Drop support for building legacy oscontainer and extensions

These have been replaced by the new oscontainer format output by
`cosa build ostree` and the extensions container respectively.

See also: https://issues.redhat.com/browse/MCO-392

cmd/coreos-assembler.go

@@ -13,8 +13,8 @@ import (
 
 // commands we'd expect to use in the local dev path
 var buildCommands = []string{"init", "fetch", "build", "run", "prune", "clean", "list"}
-var advancedBuildCommands = []string{"buildfetch", "buildupload", "oc-adm-release", "push-container", "upload-oscontainer", "buildextend-extensions"}
-var buildextendCommands = []string{"aliyun", "applehv", "aws", "azure", "digitalocean", "exoscale", "extensions", "extensions-container", "gcp", "hashlist-experimental", "hyperv", "ibmcloud", "kubevirt", "legacy-oscontainer", "live", "metal", "metal4k", "nutanix", "openstack", "qemu", "secex", "virtualbox", "vmware", "vultr"}
+var advancedBuildCommands = []string{"buildfetch", "buildupload", "oc-adm-release", "push-container"}
+var buildextendCommands = []string{"aliyun", "applehv", "aws", "azure", "digitalocean", "exoscale", "extensions-container", "gcp", "hashlist-experimental", "hyperv", "ibmcloud", "kubevirt", "live", "metal", "metal4k", "nutanix", "openstack", "qemu", "secex", "virtualbox", "vmware", "vultr"}
 
 var utilityCommands = []string{"aws-replicate", "compress", "copy-container", "koji-upload", "kola", "push-container-manifest", "remote-build-container", "remote-prune", "remote-session", "sign", "tag", "update-variant"}
 var otherCommands = []string{"shell", "meta"}

docs/cosa.md

@@ -46,7 +46,6 @@ other platforms or cloud providers:
 | [buildextend-{aliyun,aws,azure,digitalocean,exoscale,gcp,vultr}](https://github.com/coreos/coreos-assembler/blob/main/src/cmd-ore-wrapper) | Generate artifacts for the given platforms
 | [buildextend-{azurestack,ibmcloud,openstack,vmware}](https://github.com/coreos/coreos-assembler/blob/main/src/cmd-artifact-disk) | Generate artifacts for the given platforms
 | [{aliyun,aws}-replicate](https://github.com/coreos/coreos-assembler/blob/main/src/cmd-ore-wrapper) | Replicate images on the platforms (AMIs for AWS)
-| [buildextend-legacy-oscontainer](https://github.com/coreos/coreos-assembler/blob/main/src/cmd-buildextend-legacy-oscontainer) | Create an oscontainer in legacy format (i.e. not OSTree-native)
 
 ## Misc commands
 
@@ -71,4 +70,3 @@ Those less commonly used commands are listed here:
 | [supermin-shell](https://github.com/coreos/coreos-assembler/blob/main/src/cmd-supermin-shell) | Get a supermin shell
 | [tag](https://github.com/coreos/coreos-assembler/blob/main/src/cmd-tag) | Operate on the tags in `builds.json`
 | [test-coreos-installer](https://github.com/coreos/coreos-assembler/blob/main/src/cmd-test-coreos-installer) | Automate an end-to-end run of coreos-installer with the metal image
-| [upload-oscontainer](https://github.com/coreos/coreos-assembler/blob/main/src/cmd-upload-oscontainer) | Upload an oscontainer (historical wrapper for `cosa oscontainer`)