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dagger/plancontext/context.go
Andrea Luzzardi a61e8dcb62 prepare the transition to #Plan.context
This change helps the transition between `dagger input` and `#Plan.context`.

In summary, the codebase now relies on a *context* for execution with mapping to *IDs*.
In the future, *context* will come from a `#Plan.context`.
In the meantime, a bridge converts `dagger input` to a plan context. This allows both *old* and *new* style configurations to co-exist with the same underlying engine.

- Implement `plancontext`. Context holds the execution context for a plan. Currently this includes the platform, local directories, secrets and services (e.g. unix/npipe).
- Contextual data can be registered at any point. In the future, this will be done by `#Plan.context`
- Migrated the `dagger input` codebase to register inputs in a `plancontext`
- Migrated low-level types/operations to the *Context ID* pattern.
  - `dagger.#Stream` now only includes an `id` (instead of `unix` path)
  - `dagger.#Secret` still includes only an ID, but now it's based off `plancontext`
  - `op.#Local` now only includes an `id` (instead of `path`, `include`, `exclude`.

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>
2021-11-19 11:29:38 -08:00

49 lines
926 B
Go

package plancontext
import (
"crypto/sha256"
"encoding/json"
"fmt"
)
type ContextKey string
// Context holds the execution context for a plan.
//
// Usage:
// ctx := plancontext.New()
// id := ctx.Secrets.Register("mysecret")
// secret := ctx.Secrets.Get(id)
type Context struct {
Platform *platformContext
Directories *directoryContext
Secrets *secretContext
Services *serviceContext
}
func New() *Context {
return &Context{
Platform: &platformContext{
platform: defaultPlatform,
},
Directories: &directoryContext{
store: make(map[ContextKey]*Directory),
},
Secrets: &secretContext{
store: make(map[ContextKey]*Secret),
},
Services: &serviceContext{
store: make(map[ContextKey]*Service),
},
}
}
func hashID(v interface{}) ContextKey {
data, err := json.Marshal(v)
if err != nil {
panic(err)
}
hash := sha256.Sum256(data)
return ContextKey(fmt.Sprintf("%x", hash))
}