当“cargo install"由于系统配置问题而失败时，如何避免重建依赖项? [英] How can I avoid rebuilding dependencies when `cargo install` fails due to a system configuration issue?

问题描述

我正在尝试 cargo install 一个具有许多依赖项的项目.由于某些系统配置问题，后来的依赖项之一无法构建:

I'm trying to cargo install a project with many dependencies. One of the later dependencies fails to build due to some system configuration issue:

cargo install diesel_cli
   ... many dependencies here...
   Compiling diesel_cli v1.4.1
error: linking with `cc` failed: exit code: 1
  |
  = note: ...large output removed...
  = note: ld: library not found for -lmysqlclient
          clang: error: linker command failed with exit code 1 (use -v to see invocation)

一旦我认为我已经解决了系统配置问题，我需要重新运行cargo install，等待第一组依赖项构建，然后看看我是否通过了失败.

Once I think I've solved the system configuration issue, I need to re-run cargo install, wait a while for the first set of dependencies to build, then see if I get past the failure.

如何避免重建所有这些依赖项?

How can I avoid rebuilding all of those dependencies?

推荐答案

错误消息包含包含失败构建工件的目录:

The error message contains the directory containing the failed build artifacts:

error: failed to compile `diesel_cli v1.4.1`, intermediate artifacts can be found at `/var/folders/_b/d4_bd15x7s5g99cjvyhpw26w0000gp/T/cargo-installDQOdPD`

您可以通过 --target-dir 选项(或设置 CARGO_TARGET_DIR 环境变量)传递该目录以再次使用它，避免重建依赖项:

You can pass that directory via the --target-dir option (or setting the CARGO_TARGET_DIR environment variable) to use it again, avoiding rebuilding the dependencies:

cargo install diesel_cli --target-dir=/var/folders/_b/d4_bd15x7s5g99cjvyhpw26w0000gp/T/cargo-installDQOdPD

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