如何安装ruby-augeas gem？(macOS Mojave)

Question

昨天我花了一整天的时间来寻找安装ruby-augeas的明确答案。我找不到一个好的解决方案。

如何安装？

安装时出现错误：

gem install ruby-augeas
    Building native extensions. This could take a while...
    ERROR:  Error installing ruby-augeas:
        ERROR: Failed to build gem native extension.

        current directory: /Users/vmware/.rvm/gems/ruby-2.4.4/gems/ruby-augeas-0.5.0/ext/augeas
    /Users/vmware/.rvm/rubies/ruby-2.4.4/bin/ruby -I /Users/vmware/.rvm/rubies/ruby-2.4.4/lib/ruby/site_ruby/2.4.0 -r ./siteconf20190923-73327-iy4kfy.rb extconf.rb
    creating Makefile

    current directory: /Users/vmware/.rvm/gems/ruby-2.4.4/gems/ruby-augeas-0.5.0/ext/augeas
    make "DESTDIR=" clean

    current directory: /Users/vmware/.rvm/gems/ruby-2.4.4/gems/ruby-augeas-0.5.0/ext/augeas
    make "DESTDIR="
    compiling _augeas.c
    In file included from _augeas.c:25:
    /usr/local/Cellar/augeas/1.12.0/include/augeas.h:24:10: fatal error: 'libxml/tree.h' file not found
    #include <libxml/tree.h>
             ^~~~~~~~~~~~~~~
    1 error generated.
    make: *** [_augeas.o] Error 1

    make failed, exit code 2

    Gem files will remain installed in /Users/vmware/.rvm/gems/ruby-2.4.4/gems/ruby-augeas-0.5.0 for inspection.
    Results logged to /Users/vmware/.rvm/gems/ruby-2.4.4/extensions/x86_64-darwin-18/2.4.0/ruby-augeas-0.5.0/gem_make.out

我还安装了brew install augeas pkg-config，但它显示相同的错误。

Answer 1

最后，我解决了这个问题。

export PKG_CONFIG_PATH="/usr/local/opt/libxml2/lib/pkgconfig"

这就是你所需要的。配置脚本将运行pkg-config以找出要添加到LDFLAGS和CPPFLAGS中的内容。

来源：https://github.com/remacs/remacs/issues/886