aws-sdk-for-zig/README.md

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AWS SDK for Zig
===============
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[Zig 0.12](https://ziglang.org/download/#release-0.12.0):
[![Build Status: Zig 0.12.0](https://git.lerch.org/lobo/aws-sdk-for-zig/actions/workflows/build.yaml/badge.svg)](https://git.lerch.org/lobo/aws-sdk-for-zig/actions?workflow=build.yaml&state=closed)
[Last Mach Nominated Zig Version](https://machengine.org/about/nominated-zig/):
[![Build Status: Mach nominated](https://git.lerch.org/lobo/aws-sdk-for-zig/actions/workflows/zig-mach.yaml/badge.svg?branch=zig-develop)](https://git.lerch.org/lobo/aws-sdk-for-zig/actions?workflow=zig-mach.yaml&state=closed)
[Nightly Zig](https://ziglang.org/download/):
[![Build Status: Zig Nightly](https://git.lerch.org/lobo/aws-sdk-for-zig/actions/workflows/zig-nightly.yaml/badge.svg?branch=zig-develop)](https://git.lerch.org/lobo/aws-sdk-for-zig/actions?workflow=zig-nightly.yaml&state=closed)
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Current executable size for the demo is 980k after compiling with -Doptimize=ReleaseSmall
in x86_linux, and will vary based on services used. Tested targets:
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* x86_64-linux
* riscv64-linux\*
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* aarch64-linux
* x86_64-windows\*\*
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* arm-linux
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* aarch64-macos
* x86_64-macos
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Tested targets are built, but not continuously tested, by CI.
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\* On Zig 0.12, riscv64-linux tests take a significant time to compile (each aws.zig test takes approximately 1min, 45 seconds to compile on Intel i9 10th gen)
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\*\* On Zig 0.12, x86_64-windows tests have one test skipped as LLVM consumes all available RAM on the system
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Zig-Develop Branch
------------------
This branch is intended for use with the in-development version of Zig. This
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starts with 0.12.0-dev.3180+83e578a18. I will try to keep this branch up to date
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with latest, but with a special eye towards aligning with [Mach Engine's Nominated
Zig Versions](https://machengine.org/about/nominated-zig/). As nightly zig versions
disappear off the downloads page (and back end server), we can use the mirroring
that the Mach Engine participates in to pull these versions.
Building
--------
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`zig build` should work. It will build the code generation project, fetch model
files from upstream AWS Go SDK v2, run the code generation, then build the main
project with the generated code. Testing can be done with `zig test`.
Using
-----
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This is designed for use with the Zig 0.11 package manager, and exposes a module
called "aws". Set up `build.zig.zon` and add the dependency/module to your project
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as normal and the package manager should do its thing. A full example can be found
in [/example](example/README.md).
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Configuring the module and/or Running the demo
----------------------------------------------
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This library mimics the aws c libraries for it's work, so it operates like most
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other 'AWS things'. [/src/main.zig](src/main.zig) gives you a handful of examples
for working with services. For local testing or alternative endpoints, there's
no real standard, so there is code to look for `AWS_ENDPOINT_URL` environment
variable that will supersede all other configuration.
Limitations
-----------
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WebIdentityToken is not yet implemented.
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TODO List:
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* Json parsing is based on a fork of the 0.9.0 (maybe earlier?) json parser.
This needs a re-visit. Note also that a json.zig file is embedded/copied
from the codegen project, so that also needs a second look.
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* Take a look to see about compilation speed. With codegen caching this is
reasonable, but still takes longer than needed.
* Upgrade the model files. This is a simple tasks, but I'd like the first
item on this list to be completed first.
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* Implement sigv4a signing
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* Implement jitter/exponential backoff
* Implement timeouts and other TODO's in the code
* Add option to cache signature keys
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Services without TLS 1.3 support
--------------------------------
All AWS services should support TLS 1.3 at this point, but there are many regions
and several partitions, and not all of them have been tested, so your mileage
may vary.
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Dependency tree
---------------
No dependencies:
* aws_authentication: base structure for credentials (only one type)
* aws_http_base: contains basic structures for http requests/results
* case: provides functions to change casing
* date: provides limited date manipulation functions
* http_client_17015_issue: zig 0.11 http client, with changes
* json: custom version of earlier stdlib json parser
* xml: custom xml parser library
* url: custom url encoding
aws_credentials: Allows credential handling
aws_authentication
aws_http:
http_client_17015_issue
aws_http_base
aws_signing
aws_signing: handles signing of http requests
aws_http_base
aws_authentication
date
aws: main usage point for libraries
aws_http
json
url
case
date
servicemodel
xml_shaper
aws_credentials
aws_authentication
main: main entrypoint for demo executable
aws
servicemodel: Provides access to all aws service generated models
all generated model files
xml_shaper: Manages interface from xml to in memory structures
xml
date