Bazel: how to create genrule that uses cmd on linux and cmd_bat on windows?

Question

I'd like to make Bazel rules that don't depend on Bash on Windows.

I see that in a genrule, you can use cmd_bat instead of cmd (which requires bash). But how can I define the rule so that there is a cmd attribute and a cmd_bat attribute, and on Windows only cmd_bat is used and everywhere else cmd is used?

score 2 · Accepted Answer · answered Jun 10 '20 at 17:45

2

In Bazel 3.2.0 cmd_bat is only consided on Windows. In other OS it is simply ignored. cmd_bat has a higher priority than cmd.

answered Jun 10 '20 at 17:45

Vertexwahn

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does 'higher priority' mean that if there is a cmd_bat AND a cmd, that the cmd will be ignored? – matthias_buehlmann Jun 10 '20 at 18:33
great, thanks! I interpreted it as being always executed first – matthias_buehlmann Jun 10 '20 at 18:40

Bazel: how to create genrule that uses cmd on linux and cmd_bat on windows?

1 Answers1