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lang: Initial implementation of the mgmt language

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This is an initial implementation of the mgmt language. It is a
declarative (immutable) functional, reactive, domain specific
programming language. It is intended to be a language that is:

* safe
* powerful
* easy to reason about

With these properties, we hope this language, and the mgmt engine will
allow you to model the real-time systems that you'd like to automate.

This also includes a number of other associated changes. Sorry for the
large size of this patch.
This commit is contained in:
James Shubin
2018-01-20 08:09:29 -05:00
parent 1c8c0b2915
commit b19583e7d3
237 changed files with 25256 additions and 743 deletions
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14
etcd/strmap.go
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@@ -31,8 +31,8 @@ import (
// FIXME: It should close the channel when it's done, and spit out errors when
// something goes wrong.
func WatchStrMap(obj *EmbdEtcd, key string) chan error {
// new key structure is /$NS/strings/$key/$hostname = $data
path := fmt.Sprintf("/%s/strings/%s", NS, key)
// new key structure is $NS/strings/$key/$hostname = $data
path := fmt.Sprintf("%s/strings/%s", NS, key)
ch := make(chan error, 1)
// FIXME: fix our API so that we get a close event on shutdown.
callback := func(re *RE) error {
@@ -52,12 +52,12 @@ func WatchStrMap(obj *EmbdEtcd, key string) chan error {
// GetStrMap collects all of the strings which match a namespace in etcd.
func GetStrMap(obj *EmbdEtcd, hostnameFilter []string, key string) (map[string]string, error) {
// old key structure is /$NS/strings/$hostname/$key = $data
// new key structure is /$NS/strings/$key/$hostname = $data
// old key structure is $NS/strings/$hostname/$key = $data
// new key structure is $NS/strings/$key/$hostname = $data
// FIXME: if we have the $key as the last token (old key structure), we
// can allow the key to contain the slash char, otherwise we need to
// verify that one isn't present in the input string.
path := fmt.Sprintf("/%s/strings/%s", NS, key)
path := fmt.Sprintf("%s/strings/%s", NS, key)
keyMap, err := obj.Get(path, etcd.WithPrefix(), etcd.WithSort(etcd.SortByKey, etcd.SortAscend))
if err != nil {
return nil, errwrap.Wrapf(err, "could not get strings in: %s", key)
@@ -92,8 +92,8 @@ func GetStrMap(obj *EmbdEtcd, hostnameFilter []string, key string) (map[string]s
// nil, then it deletes the key. Otherwise the value should point to a string.
// TODO: TTL or delete disconnect?
func SetStrMap(obj *EmbdEtcd, hostname, key string, data *string) error {
// key structure is /$NS/strings/$key/$hostname = $data
path := fmt.Sprintf("/%s/strings/%s/%s", NS, key, hostname)
// key structure is $NS/strings/$key/$hostname = $data
path := fmt.Sprintf("%s/strings/%s/%s", NS, key, hostname)
ifs := []etcd.Cmp{} // list matching the desired state
ops := []etcd.Op{} // list of ops in this transaction (then)
els := []etcd.Op{} // list of ops in this transaction (else)