Set toolchain to 1.70, and make it easier to update toolchains.

.github/workflows/rust.yml

@@ -32,7 +32,7 @@ jobs:
           )
       - uses: dtolnay/rust-toolchain@stable
         with:
-          toolchain: stable
+          toolchain: "1.70.0"
           components: clippy, rustfmt
       - uses: actions/checkout@v3
       - name: Rust format

rust_dev_preview/cross_service/rust-toolchain.toml

@@ -1,3 +1,3 @@
 # This should be kept in sync with https://github.com/awslabs/aws-sdk-rust#supported-rust-versions-msrv
 [toolchain]
-channel = "stable"
+channel = "1.70.0"

rust_dev_preview/examples/rust-toolchain.toml

@@ -1,3 +1,3 @@
 # This should be kept in sync with https://github.com/awslabs/aws-sdk-rust#supported-rust-versions-msrv
 [toolchain]
-channel = "1.69.0"
+channel = "1.70.0"

rust_dev_preview/tools/set_rust_version.py

@@ -0,0 +1,85 @@
+#!/usr/bin/env python3
+
+try:
+    import tomlkit
+except:
+    print("Couldn't import tomlkit, either install it directly or instantiate a venv.")
+    exit(1)
+
+from glob import glob
+import argparse
+import logging
+import pathlib
+
+
+def read_toml(path: pathlib.Path) -> tomlkit.TOMLDocument:
+    with open(path, "rt") as file:
+        return tomlkit.parse(file.read())
+
+
+def write_toml(path: pathlib.Path, toml: tomlkit.TOMLDocument):
+    with open(path, "wt") as file:
+        tomlkit.dump(toml, file)
+
+
+def update_toolchains(root: pathlib.Path, channel: str, dry_run: bool):
+    for file in glob(f"{root}/rust_dev_preview/**/rust-toolchain.toml", recursive=True):
+        toolchain_toml = read_toml(file)
+        logging.debug(
+            f"Setting {file} to {channel} from {toolchain_toml['toolchain']['channel']}"
+        )
+        toolchain_toml["toolchain"]["channel"] = channel
+        if not dry_run:
+            write_toml(file, toolchain_toml)
+
+
+def update_actions(root: pathlib.Path, channel: str, dry_run: bool):
+    rust_yaml = root / ".github" / "workflows" / "rust.yml"
+    with open(rust_yaml, "rt") as file:
+        action = file.readlines()
+    found = None
+    for i, line in enumerate(action):
+        if "toolchain:" in line:
+            sep = line.find(":")
+            found = i, line[sep + 2 :]
+            action[i] = f'{line[: sep + 1]} "{channel}"\n'
+    if found == None:
+        raise Exception(f"Did not find toolchain entry in {rust_yaml}")
+    logging.debug(f"Setting {rust_yaml} to {channel} from {found}")
+    if not dry_run:
+        with open(rust_yaml, "wt") as file:
+            file.writelines(action)
+
+
+argument_parser = argparse.ArgumentParser()
+argument_parser.add_argument(
+    "--root",
+    type=pathlib.Path,
+    default=pathlib.Path(__file__).absolute().parent.parent.parent,
+    help="Root path for aws-doc-sdk-examples. Default ../../ assumes running this script from its location in tools.",
+)
+argument_parser.add_argument(
+    "channel", help="Toolchain channel to use for Rust code examples."
+)
+argument_parser.add_argument(
+    "--dry-run",
+    dest="dry_run",
+    action="store_true",
+    default=False,
+    help="Don't write updated files.",
+)
+argument_parser.add_argument(
+    "--verbose", action="store_true", default=False, help="Write verbose logging"
+)
+
+
+def main():
+    args = argument_parser.parse_args()
+    if args.verbose:
+        logging.basicConfig(level=logging.DEBUG)
+    update_toolchains(args.root, args.channel, args.dry_run)
+    update_actions(args.root, args.channel, args.dry_run)
+
+
+if __name__ == "__main__":
+    main()