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cargo liquid 编译合约错误
根据说明文档 https://liquid-doc.readthedocs.io/zh_CN/latest/docs/quickstart/prerequisite.html 配置好环境之后。
尝试编译 HelloWorld 例子合约，开始遇到 proc-macro2 等一些依赖库报错，在修改 HelloWorld 示例合约部分依赖库版本之后继续编译，提示需要 edition2021 特性，编译出现如下错误：
[1/4] 🔍 Collecting crate metadata
[2/4] 🚚 Building cargo project
error: failed to parse manifest at `/tmp/cargo-xbuildqtQwtT/Cargo.toml`
Caused by:
feature `edition2021` is required
consider adding `cargo-features = ["edition2021"]` to the manifest
ERROR: Building with xargo
Caused by:
`"/home/john/.rustup/toolchains/nightly-2021-06-23-x86_64-unknown-linux-gnu/bin/cargo" "rustc" "-p" "alloc" "--release" "--manifest-path" "/tmp/cargo-xbuildqtQwtT/Cargo.toml" "--target" "wasm32-unknown-unknown" "--" "-Z" "force-unstable-if-unmarked"` failed with exit code: Some(101)
根据提示修改 Cargo.toml，在文件顶部增加 cargo-features = ["edition2021"]，报错如下：
[1/4] 🔍 Collecting crate metadata
[2/4] 🚚 Building cargo project
Compiling core v0.0.0 (/home/john/.rustup/toolchains/nightly-2021-06-23-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core)
Compiling compiler_builtins v0.1.45
Compiling rustc-std-workspace-core v1.99.0 (/home/john/.rustup/toolchains/nightly-2021-06-23-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/rustc-std-workspace-core)
Compiling alloc v0.0.0 (/tmp/cargo-xbuildLJMsg2)
Finished release [optimized] target(s) in 19.60s
error[E0463]: can't find crate for `std`
|
= note: the `wasm32-unknown-unknown` target may not support the standard library
= note: `std` is required by `predicates_core` because it does not declare `#![no_std]`
= help: consider building the standard library from source with `cargo build -Zbuild-std`
error: aborting due to previous error
For more information about this error, try `rustc --explain E0463`.
error[E0463]: can't find crate for `std`
|
= note: the `wasm32-unknown-unknown` target may not support the standard library
= note: `std` is required by `bumpalo` because it does not declare `#![no_std]`
= help: consider building the standard library from source with `cargo build -Zbuild-std`
error: could not compile `predicates-core`
To learn more, run the command again with --verbose.
error: aborting due to previous error
For more information about this error, try `rustc --explain E0463`.
error: build failed
ERROR: xbuild failed with status exit status: 101
目前提供的编译链因为当时使用的版本老旧，很多库已升级（patch不兼容），使得编译链无法正常使用，似乎难以找到整套兼容的依赖。 官方有无好的解决方案，或是当时有无封装可用容器？
现在这个问题是liquid锁定的编译器版本过于老旧导致的，我们已经在着手解决这个问题了 按下述步骤尝试一下
- 重新安装最新版的caego-liquid
cargo install --git https://github.com/WeBankBlockchain/cargo-liquid --branch main --locked --force
- 更新合约项目中
Cargo.toml的liquid，如下
liquid_lang = { git = "https://github.com/WeBankBlockchain/liquid", rev = "c678d9586b4335fc302a4c02a564d8ee6964be1d", package = "liquid_lang", default-features = false, features = ["contract"] }
liquid_primitives = { git = "https://github.com/WeBankBlockchain/liquid", rev = "c678d9586b4335fc302a4c02a564d8ee6964be1d", package = "liquid_primitives", default-features = false }
liquid_prelude = { git = "https://github.com/WeBankBlockchain/liquid", rev = "c678d9586b4335fc302a4c02a564d8ee6964be1d", package = "liquid_prelude", default-features = false }
liquid_macro = { git = "https://github.com/WeBankBlockchain/liquid", rev = "c678d9586b4335fc302a4c02a564d8ee6964be1d", package = "liquid_macro", default-features = false }
liquid_abi_gen = { git = "https://github.com/WeBankBlockchain/liquid", rev = "c678d9586b4335fc302a4c02a564d8ee6964be1d", package = "liquid_abi_gen", default-features = false, optional = true }
- 再次编译
