/
dvar.go
236 lines (192 loc) · 6.29 KB
/
dvar.go
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// Ultimate Provisioner: UP cmd
// Copyright (c) 2019 Stephen Cheng and contributors
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
package impl
import (
"bufio"
"github.com/mohae/deepcopy"
"github.com/upcmd/up/model/core"
u "github.com/upcmd/up/utils"
"gopkg.in/yaml.v2"
"io/ioutil"
"os"
"path"
"strings"
)
type Dvars []Dvar
type Dvar struct {
Name string
Value string
Desc string
Expand int
Flags []string //supported: vvvv, to_object,envvar,
Rendered string
Secure *u.SecureSetting
Ref string
RefDir string
DataKey string
DataPath string
DataTemplate string
}
func (dvars *Dvars) ValidateAndLoading(contextVars *core.Cache) {
var identified bool
for idx, dvar := range *dvars {
if strings.Contains(dvar.Name, "-") {
identified = true
u.InvalidAndExit("validating dvar name", "dvar name can not contain '-', please use '_' instead")
}
if u.CharIsNum(dvar.Name[0:1]) != -1 {
identified = true
u.InvalidAndExit("validating dvar name", "dvar name can not start with number")
}
if dvar.Ref != "" && dvar.Value != "" {
u.InvalidAndExit("validating dvar ref and value", "ref and value can not both exist at the same time")
}
refdir := ConfigRuntime().RefDir
if dvar.Ref != "" {
if dvar.RefDir != "" {
rawdir := dvar.RefDir
refdir = Render(rawdir, contextVars)
}
rawref := dvar.Ref
ref := Render(rawref, contextVars)
data, err := ioutil.ReadFile(path.Join(refdir, ref))
u.LogErrorAndExit("load dvar value from ref file", err, "please fix file loading problem")
(*dvars)[idx].Value = string(data)
}
}
if identified {
u.LogError("dvar validate", "the dvar name identified above should be fixed before continue")
os.Exit(-1)
}
}
//given a dvars with the vars context, it expands with rendered result
func (dvars *Dvars) Expand(mark string, contextVars *core.Cache) *core.Cache {
dvars.ValidateAndLoading(contextVars)
var expandedVars *core.Cache = core.NewCache()
if *contextVars == nil {
contextVars = core.NewCache()
}
var tmpVars core.Cache = deepcopy.Copy(*contextVars).(core.Cache)
var tmpDvars Dvars
tmpDvars = deepcopy.Copy(*dvars).(Dvars)
var datasource interface{}
for idx, dvar := range tmpDvars {
dvarRaw := tmpDvars[idx].Value
if dvar.Expand == 0 {
tmpDvars[idx].Expand = 1
}
for i := 0; i < tmpDvars[idx].Expand; i++ {
tval := tmpDvars[idx].Value
tmpDvars[idx].Value = Render(tval, tmpVars)
}
var rval string
if dvar.DataKey != "" && dvar.DataPath != "" && dvar.DataTemplate != "" {
u.InvalidAndExit("validating datasource", "datakey, datapath and datatemplate can not coexist at the same time")
}
//the rendering using the datakey is the post rendering process
if dvar.DataKey != "" {
datakey := Render(dvar.DataKey, tmpVars)
datasource = tmpVars.Get(datakey)
rval = Render(dvarRaw, datasource)
} else {
rval = tmpDvars[idx].Value
}
if dvar.DataPath != "" {
datapath := Render(dvar.DataPath, tmpVars)
datasource = core.GetSubObjectFromCache(&tmpVars, datapath, false, ConfigRuntime().Verbose)
rval = Render(dvarRaw, datasource)
} else {
rval = tmpDvars[idx].Value
}
if dvar.DataTemplate != "" {
datatemplate := Render(dvar.DataTemplate, tmpVars)
datasource = core.YamlToObj(datatemplate)
rval = Render(dvarRaw, datasource)
} else {
rval = tmpDvars[idx].Value
}
tmpVars.Put(dvar.Name, rval)
(*dvars)[idx].Rendered = rval
if dvar.Name != "void" {
expandedVars.Put(dvar.Name, rval)
}
func() {
dvar := (*dvars)[idx]
mergeTarget := &tmpVars
vlevels := []string{"v", "vv", "vvv", "vvvv", "vvvvv", "vvvvv"}
if dvar.Flags != nil && len(dvar.Flags) != 0 {
for _, vlevel := range vlevels {
if u.Contains(dvar.Flags, vlevel) {
u.PpmsgHintHighPermitted("v", "dvar> "+dvar.Name, dvar.Rendered)
}
}
if u.Contains(dvar.Flags, "to_object") {
rawyml := dvar.Rendered
obj := new(interface{})
err := yaml.Unmarshal([]byte(rawyml), obj)
u.LogErrorAndExit("dvar conversion to object:", err, "please validate the ymal content")
dvarObjName := u.Spf("%s_%s", dvar.Name, "object")
if dvar.Name != "void" {
(*mergeTarget).Put(dvarObjName, *obj)
(*expandedVars).Put(dvarObjName, *obj)
}
if TaskerRuntime().Tasker.TaskStack.GetLen() > 0 {
if u.Contains(dvar.Flags, "reg") {
if dvar.Name != "void" {
TaskRuntime().ExecbaseVars.Put(dvarObjName, *obj)
} else {
u.LogWarn("?reg a void", "you can't register a object with void name, use a proper name instead or split to multiple steps")
}
}
}
for _, vlevel := range vlevels {
if u.Contains(dvar.Flags, vlevel) {
u.PpmsgHintHighPermitted("v", "dvar> "+dvarObjName, *obj)
}
}
}
if u.Contains(dvar.Flags, "envvar") {
envvarName := u.Spf("%s_%s", "envvar", dvar.Name)
(*mergeTarget).Put(envvarName, dvar.Rendered)
(*expandedVars).Put(envvarName, dvar.Rendered)
}
if TaskerRuntime().Tasker.TaskStack.GetLen() > 0 {
if u.Contains(dvar.Flags, "reg") {
if dvar.Name != "void" {
TaskRuntime().ExecbaseVars.Put(dvar.Name, dvar.Rendered)
}
}
}
if u.Contains(dvar.Flags, "secure") {
DecryptAndRegister(ConfigRuntime().Secure, &dvar, mergeTarget, expandedVars)
}
if u.Contains(dvar.Flags, "prompt") {
u.Ppromptvvvvv(dvar.Name, func() string {
if dvar.Desc != "" {
return dvar.Desc
} else {
return u.Spf("This will be saved as %s's value", dvar.Name)
}
}())
reader := bufio.NewReader(os.Stdin)
dvarInputValue, _ := reader.ReadString('\n')
saneValue := u.RemoveCr(dvarInputValue)
(*mergeTarget).Put(dvar.Name, saneValue)
(*expandedVars).Put(dvar.Name, saneValue)
dvar.Rendered = saneValue
}
if u.Contains(dvar.Flags, "taskscope") {
TaskRuntime().TaskVars.Put(dvar.Name, dvar.Rendered)
}
}
if dvar.Secure != nil {
DecryptAndRegister(ConfigRuntime().Secure, &dvar, mergeTarget, expandedVars)
}
}()
}
u.Pfvvvvv("[%s] dvar expanded result:\n%s\n", mark, u.Sppmsg(*expandedVars))
return expandedVars
}