Label
A BUILD target identifier.Members
Label
Label Label(label_string)Creates a Label referring to a BUILD target. Use this function only when you want to give a default value for the label attributes. The argument must refer to an absolute label. The repo part of the label (or its absence) is interpreted in the context of the repo where this Label() call appears. Example:
Label("//tools:default")
Parameters
Parameter | Description |
---|---|
label_string
|
required the label string. |
name
string Label.nameThe name of this label within the package. For instance:
Label("//pkg/foo:abc").name == "abc"
package
string Label.packageThe package part of this label. For instance:
Label("//pkg/foo:abc").package == "pkg/foo"
relative
Label Label.relative(relName)Resolves a label that is either absolute (starts with
//
) or relative to the current package. If this label is in a remote repository, the argument will be resolved relative to that repository. If the argument contains a repository name, the current label is ignored and the argument is returned as-is, except that the repository name is rewritten if it is in the current repository mapping. Reserved labels will also be returned as-is.For example:
Label("//foo/bar:baz").relative(":quux") == Label("//foo/bar:quux") Label("//foo/bar:baz").relative("//wiz:quux") == Label("//wiz:quux") Label("@repo//foo/bar:baz").relative("//wiz:quux") == Label("@repo//wiz:quux") Label("@repo//foo/bar:baz").relative("//visibility:public") == Label("//visibility:public") Label("@repo//foo/bar:baz").relative("@other//wiz:quux") == Label("@other//wiz:quux")
If the repository mapping passed in is {'@other' : '@remapped'}
, then the following remapping will take place:
Label("@repo//foo/bar:baz").relative("@other//wiz:quux") == Label("@remapped//wiz:quux")
Parameters
Parameter | Description |
---|---|
relName
|
required The label that will be resolved relative to this one. |
workspace_name
string Label.workspace_nameThe repository part of this label. For instance,
Label("@foo//bar:baz").workspace_name == "foo"
workspace_root
string Label.workspace_rootReturns the execution root for the workspace of this label, relative to the execroot. For instance:
Label("@repo//pkg/foo:abc").workspace_root == "external/repo"