no orphans!
	path := normalizeModulePath(m.Path())
	state := t.State.ModuleByPath(path)
	if state == nil {
		return nil
	}

	// Make a map of the valid outputs
	valid := make(map[string]struct{})
	for _, o := range c.Outputs {
		valid[o.Name] = struct{}{}
	}

	// Go through the outputs and find the ones that aren't in our config.
	for n, _ := range state.Outputs {
		// If it is in the valid map, then ignore
		if _, ok := valid[n]; ok {
			continue
		}

		// Orphan!
		g.Add(&NodeOutputOrphan{OutputName: n, PathValue: path})
	}

	return nil
}

func (t *ModuleVariableTransformer) transform(g *Graph, parent, m *module.Tree) error {
	// If no config, no variables
	if m == nil {
		return nil
	}

	// Transform all the children. This must be done BEFORE the transform
	// above since child module variables can reference parent module variables.
	for _, c := range m.Children() {
		if err := t.transform(g, m, c); err != nil {
			return err
		}
	}

	// If we have a parent, we can determine if a module variable is being
	// used, so we transform this.
	if parent != nil {
		if err := t.transformSingle(g, parent, m); err != nil {
			return err
		}
	}

	return nil
}