Remove cache

go.mod

@@ -3,5 +3,6 @@ module github.com/terraform-providers/terraform-provider-ignition
 require (
 	github.com/coreos/ignition v0.0.0-20170904171445-ea573e121f72
 	github.com/hashicorp/terraform v0.12.0
+	github.com/pkg/errors v0.8.1
 	github.com/vincent-petithory/dataurl v0.0.0-20160330182126-9a301d65acbb // indirect
 )

go.sum

@@ -289,6 +289,8 @@ github.com/packer-community/winrmcp v0.0.0-20180102160824-81144009af58/go.mod h1
 github.com/pascaldekloe/goe v0.0.0-20180627143212-57f6aae5913c/go.mod h1:lzWF7FIEvWOWxwDKqyGYQf6ZUaNfKdP144TG7ZOy1lc=
 github.com/pkg/errors v0.0.0-20170505043639-c605e284fe17 h1:chPfVn+gpAM5CTpTyVU9j8J+xgRGwmoDlNDLjKnJiYo=
 github.com/pkg/errors v0.0.0-20170505043639-c605e284fe17/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
+github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/posener/complete v1.1.1/go.mod h1:em0nMJCgc9GFtwrmVmEMR/ZL6WyhyjMBndrE9hABlRI=

ignition/provider.go

@@ -6,31 +6,12 @@ import (
 	"encoding/json"
 	"fmt"
 	"log"
-	"sync"
 
-	"github.com/coreos/ignition/config/v2_1/types"
 	"github.com/coreos/ignition/config/validate/report"
 	"github.com/hashicorp/terraform/helper/schema"
 	"github.com/hashicorp/terraform/terraform"
 )
 
-// globalCache keeps the instances of the internal types of ignition generated
-// by the different data resources with the goal to be reused by the
-// ignition_config data resource. The key of the maps are a hash of the types
-// calculated on the type serialized to JSON.
-var globalCache = &cache{
-	disks:         make(map[string]*types.Disk, 0),
-	arrays:        make(map[string]*types.Raid, 0),
-	filesystems:   make(map[string]*types.Filesystem, 0),
-	files:         make(map[string]*types.File, 0),
-	directories:   make(map[string]*types.Directory, 0),
-	links:         make(map[string]*types.Link, 0),
-	systemdUnits:  make(map[string]*types.Unit, 0),
-	networkdUnits: make(map[string]*types.Networkdunit, 0),
-	users:         make(map[string]*types.PasswdUser, 0),
-	groups:        make(map[string]*types.PasswdGroup, 0),
-}
-
 func Provider() terraform.ResourceProvider {
 	return &schema.Provider{
 		DataSourcesMap: map[string]*schema.Resource{
@@ -49,121 +30,6 @@ func Provider() terraform.ResourceProvider {
 	}
 }
 
-type cache struct {
-	disks         map[string]*types.Disk
-	arrays        map[string]*types.Raid
-	filesystems   map[string]*types.Filesystem
-	files         map[string]*types.File
-	directories   map[string]*types.Directory
-	links         map[string]*types.Link
-	systemdUnits  map[string]*types.Unit
-	networkdUnits map[string]*types.Networkdunit
-	users         map[string]*types.PasswdUser
-	groups        map[string]*types.PasswdGroup
-
-	sync.Mutex
-}
-
-func (c *cache) addDisk(g *types.Disk) string {
-	c.Lock()
-	defer c.Unlock()
-
-	id := id(g)
-	c.disks[id] = g
-
-	return id
-}
-
-func (c *cache) addRaid(r *types.Raid) string {
-	c.Lock()
-	defer c.Unlock()
-
-	id := id(r)
-	c.arrays[id] = r
-
-	return id
-}
-
-func (c *cache) addFilesystem(f *types.Filesystem) string {
-	c.Lock()
-	defer c.Unlock()
-
-	id := id(f)
-	c.filesystems[id] = f
-
-	return id
-}
-
-func (c *cache) addFile(f *types.File) string {
-	c.Lock()
-	defer c.Unlock()
-
-	id := id(f)
-	c.files[id] = f
-
-	return id
-}
-
-func (c *cache) addDirectory(d *types.Directory) string {
-	c.Lock()
-	defer c.Unlock()
-
-	id := id(d)
-	c.directories[id] = d
-
-	return id
-}
-
-func (c *cache) addLink(l *types.Link) string {
-	c.Lock()
-	defer c.Unlock()
-
-	id := id(l)
-	c.links[id] = l
-
-	return id
-}
-
-func (c *cache) addSystemdUnit(u *types.Unit) string {
-	c.Lock()
-	defer c.Unlock()
-
-	id := id(u)
-	c.systemdUnits[id] = u
-
-	return id
-}
-
-func (c *cache) addNetworkdUnit(u *types.Networkdunit) string {
-	c.Lock()
-	defer c.Unlock()
-
-	id := id(u)
-	c.networkdUnits[id] = u
-
-	return id
-}
-
-func (c *cache) addUser(u *types.PasswdUser) string {
-	c.Lock()
-	defer c.Unlock()
-
-	id := id(u)
-	c.users[id] = u
-
-	return id
-}
-
-func (c *cache) addGroup(g *types.PasswdGroup) string {
-	c.Lock()
-	defer c.Unlock()
-
-	id := id(g)
-	c.groups[id] = g
-
-	return id
-}
-
 func id(input interface{}) string {
 	b, _ := json.Marshal(input)
 	return hash(string(b))
@@ -174,19 +40,6 @@ func hash(s string) string {
 	return hex.EncodeToString(sha[:])
 }
 
-func castSliceInterface(i []interface{}) []string {
-	var o []string
-	for _, value := range i {
-		if value == nil {
-			continue
-		}
-
-		o = append(o, value.(string))
-	}
-
-	return o
-}
-
 func getInt(d *schema.ResourceData, key string) *int {
 	var i *int
 	if value, ok := d.GetOk(key); ok {