f19619ef9f
This commit adds a new environment package that manages all calls to the underlying operating system.
86 lines
2.5 KiB
Go
86 lines
2.5 KiB
Go
package cmd
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import (
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wisski_distillery "github.com/FAU-CDI/wisski-distillery"
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"github.com/FAU-CDI/wisski-distillery/internal/component"
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"github.com/FAU-CDI/wisski-distillery/internal/core"
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"github.com/FAU-CDI/wisski-distillery/pkg/fsx"
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"github.com/FAU-CDI/wisski-distillery/pkg/logging"
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"github.com/tkw1536/goprogram/exit"
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)
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// Reserve is the 'reserve' command
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var Reserve wisski_distillery.Command = reserve{}
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type reserve struct {
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Positionals struct {
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Slug string `positional-arg-name:"slug" required:"1-1" description:"name of WissKI Instance to reserve"`
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} `positional-args:"true"`
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}
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func (reserve) Description() wisski_distillery.Description {
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return wisski_distillery.Description{
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Requirements: core.Requirements{
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NeedsDistillery: true,
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},
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Command: "reserve",
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Description: "Reserves a new WissKI Instance",
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}
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}
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// TODO: AfterParse to check instance!
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var errReserveAlreadyExists = exit.Error{
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Message: "Instance %q already exists",
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ExitCode: exit.ExitGeneric,
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}
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var errReserveGeneric = exit.Error{
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Message: "Unable to provision instance %s: %s",
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ExitCode: exit.ExitGeneric,
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}
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func (r reserve) Run(context wisski_distillery.Context) error {
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dis := context.Environment
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slug := r.Positionals.Slug
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// check that it doesn't already exist
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logging.LogMessage(context.IOStream, "Reserving new WissKI instance %s", slug)
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if exists, err := dis.Instances().Has(slug); err != nil || exists {
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return errProvisionAlreadyExists.WithMessageF(slug)
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}
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// make it in-memory
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instance, err := dis.Instances().Create(slug)
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if err != nil {
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return errProvisionGeneric.WithMessageF(slug, err)
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}
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// check that the base directory does not exist
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logging.LogMessage(context.IOStream, "Checking that base directory %s does not exist", instance.FilesystemBase)
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if fsx.IsDirectory(dis.Environment, instance.FilesystemBase) {
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return errProvisionAlreadyExists.WithMessageF(slug)
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}
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// setup docker stack
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s := instance.Reserve()
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{
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if err := logging.LogOperation(func() error {
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return s.Install(dis.Core.Environment, context.IOStream, component.InstallationContext{})
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}, context.IOStream, "Installing docker stack"); err != nil {
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return err
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}
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if err := logging.LogOperation(func() error {
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return s.Update(context.IOStream, true)
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}, context.IOStream, "Updating docker stack"); err != nil {
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return err
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}
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}
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// and we're done!
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logging.LogMessage(context.IOStream, "Instance has been reserved")
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context.Printf("URL: %s\n", instance.URL().String())
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return nil
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}
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