diff options
Diffstat (limited to 'sdk/sdk.go')
| -rw-r--r-- | sdk/sdk.go | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/sdk/sdk.go b/sdk/sdk.go index 2c84a2e88..6ca851217 100644 --- a/sdk/sdk.go +++ b/sdk/sdk.go @@ -358,15 +358,36 @@ var _ android.ExcludeFromApexContentsTag = dependencyTag{} // For dependencies from an in-development version of an SDK member to frozen versions of the same member // e.g. libfoo -> libfoo.mysdk.11 and libfoo.mysdk.12 +// +// The dependency represented by this tag requires that for every APEX variant created for the +// `from` module that an equivalent APEX variant is created for the 'to' module. This is because an +// APEX that requires a specific version of an sdk (via the `uses_sdks` property will replace +// dependencies on the unversioned sdk member with a dependency on the appropriate versioned sdk +// member. In order for that to work the versioned sdk member needs to have a variant for that APEX. +// As it is not known at the time that the APEX variants are created which specific APEX variants of +// a versioned sdk members will be required it is necessary for the versioned sdk members to have +// variants for any APEX that it could be used within. +// +// If the APEX selects a versioned sdk member then it will not have a dependency on the `from` +// module at all so any dependencies of that module will not affect the APEX. However, if the APEX +// selects the unversioned sdk member then it must exclude all the versioned sdk members. In no +// situation would this dependency cause the `to` module to be added to the APEX hence why this tag +// also excludes the `to` module from being added to the APEX contents. type sdkMemberVersionedDepTag struct { dependencyTag member string version string } +func (t sdkMemberVersionedDepTag) AlwaysRequireApexVariant() bool { + return true +} + // Mark this tag so dependencies that use it are excluded from visibility enforcement. func (t sdkMemberVersionedDepTag) ExcludeFromVisibilityEnforcement() {} +var _ android.AlwaysRequireApexVariantTag = sdkMemberVersionedDepTag{} + // Step 1: create dependencies from an SDK module to its members. func memberMutator(mctx android.BottomUpMutatorContext) { if s, ok := mctx.Module().(*sdk); ok { |