Add completion for examples #149
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To get a list of all the examples in a project we can use the cargo metadata command and filter through the targets that have "example" kind. We need to pass the --no-deps flags so that we ignore targets from dependencies.
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This PR adds completion support to
M-x cargo-process-run-example. It shells out tocargo metadata --no-depsto retrieve the list of examples.One 'cons' is that it adds cl-lib, due to me being more familiar with Common Lisp than Elisp. Others may the JSON drilling to be done using map.el or seq.elI saw that cargo.el already uses cl-lib (cl-loop), it is simply missing therequireform + being explicitly declared as a dependency