Switch from cfg = "host" to "exec"

This will be required for bazel 7.0 due to bazelbuild/bazel#17032.

Author: mostynb

container/flatten.bzl

@@ -54,7 +54,7 @@ container_flatten = rule(
         ),
         "_flattener": attr.label(
             default = Label("//container/go/cmd/flattener"),
-            cfg = "host",
+            cfg = "exec",
             executable = True,
             allow_files = True,
         ),

container/image.bzl

@@ -588,7 +588,7 @@ _attrs = dicts.add(_layer.attrs, {
     ),
     "create_image_config": attr.label(
         default = Label("//container/go/cmd/create_image_config:create_image_config"),
-        cfg = "host",
+        cfg = "exec",
         executable = True,
         allow_files = True,
     ),
@@ -749,7 +749,7 @@ _attrs = dicts.add(_layer.attrs, {
     ),
     "_digester": attr.label(
         default = "//container/go/cmd/digester",
-        cfg = "host",
+        cfg = "exec",
         executable = True,
     ),
 }, _hash_tools, _layer_tools)

container/layer.bzl

@@ -284,7 +284,7 @@ def _impl(
 _layer_attrs = dicts.add({
     "build_layer": attr.label(
         default = Label("//container:build_tar"),
-        cfg = "host",
+        cfg = "exec",
         executable = True,
         allow_files = True,
     ),

container/layer_tools.bzl

@@ -309,7 +309,7 @@ def incremental_load(
 tools = {
     "extract_config": attr.label(
         default = Label("//container/go/cmd/extract_config:extract_config"),
-        cfg = "host",
+        cfg = "exec",
         executable = True,
         allow_files = True,
     ),
@@ -319,7 +319,7 @@ tools = {
     ),
     "_join_layers": attr.label(
         default = Label("//container/go/cmd/join_layers"),
-        cfg = "host",
+        cfg = "exec",
         executable = True,
     ),
 }

container/pull.bzl

@@ -91,25 +91,25 @@ _container_pull_attrs = {
     "puller_darwin": attr.label(
         executable = True,
         default = Label("@go_puller_darwin//file:downloaded"),
-        cfg = "host",
+        cfg = "exec",
         doc = "Exposed to provide a way to test other pullers on macOS",
     ),
     "puller_linux_amd64": attr.label(
         executable = True,
         default = Label("@go_puller_linux_amd64//file:downloaded"),
-        cfg = "host",
+        cfg = "exec",
         doc = "Exposed to provide a way to test other pullers on Linux",
     ),
     "puller_linux_arm64": attr.label(
         executable = True,
         default = Label("@go_puller_linux_arm64//file:downloaded"),
-        cfg = "host",
+        cfg = "exec",
         doc = "Exposed to provide a way to test other pullers on Linux",
     ),
     "puller_linux_s390x": attr.label(
         executable = True,
         default = Label("@go_puller_linux_s390x//file:downloaded"),
-        cfg = "host",
+        cfg = "exec",
         doc = "Exposed to provide a way to test other pullers on Linux",
     ),
     "registry": attr.string(

container/push.bzl

@@ -200,12 +200,12 @@ container_push_ = rule(
         ),
         "_digester": attr.label(
             default = "//container/go/cmd/digester",
-            cfg = "host",
+            cfg = "exec",
             executable = True,
         ),
         "_pusher": attr.label(
             default = "//container/go/cmd/pusher",
-            cfg = "host",
+            cfg = "exec",
             executable = True,
             allow_files = True,
         ),

contrib/automatic_container_release/metadata_merge.bzl

@@ -73,7 +73,7 @@ metadata_merge = rule(
         ),
         "_merger": attr.label(
             default = "@io_bazel_rules_docker//contrib/go/cmd/metadata_merge",
-            cfg = "host",
+            cfg = "exec",
             executable = True,
             doc = "The go binary that merges a given list of YAML files to " +
                   "produce a single output YAML.",

contrib/automatic_container_release/packages_metadata.bzl

@@ -44,7 +44,7 @@ packages_metadata = rule(
         ),
         "_converter": attr.label(
             default = "@io_bazel_rules_docker//contrib/go/cmd/packages_metadata",
-            cfg = "host",
+            cfg = "exec",
             executable = True,
         ),
     },

contrib/compare_ids_test.bzl

@@ -84,7 +84,7 @@ compare_ids_test = rule(
             allow_files = True,
             default = ":compare_ids_test",
             executable = True,
-            cfg = "host",
+            cfg = "exec",
         ),
     },
     test = True,

contrib/passwd.bzl

@@ -138,7 +138,7 @@ passwd_tar = rule(
     attrs = {
         "build_tar": attr.label(
             default = Label("//container:build_tar"),
-            cfg = "host",
+            cfg = "exec",
             executable = True,
             allow_files = True,
         ),