feat(tvix/build/protos): add some missing fields r/7265

 - directory in which the castore input nodes are mounted
 - working directory for the build command
 - scratch paths
 - network access y/n
 - whether a (static) /bin/sh should be provided

Populate these fields appropriately, and extend the tests in tvix-glue
with a FOD example.

Change-Id: I4f9de1483d6696d74694a09784910c407acb0be0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/10412
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>

1 files changed, 121 insertions, 61 deletions

diff --git a/tvix/build-go/build.pb.go b/tvix/build-go/build.pb.go
index fe996cb4083a..8c65b04b7eff 100644
--- a/tvix/build-go/build.pb.go
+++ b/tvix/build-go/build.pb.go
@@ -64,15 +64,31 @@ type BuildRequest struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
+	// The list of all root nodes that should be visible in STORE_DIR at the time
+	// of the build.
+	// As root nodes are content-addressed, no additional signatures are needed
+	// to substitute / make these available in the build environment.
+	// Inputs are sorted by their names.
+	Inputs []*castore_go.Node `protobuf:"bytes,1,rep,name=inputs,proto3" json:"inputs,omitempty"`
 	// The command (and its args) executed as the build script.
 	// In the case of a Nix derivation, this is usually
 	// ["/path/to/some-bash/bin/bash", "-e", "/path/to/some/builder.sh"].
-	CommandArgs []string `protobuf:"bytes,1,rep,name=command_args,json=commandArgs,proto3" json:"command_args,omitempty"`
-	// The list of outputs the build is expected to produce.
-	// These are basenames inside /nix/store.
+	CommandArgs []string `protobuf:"bytes,2,rep,name=command_args,json=commandArgs,proto3" json:"command_args,omitempty"`
+	// The working dir of the command, relative to the build root.
+	// "build", in the case of Nix.
+	WorkingDir string `protobuf:"bytes,3,opt,name=working_dir,json=workingDir,proto3" json:"working_dir,omitempty"`
+	// A list of "scratch" paths, relative to the build root.
+	// These will be write-able during the build.
+	// [build] in the case of Nix.
+	ScratchPaths []string `protobuf:"bytes,4,rep,name=scratch_paths,json=scratchPaths,proto3" json:"scratch_paths,omitempty"`
+	// The path where the castore input nodes will be located at,
+	// "/nix/store" in case of Nix.
+	StoreDir string `protobuf:"bytes,5,opt,name=store_dir,json=storeDir,proto3" json:"store_dir,omitempty"`
+	// The list of output nodes the build is expected to produce.
+	// These are basenames inside store_dir.
 	// If the path is not produced, the build is considered to have failed.
 	// Outputs are sorted.
-	Outputs []string `protobuf:"bytes,2,rep,name=outputs,proto3" json:"outputs,omitempty"`
+	Outputs []string `protobuf:"bytes,6,rep,name=outputs,proto3" json:"outputs,omitempty"`
 	// The list of environment variables and their values that should be set
 	// inside the build environment.
 	// This includes both environment vars set inside the derivation, as well as
@@ -83,16 +99,10 @@ type BuildRequest struct {
 	// We don't want to bleed these very nix-specific sandbox impl details into
 	// (dumber) builders if we don't have to.
 	// Environment variables are sorted by their keys.
-	EnvironmentVars []*BuildRequest_EnvVar `protobuf:"bytes,3,rep,name=environment_vars,json=environmentVars,proto3" json:"environment_vars,omitempty"`
-	// The list of all root nodes that should be visible in /nix/store at the
-	// time of the build.
-	// As root nodes are content-addressed, no additional signatures are needed
-	// to substitute / make these available in the build environment.
-	// Inputs are sorted by their names.
-	Inputs []*castore_go.Node `protobuf:"bytes,4,rep,name=inputs,proto3" json:"inputs,omitempty"`
+	EnvironmentVars []*BuildRequest_EnvVar `protobuf:"bytes,7,rep,name=environment_vars,json=environmentVars,proto3" json:"environment_vars,omitempty"`
 	// A set of constraints that need to be satisfied on a build host before a
 	// Build can be started.
-	Constraints *BuildRequest_BuildConstraints `protobuf:"bytes,5,opt,name=constraints,proto3" json:"constraints,omitempty"`
+	Constraints *BuildRequest_BuildConstraints `protobuf:"bytes,8,opt,name=constraints,proto3" json:"constraints,omitempty"`
 }
 
 func (x *BuildRequest) Reset() {
@@ -127,6 +137,13 @@ func (*BuildRequest) Descriptor() ([]byte, []int) {
 	return file_tvix_build_protos_build_proto_rawDescGZIP(), []int{0}
 }
 
+func (x *BuildRequest) GetInputs() []*castore_go.Node {
+	if x != nil {
+		return x.Inputs
+	}
+	return nil
+}
+
 func (x *BuildRequest) GetCommandArgs() []string {
 	if x != nil {
 		return x.CommandArgs
@@ -134,23 +151,37 @@ func (x *BuildRequest) GetCommandArgs() []string {
 	return nil
 }
 
-func (x *BuildRequest) GetOutputs() []string {
+func (x *BuildRequest) GetWorkingDir() string {
 	if x != nil {
-		return x.Outputs
+		return x.WorkingDir
+	}
+	return ""
+}
+
+func (x *BuildRequest) GetScratchPaths() []string {
+	if x != nil {
+		return x.ScratchPaths
 	}
 	return nil
 }
 
-func (x *BuildRequest) GetEnvironmentVars() []*BuildRequest_EnvVar {
+func (x *BuildRequest) GetStoreDir() string {
 	if x != nil {
-		return x.EnvironmentVars
+		return x.StoreDir
+	}
+	return ""
+}
+
+func (x *BuildRequest) GetOutputs() []string {
+	if x != nil {
+		return x.Outputs
 	}
 	return nil
 }
 
-func (x *BuildRequest) GetInputs() []*castore_go.Node {
+func (x *BuildRequest) GetEnvironmentVars() []*BuildRequest_EnvVar {
 	if x != nil {
-		return x.Inputs
+		return x.EnvironmentVars
 	}
 	return nil
 }
@@ -291,9 +322,13 @@ type BuildRequest_BuildConstraints struct {
 	// The amount of memory required to be available for the build, in bytes.
 	MinMemory uint64 `protobuf:"varint,2,opt,name=min_memory,json=minMemory,proto3" json:"min_memory,omitempty"`
 	// A list of (absolute) paths that need to be available in the build
-	// environment.
-	// TBD, This is probably things like /dev/kvm, but no nix store paths.
+	// environment, like `/dev/kvm`.
+	// This is distinct from the castore nodes in inputs.
 	AvailableRoPaths []string `protobuf:"bytes,3,rep,name=available_ro_paths,json=availableRoPaths,proto3" json:"available_ro_paths,omitempty"`
+	// Whether the build should be able to access the network,
+	NetworkAccess bool `protobuf:"varint,4,opt,name=network_access,json=networkAccess,proto3" json:"network_access,omitempty"`
+	// Whether to provide a /bin/sh inside the build environment, usually a static bash.
+	ProvideBinSh bool `protobuf:"varint,5,opt,name=provide_bin_sh,json=provideBinSh,proto3" json:"provide_bin_sh,omitempty"`
 }
 
 func (x *BuildRequest_BuildConstraints) Reset() {
@@ -349,6 +384,20 @@ func (x *BuildRequest_BuildConstraints) GetAvailableRoPaths() []string {
 	return nil
 }
 
+func (x *BuildRequest_BuildConstraints) GetNetworkAccess() bool {
+	if x != nil {
+		return x.NetworkAccess
+	}
+	return false
+}
+
+func (x *BuildRequest_BuildConstraints) GetProvideBinSh() bool {
+	if x != nil {
+		return x.ProvideBinSh
+	}
+	return false
+}
+
 var File_tvix_build_protos_build_proto protoreflect.FileDescriptor
 
 var file_tvix_build_protos_build_proto_rawDesc = []byte{
@@ -357,46 +406,57 @@ var file_tvix_build_protos_build_proto_rawDesc = []byte{
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 }
 
 var (
@@ -420,8 +480,8 @@ var file_tvix_build_protos_build_proto_goTypes = []interface{}{
 	(*castore_go.Node)(nil),               // 4: tvix.castore.v1.Node
 }
 var file_tvix_build_protos_build_proto_depIdxs = []int32{
-	2, // 0: tvix.build.v1.BuildRequest.environment_vars:type_name -> tvix.build.v1.BuildRequest.EnvVar
-	4, // 1: tvix.build.v1.BuildRequest.inputs:type_name -> tvix.castore.v1.Node
+	4, // 0: tvix.build.v1.BuildRequest.inputs:type_name -> tvix.castore.v1.Node
+	2, // 1: tvix.build.v1.BuildRequest.environment_vars:type_name -> tvix.build.v1.BuildRequest.EnvVar
 	3, // 2: tvix.build.v1.BuildRequest.constraints:type_name -> tvix.build.v1.BuildRequest.BuildConstraints
 	0, // 3: tvix.build.v1.Build.build_request:type_name -> tvix.build.v1.BuildRequest
 	4, // 4: tvix.build.v1.Build.outputs:type_name -> tvix.castore.v1.Node