diff options
Diffstat (limited to 'site/docs/skylark')
| -rw-r--r-- | site/docs/skylark/cookbook.md | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/site/docs/skylark/cookbook.md b/site/docs/skylark/cookbook.md index 8dfe03ebe2..3a5430a29d 100644 --- a/site/docs/skylark/cookbook.md +++ b/site/docs/skylark/cookbook.md @@ -527,9 +527,14 @@ execute( Bazel needs to know about all dependencies before doing the analysis phase and calling the implementation function. Dependencies can be computed based on the -rule attributes and the configuration: to do so, use a function as the default +rule attributes: to do so, use a function as the default value of an attribute (the attribute must be private and have type `label` or -`list of labels`). +`list of labels`). The parameters of this function must correspond to the +attributes that are accessed in the function body. + +Note: For legacy reasons, the function takes the configuration as an additional +parameter. Please do not rely on the configuration since it will be removed in +the future. The example below computes the md5 sum of a file. The file can be preprocessed using a filter. The exact dependencies depend on the filter chosen by the user. @@ -543,10 +548,10 @@ _filters = { "none": None, } -def _get_filter(attr_map, cfg): +def _get_filter(filter, cfg=None): # requires attribute "filter" # Return the value for the attribute "_filter_bin" # It can be a label or None. - return _filters[attr_map.filter] + return _filters[filter] def _impl(ctx): src = ctx.file.src |