[swift-evolution] lifecycle hooks/scripts in swift package manager

[Vadim Eisenberg]

Are there any plans to support lifecycle hooks/scripts in swift package 
manager ?

According to the community proposal:
https://github.com/apple/swift-package-manager/blob/master/Documentation/PackageManagerCommunityProposal.md#support-for-other-build-systems 


We are considering supporting hooks for the Swift Package Manager to call 
out to other build systems, and/or to invoke shell scripts.

This way, swift package manager will become a build automation tool, 
similar to npm and maven. npm seems like the most similar tool to swift 
package manager. It has "scripts" property - 
https://docs.npmjs.com/misc/scripts:

npm supports the "scripts" property of the package.json script, for the 
following scripts: pre/post install, pre/post test. etc.

Using lifecycle scripts can facilitate build automation of swift projects, 
for example it can enable code generation. LinuxMain.swift and allTests 
fields can be generated automatically during the build process.

Before lifecycle scripts are supported, for build automation swift package 
manager has to be used with some build automation tool like make, and the 
build automation information is spread between Package.swift and Makefile 
files.

Best Regards,
Vadim Eisenberg

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