packages: add NeedsChromeSource method

Add support for having the Build API indicate that the InstallPackages
call requires Chrome sources to have been synced.

BUG=chromium:1053703, chromium:1086714
TEST=generate

Change-Id: Ic5443a9b15f5ee030b016ff10ad978ee9cfcbd0e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2216237
Reviewed-by: Alex Klein <saklein@chromium.org>
Reviewed-by: George Engelbrecht <engeg@google.com>
Commit-Queue: LaMont Jones <lamontjones@chromium.org>
Tested-by: LaMont Jones <lamontjones@chromium.org>
diff --git a/go/chromite/api/packages.pb.go b/go/chromite/api/packages.pb.go
index 37055b5..68edbb2 100644
--- a/go/chromite/api/packages.pb.go
+++ b/go/chromite/api/packages.pb.go
@@ -25,6 +25,44 @@
 // proto package needs to be updated.
 const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
 
+type NeedsChromeSourceResponse_Reason int32
+
+const (
+	NeedsChromeSourceResponse_UNSPECIFIED NeedsChromeSourceResponse_Reason = 0
+	// There is no Chrome prebuilt available.
+	NeedsChromeSourceResponse_NO_PREBUILT NeedsChromeSourceResponse_Reason = 1
+	// The builder is compiling from source.
+	NeedsChromeSourceResponse_COMPILE_SOURCE NeedsChromeSourceResponse_Reason = 2
+	// There is a local uprev of Chrome.
+	NeedsChromeSourceResponse_LOCAL_UPREV NeedsChromeSourceResponse_Reason = 3
+	// A follower package lacks prebuilts.
+	NeedsChromeSourceResponse_FOLLOWER_LACKS_PREBUILT NeedsChromeSourceResponse_Reason = 4
+)
+
+var NeedsChromeSourceResponse_Reason_name = map[int32]string{
+	0: "UNSPECIFIED",
+	1: "NO_PREBUILT",
+	2: "COMPILE_SOURCE",
+	3: "LOCAL_UPREV",
+	4: "FOLLOWER_LACKS_PREBUILT",
+}
+
+var NeedsChromeSourceResponse_Reason_value = map[string]int32{
+	"UNSPECIFIED":             0,
+	"NO_PREBUILT":             1,
+	"COMPILE_SOURCE":          2,
+	"LOCAL_UPREV":             3,
+	"FOLLOWER_LACKS_PREBUILT": 4,
+}
+
+func (x NeedsChromeSourceResponse_Reason) String() string {
+	return proto.EnumName(NeedsChromeSourceResponse_Reason_name, int32(x))
+}
+
+func (NeedsChromeSourceResponse_Reason) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_40286986e1d9a416, []int{13, 0}
+}
+
 // This can easily be generalized to a Builds method if necessary, but
 // currently we have no use case for anything but Chrome, and making this
 // specifically for Chrome simplifies the calling code significantly.
@@ -863,6 +901,104 @@
 	return false
 }
 
+type NeedsChromeSourceRequest struct {
+	// The request that will be passed to InstallPackages.
+	InstallRequest       *InstallPackagesRequest `protobuf:"bytes,1,opt,name=install_request,json=installRequest,proto3" json:"install_request,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                `json:"-"`
+	XXX_unrecognized     []byte                  `json:"-"`
+	XXX_sizecache        int32                   `json:"-"`
+}
+
+func (m *NeedsChromeSourceRequest) Reset()         { *m = NeedsChromeSourceRequest{} }
+func (m *NeedsChromeSourceRequest) String() string { return proto.CompactTextString(m) }
+func (*NeedsChromeSourceRequest) ProtoMessage()    {}
+func (*NeedsChromeSourceRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_40286986e1d9a416, []int{12}
+}
+
+func (m *NeedsChromeSourceRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_NeedsChromeSourceRequest.Unmarshal(m, b)
+}
+func (m *NeedsChromeSourceRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_NeedsChromeSourceRequest.Marshal(b, m, deterministic)
+}
+func (m *NeedsChromeSourceRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_NeedsChromeSourceRequest.Merge(m, src)
+}
+func (m *NeedsChromeSourceRequest) XXX_Size() int {
+	return xxx_messageInfo_NeedsChromeSourceRequest.Size(m)
+}
+func (m *NeedsChromeSourceRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_NeedsChromeSourceRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_NeedsChromeSourceRequest proto.InternalMessageInfo
+
+func (m *NeedsChromeSourceRequest) GetInstallRequest() *InstallPackagesRequest {
+	if m != nil {
+		return m.InstallRequest
+	}
+	return nil
+}
+
+type NeedsChromeSourceResponse struct {
+	// Whethere Chrome source is needed.
+	NeedsChromeSource bool `protobuf:"varint,1,opt,name=needs_chrome_source,json=needsChromeSource,proto3" json:"needs_chrome_source,omitempty"`
+	// Reasons for needing Chrome source.
+	Reasons []NeedsChromeSourceResponse_Reason `protobuf:"varint,2,rep,packed,name=reasons,proto3,enum=chromite.api.NeedsChromeSourceResponse_Reason" json:"reasons,omitempty"`
+	// Packages causing the need for source.
+	Packages             []*chromiumos.PackageInfo `protobuf:"bytes,3,rep,name=packages,proto3" json:"packages,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                  `json:"-"`
+	XXX_unrecognized     []byte                    `json:"-"`
+	XXX_sizecache        int32                     `json:"-"`
+}
+
+func (m *NeedsChromeSourceResponse) Reset()         { *m = NeedsChromeSourceResponse{} }
+func (m *NeedsChromeSourceResponse) String() string { return proto.CompactTextString(m) }
+func (*NeedsChromeSourceResponse) ProtoMessage()    {}
+func (*NeedsChromeSourceResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_40286986e1d9a416, []int{13}
+}
+
+func (m *NeedsChromeSourceResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_NeedsChromeSourceResponse.Unmarshal(m, b)
+}
+func (m *NeedsChromeSourceResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_NeedsChromeSourceResponse.Marshal(b, m, deterministic)
+}
+func (m *NeedsChromeSourceResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_NeedsChromeSourceResponse.Merge(m, src)
+}
+func (m *NeedsChromeSourceResponse) XXX_Size() int {
+	return xxx_messageInfo_NeedsChromeSourceResponse.Size(m)
+}
+func (m *NeedsChromeSourceResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_NeedsChromeSourceResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_NeedsChromeSourceResponse proto.InternalMessageInfo
+
+func (m *NeedsChromeSourceResponse) GetNeedsChromeSource() bool {
+	if m != nil {
+		return m.NeedsChromeSource
+	}
+	return false
+}
+
+func (m *NeedsChromeSourceResponse) GetReasons() []NeedsChromeSourceResponse_Reason {
+	if m != nil {
+		return m.Reasons
+	}
+	return nil
+}
+
+func (m *NeedsChromeSourceResponse) GetPackages() []*chromiumos.PackageInfo {
+	if m != nil {
+		return m.Packages
+	}
+	return nil
+}
+
 // The generic version of HasChromePrebuilt.
 type HasPrebuiltRequest struct {
 	// The chroot where the operations will be executed.
@@ -887,7 +1023,7 @@
 func (m *HasPrebuiltRequest) String() string { return proto.CompactTextString(m) }
 func (*HasPrebuiltRequest) ProtoMessage()    {}
 func (*HasPrebuiltRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_40286986e1d9a416, []int{12}
+	return fileDescriptor_40286986e1d9a416, []int{14}
 }
 
 func (m *HasPrebuiltRequest) XXX_Unmarshal(b []byte) error {
@@ -948,7 +1084,7 @@
 func (m *HasPrebuiltResponse) String() string { return proto.CompactTextString(m) }
 func (*HasPrebuiltResponse) ProtoMessage()    {}
 func (*HasPrebuiltResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_40286986e1d9a416, []int{13}
+	return fileDescriptor_40286986e1d9a416, []int{15}
 }
 
 func (m *HasPrebuiltResponse) XXX_Unmarshal(b []byte) error {
@@ -998,7 +1134,7 @@
 func (m *UprevPackagesRequest) String() string { return proto.CompactTextString(m) }
 func (*UprevPackagesRequest) ProtoMessage()    {}
 func (*UprevPackagesRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_40286986e1d9a416, []int{14}
+	return fileDescriptor_40286986e1d9a416, []int{16}
 }
 
 func (m *UprevPackagesRequest) XXX_Unmarshal(b []byte) error {
@@ -1066,7 +1202,7 @@
 func (m *UprevVersionedPackageRequest) String() string { return proto.CompactTextString(m) }
 func (*UprevVersionedPackageRequest) ProtoMessage()    {}
 func (*UprevVersionedPackageRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_40286986e1d9a416, []int{15}
+	return fileDescriptor_40286986e1d9a416, []int{17}
 }
 
 func (m *UprevVersionedPackageRequest) XXX_Unmarshal(b []byte) error {
@@ -1131,7 +1267,7 @@
 func (m *UprevVersionedPackageRequest_GitRef) String() string { return proto.CompactTextString(m) }
 func (*UprevVersionedPackageRequest_GitRef) ProtoMessage()    {}
 func (*UprevVersionedPackageRequest_GitRef) Descriptor() ([]byte, []int) {
-	return fileDescriptor_40286986e1d9a416, []int{15, 0}
+	return fileDescriptor_40286986e1d9a416, []int{17, 0}
 }
 
 func (m *UprevVersionedPackageRequest_GitRef) XXX_Unmarshal(b []byte) error {
@@ -1187,7 +1323,7 @@
 func (m *UprevPackagesResponse) String() string { return proto.CompactTextString(m) }
 func (*UprevPackagesResponse) ProtoMessage()    {}
 func (*UprevPackagesResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_40286986e1d9a416, []int{16}
+	return fileDescriptor_40286986e1d9a416, []int{18}
 }
 
 func (m *UprevPackagesResponse) XXX_Unmarshal(b []byte) error {
@@ -1233,7 +1369,7 @@
 func (m *UprevPackagesResponse_Ebuild) String() string { return proto.CompactTextString(m) }
 func (*UprevPackagesResponse_Ebuild) ProtoMessage()    {}
 func (*UprevPackagesResponse_Ebuild) Descriptor() ([]byte, []int) {
-	return fileDescriptor_40286986e1d9a416, []int{16, 0}
+	return fileDescriptor_40286986e1d9a416, []int{18, 0}
 }
 
 func (m *UprevPackagesResponse_Ebuild) XXX_Unmarshal(b []byte) error {
@@ -1273,7 +1409,7 @@
 func (m *UprevVersionedPackageResponse) String() string { return proto.CompactTextString(m) }
 func (*UprevVersionedPackageResponse) ProtoMessage()    {}
 func (*UprevVersionedPackageResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_40286986e1d9a416, []int{17}
+	return fileDescriptor_40286986e1d9a416, []int{19}
 }
 
 func (m *UprevVersionedPackageResponse) XXX_Unmarshal(b []byte) error {
@@ -1302,6 +1438,7 @@
 }
 
 func init() {
+	proto.RegisterEnum("chromite.api.NeedsChromeSourceResponse_Reason", NeedsChromeSourceResponse_Reason_name, NeedsChromeSourceResponse_Reason_value)
 	proto.RegisterType((*BuildsChromeRequest)(nil), "chromite.api.BuildsChromeRequest")
 	proto.RegisterType((*BuildsChromeResponse)(nil), "chromite.api.BuildsChromeResponse")
 	proto.RegisterType((*GetBestVisibleRequest)(nil), "chromite.api.GetBestVisibleRequest")
@@ -1316,6 +1453,8 @@
 	proto.RegisterType((*GetBuilderMetadataResponse_BuildTargetMetadata)(nil), "chromite.api.GetBuilderMetadataResponse.BuildTargetMetadata")
 	proto.RegisterType((*HasChromePrebuiltRequest)(nil), "chromite.api.HasChromePrebuiltRequest")
 	proto.RegisterType((*HasChromePrebuiltResponse)(nil), "chromite.api.HasChromePrebuiltResponse")
+	proto.RegisterType((*NeedsChromeSourceRequest)(nil), "chromite.api.NeedsChromeSourceRequest")
+	proto.RegisterType((*NeedsChromeSourceResponse)(nil), "chromite.api.NeedsChromeSourceResponse")
 	proto.RegisterType((*HasPrebuiltRequest)(nil), "chromite.api.HasPrebuiltRequest")
 	proto.RegisterType((*HasPrebuiltResponse)(nil), "chromite.api.HasPrebuiltResponse")
 	proto.RegisterType((*UprevPackagesRequest)(nil), "chromite.api.UprevPackagesRequest")
@@ -1329,91 +1468,104 @@
 func init() { proto.RegisterFile("chromite/api/packages.proto", fileDescriptor_40286986e1d9a416) }
 
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+	0x65, 0xe0, 0xce, 0x98, 0xa5, 0x1e, 0x7d, 0x0e, 0xe5, 0xf8, 0xa4, 0x8b, 0x6e, 0xa4, 0x5b, 0xdc,
+	0xd4, 0x70, 0x6e, 0xdc, 0x3c, 0x1b, 0xa4, 0x95, 0x63, 0xa8, 0x24, 0x87, 0x4d, 0x74, 0x2b, 0x25,
+	0x39, 0x6c, 0x1e, 0x36, 0x6e, 0x7f, 0x08, 0x36, 0x88, 0x52, 0x6a, 0x26, 0x44, 0x69, 0xe1, 0xa1,
+	0x93, 0x6b, 0x32, 0x4a, 0xa3, 0x87, 0xcb, 0x63, 0x40, 0xe9, 0x56, 0x1f, 0xdd, 0xf9, 0xf0, 0x30,
+	0xa0, 0xec, 0xdc, 0x1d, 0x77, 0x6a, 0xf0, 0xb7, 0x93, 0x6a, 0x56, 0x92, 0xdb, 0x19, 0xd5, 0x69,
+	0x25, 0xb7, 0x33, 0xba, 0xeb, 0xb1, 0xa0, 0x18, 0x79, 0x59, 0xd0, 0x72, 0x4a, 0x2e, 0xa9, 0x79,
+	0xe5, 0x0c, 0x84, 0xd6, 0xf9, 0x29, 0x5c, 0x92, 0x97, 0x07, 0x99, 0x67, 0xde, 0x28, 0xa5, 0x6f,
+	0x9c, 0x5b, 0x67, 0xe6, 0xdf, 0xbd, 0x37, 0xb2, 0x95, 0x2c, 0xfa, 0x4a, 0x97, 0x9f, 0xe4, 0xb5,
+	0x46, 0xf7, 0xc6, 0xaf, 0xb5, 0xc6, 0xfd, 0xb1, 0xb0, 0x71, 0xcb, 0x46, 0xe5, 0xdd, 0x7b, 0xa3,
+	0x34, 0xe8, 0x7d, 0x2a, 0x99, 0xf5, 0xc7, 0x9f, 0x3d, 0x3a, 0x66, 0x61, 0x39, 0xae, 0x31, 0x7e,
+	0xbc, 0x1a, 0xf9, 0x97, 0x47, 0x9d, 0x36, 0xc7, 0xab, 0xf2, 0x57, 0xde, 0xea, 0x31, 0x5b, 0x8d,
+	0xfe, 0x01, 0x3c, 0xca, 0x4b, 0xf2, 0x83, 0xbf, 0x03, 0x00, 0x00, 0xff, 0xff, 0xc5, 0x21, 0xb9,
+	0xc4, 0x7d, 0x14, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -1430,6 +1582,9 @@
 type PackageServiceClient interface {
 	// Check if the build target has chrome in its depgraph.
 	BuildsChrome(ctx context.Context, in *BuildsChromeRequest, opts ...grpc.CallOption) (*BuildsChromeResponse, error)
+	// Check whether the Chrome source tree is needed.  Does not compile nor
+	// install any packages.
+	NeedsChromeSource(ctx context.Context, in *NeedsChromeSourceRequest, opts ...grpc.CallOption) (*NeedsChromeSourceResponse, error)
 	// Find the best (highest) available version of the requested package.
 	// This must be run after the chroot is set up (for chroot package lookup) or
 	// after the sysroot is created (for build target package lookup).
@@ -1480,6 +1635,15 @@
 	return out, nil
 }
 
+func (c *packageServiceClient) NeedsChromeSource(ctx context.Context, in *NeedsChromeSourceRequest, opts ...grpc.CallOption) (*NeedsChromeSourceResponse, error) {
+	out := new(NeedsChromeSourceResponse)
+	err := c.cc.Invoke(ctx, "/chromite.api.PackageService/NeedsChromeSource", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (c *packageServiceClient) GetBestVisible(ctx context.Context, in *GetBestVisibleRequest, opts ...grpc.CallOption) (*GetBestVisibleResponse, error) {
 	out := new(GetBestVisibleResponse)
 	err := c.cc.Invoke(ctx, "/chromite.api.PackageService/GetBestVisible", in, out, opts...)
@@ -1556,6 +1720,9 @@
 type PackageServiceServer interface {
 	// Check if the build target has chrome in its depgraph.
 	BuildsChrome(context.Context, *BuildsChromeRequest) (*BuildsChromeResponse, error)
+	// Check whether the Chrome source tree is needed.  Does not compile nor
+	// install any packages.
+	NeedsChromeSource(context.Context, *NeedsChromeSourceRequest) (*NeedsChromeSourceResponse, error)
 	// Find the best (highest) available version of the requested package.
 	// This must be run after the chroot is set up (for chroot package lookup) or
 	// after the sysroot is created (for build target package lookup).
@@ -1596,6 +1763,9 @@
 func (*UnimplementedPackageServiceServer) BuildsChrome(ctx context.Context, req *BuildsChromeRequest) (*BuildsChromeResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method BuildsChrome not implemented")
 }
+func (*UnimplementedPackageServiceServer) NeedsChromeSource(ctx context.Context, req *NeedsChromeSourceRequest) (*NeedsChromeSourceResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method NeedsChromeSource not implemented")
+}
 func (*UnimplementedPackageServiceServer) GetBestVisible(ctx context.Context, req *GetBestVisibleRequest) (*GetBestVisibleResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method GetBestVisible not implemented")
 }
@@ -1643,6 +1813,24 @@
 	return interceptor(ctx, in, info, handler)
 }
 
+func _PackageService_NeedsChromeSource_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(NeedsChromeSourceRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(PackageServiceServer).NeedsChromeSource(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/chromite.api.PackageService/NeedsChromeSource",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(PackageServiceServer).NeedsChromeSource(ctx, req.(*NeedsChromeSourceRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 func _PackageService_GetBestVisible_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(GetBestVisibleRequest)
 	if err := dec(in); err != nil {
@@ -1796,6 +1984,10 @@
 			Handler:    _PackageService_BuildsChrome_Handler,
 		},
 		{
+			MethodName: "NeedsChromeSource",
+			Handler:    _PackageService_NeedsChromeSource_Handler,
+		},
+		{
 			MethodName: "GetBestVisible",
 			Handler:    _PackageService_GetBestVisible_Handler,
 		},
diff --git a/src/chromite/api/packages.proto b/src/chromite/api/packages.proto
index 85971b0..048e321 100644
--- a/src/chromite/api/packages.proto
+++ b/src/chromite/api/packages.proto
@@ -5,6 +5,7 @@
 
 import "chromite/api/binhost.proto";
 import "chromite/api/build_api.proto";
+import "chromite/api/sysroot.proto";
 import "chromiumos/common.proto";
 
 
@@ -161,6 +162,32 @@
   bool has_prebuilt = 1;
 }
 
+message NeedsChromeSourceRequest {
+  // The request that will be passed to InstallPackages.
+  InstallPackagesRequest install_request = 1;
+}
+
+message NeedsChromeSourceResponse {
+  // Whethere Chrome source is needed.
+  bool needs_chrome_source = 1;
+  enum Reason {
+    UNSPECIFIED = 0;
+    // There is no Chrome prebuilt available.
+    NO_PREBUILT = 1;
+    // The builder is compiling from source.
+    COMPILE_SOURCE = 2;
+    // There is a local uprev of Chrome.
+    LOCAL_UPREV = 3;
+    // A follower package lacks prebuilts.
+    FOLLOWER_LACKS_PREBUILT = 4;
+  };
+  // Reasons for needing Chrome source.
+  repeated Reason reasons = 2;
+
+  // Packages causing the need for source.
+  repeated chromiumos.PackageInfo packages = 3;
+}
+
 // The generic version of HasChromePrebuilt.
 message HasPrebuiltRequest {
   // The chroot where the operations will be executed.
@@ -259,6 +286,11 @@
   // Check if the build target has chrome in its depgraph.
   rpc BuildsChrome(BuildsChromeRequest) returns (BuildsChromeResponse);
 
+  // Check whether the Chrome source tree is needed.  Does not compile nor
+  // install any packages.
+  rpc NeedsChromeSource(NeedsChromeSourceRequest)
+    returns (NeedsChromeSourceResponse);
+
   // Find the best (highest) available version of the requested package.
   // This must be run after the chroot is set up (for chroot package lookup) or
   // after the sysroot is created (for build target package lookup).