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build-rust-crate: ensure info about build.rs failures reaches the log #190592

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build-rust-crate: ensure info about build.rs failures reaches the log #190592

wants to merge 1 commit into from

Commits on Sep 10, 2022

  1. build-rust-crate: ensure info about build.rs failures reaches the log 

    When execution of a `build.rs` script fails, information about the failure is
sent to stdout (using "cargo:foo=" prefixes) rather than stderr.  Because of
this, information needed to diagnose the failure is not available in `nix log`.
An example of that information is found below.

Let's do the simplest thing possible, and replace `>` with `tee` so the output
of executing `build.rs` gets copied to the log.

  cargo:warning=Could not run `"pkg-config" "--libs" "--cflags" "cairo" "cairo >= 1.14"`
  The pkg-config command could not be found.

  Most likely, you need to install a pkg-config package for your OS.
  Try `apt install pkg-config`, or `yum install pkg-config`,
  or `pkg install pkg-config` depending on your distribution.

  If you've already installed it, ensure the pkg-config command is one of the
  directories in the PATH environment variable.

  If you did not expect this build to link to a pre-installed system library,
  then check documentation of the cairo-sys-rs crate for an option to
  build the library from source, or disable features or dependencies
  that require pkg-config.
    Adam Joseph committed Sep 10, 2022
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