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common.go
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common.go
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package cmd
import (
"net/http"
"os"
"github.com/blang/semver"
"github.com/fatih/color"
"github.com/hbagdi/deck/diff"
"github.com/hbagdi/deck/dump"
"github.com/hbagdi/deck/file"
"github.com/hbagdi/deck/print"
"github.com/hbagdi/deck/solver"
"github.com/hbagdi/deck/state"
"github.com/hbagdi/deck/utils"
"github.com/hbagdi/go-kong/kong"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
const (
exitCodeDiffDetection = 2
)
var (
stopChannel chan struct{}
dumpConfig dump.Config
)
// SetStopCh sets the stop channel for long running commands.
// This is useful for cases when a process needs to be cancelled gracefully
// before it can complete to finish. Example: SIGINT
func SetStopCh(stopCh chan struct{}) {
stopChannel = stopCh
}
// workspaceExists checks if workspace exists in Kong.
func workspaceExists(config utils.KongClientConfig) (bool, error) {
workspace := config.Workspace
if workspace == "" {
// default workspace always exists
return true, nil
}
if config.SkipWorkspaceCrud {
// if RBAC user, skip check
return true, nil
}
// remove workspace to be able to call top-level /workspaces endpoint
config.Workspace = ""
rootClient, err := utils.GetKongClient(config)
if err != nil {
return false, err
}
_, err = rootClient.Workspaces.Get(nil, &workspace)
if err != nil {
if kong.IsNotFoundErr(err) {
return false, nil
}
return false, errors.Wrap(err, "error when getting workspace")
}
return true, nil
}
func syncMain(filenames []string, dry bool, parallelism, delay int, workspace string) error {
// read target file
targetContent, err := file.GetContentFromFiles(filenames)
if err != nil {
return err
}
rootClient, err := utils.GetKongClient(config)
if err != nil {
return err
}
// prepare to read the current state from Kong
if workspace != targetContent.Workspace && workspace != "" {
print.DeletePrintf("Warning: Workspace '%v' specified via --workspace flag is "+
"different from workspace '%v' found in state file(s).\n", workspace, targetContent.Workspace)
config.Workspace = workspace
} else {
config.Workspace = targetContent.Workspace
}
// load Kong version after workspace
kongVersion, err := kongVersion(config)
if err != nil {
return errors.Wrap(err, "reading Kong version")
}
workspaceExists, err := workspaceExists(config)
if err != nil {
return err
}
client, err := utils.GetKongClient(config)
if err != nil {
return err
}
if targetContent.Info != nil {
dumpConfig.SelectorTags = targetContent.Info.SelectorTags
}
// read the current state
var currentState *state.KongState
if workspaceExists {
rawState, err := dump.Get(client, dumpConfig)
if err != nil {
return err
}
currentState, err = state.Get(rawState)
if err != nil {
return err
}
} else {
print.CreatePrintln("creating workspace", targetContent.Workspace)
// inject empty state
currentState, err = state.NewKongState()
if err != nil {
return err
}
if !dry {
_, err = rootClient.Workspaces.Create(nil, &kong.Workspace{Name: &targetContent.Workspace})
if err != nil {
return err
}
}
}
// read the target state
rawState, err := file.Get(targetContent, file.RenderConfig{
CurrentState: currentState,
KongVersion: kongVersion,
})
if err != nil {
return err
}
targetState, err := state.Get(rawState)
if err != nil {
return err
}
s, _ := diff.NewSyncer(currentState, targetState)
s.StageDelaySec = delay
stats, errs := solver.Solve(stopChannel, s, client, parallelism, dry)
if errs != nil {
return utils.ErrArray{Errors: errs}
}
printFn := color.New(color.FgGreen, color.Bold).PrintfFunc()
printFn("Summary:\n")
printFn(" Created: %v\n", stats.CreateOps)
printFn(" Updated: %v\n", stats.UpdateOps)
printFn(" Deleted: %v\n", stats.DeleteOps)
if diffCmdNonZeroExitCode &&
stats.CreateOps+stats.UpdateOps+stats.DeleteOps != 0 {
os.Exit(exitCodeDiffDetection)
}
return nil
}
func kongVersion(config utils.KongClientConfig) (semver.Version, error) {
var version string
workspace := config.Workspace
// remove workspace to be able to call top-level / endpoint
config.Workspace = ""
client, err := utils.GetKongClient(config)
if err != nil {
return semver.Version{}, err
}
root, err := client.Root(nil)
if err != nil {
if workspace == "" {
return semver.Version{}, err
}
// try with workspace path
req, err := http.NewRequest("GET",
utils.CleanAddress(config.Address)+"/"+workspace+"/kong",
nil)
if err != nil {
return semver.Version{}, err
}
var resp map[string]interface{}
_, err = client.Do(nil, req, &resp)
if err != nil {
return semver.Version{}, err
}
version = resp["version"].(string)
} else {
version = root["version"].(string)
}
v, err := utils.CleanKongVersion(version)
if err != nil {
return semver.Version{}, err
}
return semver.ParseTolerant(v)
}
func validateNoArgs(cmd *cobra.Command, args []string) error {
if len(args) > 0 {
return errors.New("positional arguments are not valid for this command, please use flags instead\n" +
"Run 'deck --help' for usage.")
}
return nil
}