53 lines
1.9 KiB
Markdown
53 lines
1.9 KiB
Markdown
# gennames
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For large projects, it may be useful to generate an index of package names for commonly used packages.
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The index of names can be added to each generated file using `File.ImportNames`. The `gennames` command
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is used internally to generate the list of standard library package names.
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### Usage
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```
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Usage of gennames:
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-filter string
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Regex to filter paths (operates on full path including vendor directory) (default ".*")
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-name string
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Name of the variable to define (default "PackageNames")
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-novendor
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Exclude packages in vendor directories
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-output string
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Output filename to write (default "./package-names.go")
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-package string
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Package name in generated file (default "main")
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-path string
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Path to pass to go list command (default "all")
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-standard
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Use standard library packages
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```
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### Path
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Supply a `path` to pass to the `go list` command. You may use the wildcard `/...` to recursively return
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packages, but it's worth remembering that vendored packages are not returned by this method unless the
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path itself is a vendored path. Use `all` to return all packages in your `GOPATH` (including vendored
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packages), however remember this may take some time for a large `GOPATH`.
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### Filter
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Supply a regex `filter` to limit the packages that are returned by the `go list` command. The filter
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operates on the full vendored package path (e.g. `github.com/foo/bar/vendor/github.com/baz/qux`), however
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the package path added to the index is unvendored (e.g. `github.com/baz/qux`).
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### Examples
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```
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gennames -filter "foo|bar"
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```
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Create a file named `package-names.go` with `package main` listing the names of all packages with paths
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containing `foo` or `bar`.
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```
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gennames -output "foo/names.go" -package "foo" -path "github.com/foo/bar/vendor/..."
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```
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Create a file named `foo/names.go` with `package foo` listing the names of all packages that are vendored
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inside `github.com/foo/bar`.
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