rule_attributes
Information about attributes of a rule an aspect is applied to.
attr
struct rule_attributes.attr
A struct to access the values of the attributes. The values are provided by the user (if not, a default value is used). The attributes of the struct and the types of their values correspond to the keys and values of the
attrs dict provided to the
rule function.
See example of use.
executable
struct rule_attributes.executable
A
struct containing executable files defined in label type attributes marked as
executable=True. The struct fields correspond to the attribute names. Each value in the struct is either a
file or
None. If an optional attribute is not specified in the rule then the corresponding struct value is
None. If a label type is not marked as
executable=True, no corresponding struct field is generated.
See example of use.
file
struct rule_attributes.file
A
struct containing files defined in label type attributes marked as
allow_single_file. The struct fields correspond to the attribute names. The struct value is always a
file or
None. If an optional attribute is not specified in the rule then the corresponding struct value is
None. If a label type is not marked as
allow_single_file, no corresponding struct field is generated. It is a shortcut for:
list(ctx.attr.<ATTR>.files)[0]
In other words, use
file to access the (singular)
default output of a dependency.
See example of use.
files
struct rule_attributes.files
A
struct containing files defined in label or label list type attributes. The struct fields correspond to the attribute names. The struct values are
list of
files. It is a shortcut for:
[f for t in ctx.attr.<ATTR> for f in t.files]
In other words, use
files to access the
default outputs of a dependency.
See example of use.
kind
string rule_attributes.kind
The kind of a rule, such as 'cc_library'