asteris-llc/converge

// Copyright © 2016 Asteris, LLC
//
// 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 load

import (
    "fmt"

    "github.com/asteris-llc/converge/graph"
    "github.com/asteris-llc/converge/graph/node"
    "github.com/asteris-llc/converge/helpers/logging"
    "github.com/asteris-llc/converge/load/registry"
    "github.com/asteris-llc/converge/parse"
    "github.com/asteris-llc/converge/resource"
    "github.com/hashicorp/hcl"

    // import empty to register types for SetResources
    _ "github.com/asteris-llc/converge/resource/docker/container"
    _ "github.com/asteris-llc/converge/resource/docker/image"
    _ "github.com/asteris-llc/converge/resource/docker/network"
    _ "github.com/asteris-llc/converge/resource/docker/volume"
    _ "github.com/asteris-llc/converge/resource/file/content"
    _ "github.com/asteris-llc/converge/resource/file/directory"
    _ "github.com/asteris-llc/converge/resource/file/fetch"
    _ "github.com/asteris-llc/converge/resource/file/mode"
    _ "github.com/asteris-llc/converge/resource/file/owner"
    _ "github.com/asteris-llc/converge/resource/group"
    _ "github.com/asteris-llc/converge/resource/lvm/fs"
    _ "github.com/asteris-llc/converge/resource/lvm/lv"
    _ "github.com/asteris-llc/converge/resource/lvm/vg"
    _ "github.com/asteris-llc/converge/resource/module"
    _ "github.com/asteris-llc/converge/resource/package/apt"
    _ "github.com/asteris-llc/converge/resource/package/rpm"
    _ "github.com/asteris-llc/converge/resource/param"
    _ "github.com/asteris-llc/converge/resource/shell"
    _ "github.com/asteris-llc/converge/resource/shell/query"
    _ "github.com/asteris-llc/converge/resource/systemd/unit"
    _ "github.com/asteris-llc/converge/resource/unarchive"
    _ "github.com/asteris-llc/converge/resource/user"
    _ "github.com/asteris-llc/converge/resource/wait"
    _ "github.com/asteris-llc/converge/resource/wait/port"
    "golang.org/x/net/context"
)

// SetResources loads the resources for each graph node
func SetResources(ctx context.Context, g *graph.Graph) (*graph.Graph, error) {
    logger := logging.GetLogger(ctx).WithField("function", "SetResources")
    logger.Debug("loading resources")

    return g.Transform(ctx, func(meta *node.Node, out *graph.Graph) error {
        if graph.IsRoot(meta.ID) {
            return nil
        }

        raw, ok := meta.Value().(*parse.Node)
        if !ok {
            return fmt.Errorf("SetResources can only be used on Graphs of *parse.Node. I got %T", meta.Value())
        }

        dest, ok := registry.NewByName(raw.Kind())
        if !ok {
            return fmt.Errorf("%q is not a valid resource type in %q", raw.Kind(), raw)
        }

        res, ok := dest.(resource.Resource)
        if !ok {
            return fmt.Errorf("%q is not a valid resource, got %T", raw.Kind(), dest)
        }

        preparer := resource.NewPreparer(res)

        err := hcl.DecodeObject(&preparer.Source, raw.ObjectItem.Val)
        if err != nil {
            return err
        }

        out.Add(meta.WithValue(preparer))
        return nil
    })
}