From 9e19c36b42de0a2230404720d37504f0bf7e6031 Mon Sep 17 00:00:00 2001
From: Surma <surma@surma.link>
Date: Thu, 7 Feb 2019 00:28:28 +0000
Subject: [PATCH] Add Xargo and config and stuff

---
 codecs/oxipng/Cargo.toml     |  3 ++-
 codecs/oxipng/Xargo.toml     |  5 +++++
 codecs/oxipng/tmp/.gitignore |  1 +
 codecs/oxipng/tmp/Cargo.toml | 27 +++++++++++++++++++++++++++
 codecs/oxipng/tmp/Xargo.toml |  2 ++
 codecs/oxipng/tmp/_README.md | 20 ++++++++++++++++++++
 codecs/oxipng/tmp/lib.rs     | 10 ++++++++++
 7 files changed, 67 insertions(+), 1 deletion(-)
 create mode 100644 codecs/oxipng/Xargo.toml
 create mode 100644 codecs/oxipng/tmp/.gitignore
 create mode 100644 codecs/oxipng/tmp/Cargo.toml
 create mode 100644 codecs/oxipng/tmp/Xargo.toml
 create mode 100644 codecs/oxipng/tmp/_README.md
 create mode 100644 codecs/oxipng/tmp/lib.rs

diff --git a/codecs/oxipng/Cargo.toml b/codecs/oxipng/Cargo.toml
index eeb7fece..e7c7d701 100644
--- a/codecs/oxipng/Cargo.toml
+++ b/codecs/oxipng/Cargo.toml
@@ -1,9 +1,10 @@
 [package]
-name = "oxipng-wasm"
+name = "test"
 version = "0.1.0"
 authors = ["Surma <surma@surma.link>"]
 
 [lib]
+path = "lib.rs"
 crate-type = ["cdylib", "rlib"]
 
 [features]
diff --git a/codecs/oxipng/Xargo.toml b/codecs/oxipng/Xargo.toml
new file mode 100644
index 00000000..60fbc181
--- /dev/null
+++ b/codecs/oxipng/Xargo.toml
@@ -0,0 +1,5 @@
+[target.wasm32-unknown-unknown.dependencies]
+time = {}
+
+[target.wasm32-unknown-unknown.dependencies.std]
+features = ["wasm_syscall"]
diff --git a/codecs/oxipng/tmp/.gitignore b/codecs/oxipng/tmp/.gitignore
new file mode 100644
index 00000000..eb5a316c
--- /dev/null
+++ b/codecs/oxipng/tmp/.gitignore
@@ -0,0 +1 @@
+target
diff --git a/codecs/oxipng/tmp/Cargo.toml b/codecs/oxipng/tmp/Cargo.toml
new file mode 100644
index 00000000..df842ed0
--- /dev/null
+++ b/codecs/oxipng/tmp/Cargo.toml
@@ -0,0 +1,27 @@
+[package]
+name = "loltest"
+version = "0.1.0"
+authors = ["Surma <surma@surma.link>"]
+
+[lib]
+path = "lib.rs"
+crate-type = ["cdylib", "rlib"]
+
+[features]
+default = ["console_error_panic_hook"]
+
+[dependencies]
+wasm-bindgen = "0.2"
+
+# The `console_error_panic_hook` crate provides better debugging of panics by
+# logging them with `console.error`. This is great for development, but requires
+# all the `std::fmt` and `std::panicking` infrastructure, so isn't great for
+# code size when deploying.
+console_error_panic_hook = { version = "0.1.1", optional = true }
+
+[dev-dependencies]
+wasm-bindgen-test = "0.2"
+
+[profile.release]
+# Tell `rustc` to optimize for small code size.
+opt-level = "s"
diff --git a/codecs/oxipng/tmp/Xargo.toml b/codecs/oxipng/tmp/Xargo.toml
new file mode 100644
index 00000000..5f349062
--- /dev/null
+++ b/codecs/oxipng/tmp/Xargo.toml
@@ -0,0 +1,2 @@
+[dependencies.std]
+features = ["wasm_syscall"]
diff --git a/codecs/oxipng/tmp/_README.md b/codecs/oxipng/tmp/_README.md
new file mode 100644
index 00000000..32158d69
--- /dev/null
+++ b/codecs/oxipng/tmp/_README.md
@@ -0,0 +1,20 @@
+I’m trying to activate [the `wasm_syscall` feature][1] in Rust’s stdlib for WebAssembly.
+
+Here is my `Cargo.toml` and my `Xargo.toml`. But even with this setup the generated wasm file is still hard-coded to panic.
+
+**HELP?**
+
+My current command to compile is:
+
+```
+xargo build --target wasm32-unknown-unknown --release
+```
+
+If you have [`wasm2wat`][2] installed, you can verify the generate code via
+
+```
+wasm2wat target/wasm32-unknown-unknown/release/loltest.wasm | grep -A5 perform::
+```
+
+[1]: https://github.com/rust-lang/rust/blob/b139669f374eb5024a50eb13f116ff763b1c5935/src/libstd/sys/wasm/mod.rs#L309
+[2]: https://github.com/WebAssembly/wabt
diff --git a/codecs/oxipng/tmp/lib.rs b/codecs/oxipng/tmp/lib.rs
new file mode 100644
index 00000000..d632314d
--- /dev/null
+++ b/codecs/oxipng/tmp/lib.rs
@@ -0,0 +1,10 @@
+extern crate wasm_bindgen;
+
+use wasm_bindgen::prelude::*;
+use std::time::{Instant};
+
+#[wasm_bindgen]
+pub fn doit() -> u32 {
+  let start = Instant::now();
+  start.elapsed().as_secs() as u32
+}