feat(core): initial version of the client library (#61)

core/Makefile

@@ -3,13 +3,18 @@ GOPATH ?= $(HOME)/go
 BIN = $(GOPATH)/bin/berty
 CODE_PATHS = $(filter-out node_modules/,$(wildcard */))
 PROTOS = $(call rwildcard, $(CODE_PATHS), *.proto)
-GENERATED_FILES = $(patsubst %.proto,%.pb.go,$(PROTOS))
+SERVICE_PROTOS = $(call rwildcard, api, *.proto)
+GENERATED_FILES = $(patsubst %.proto,%.pb.go,$(PROTOS)) client/berty.node.service.gen.go $(rwildcard $(CODE_PATHS),*.gen.go)
 PROTOC_OPTS = --proto_path=../vendor:../vendor/github.com/gogo/protobuf:.
 CGO_LDFLAGS ?= -L/usr/local/opt/openssl/lib
 CGO_CPPFLAGS ?= -I/usr/local/opt/openssl/include
 BUILD_ENV ?= CGO_LDFLAGS="$(CGO_LDFLAGS)" CGO_CPPFLAGS="$(CGO_CPPFLAGS)"
 RUN_DAEMON_OPTS ?= --log-level=debug
 
+##
+## phonies
+##
+
 .PHONY: all
 all: run
 
@@ -27,9 +32,6 @@ $(BIN): $(GENERATED_FILES)
 test: generate
 	$(BUILD_ENV) go test -test.timeout 30s -v ./...
 
-%.pb.go: %.proto
-	protoc $(PROTOC_OPTS) --gofast_out=plugins=grpc:"$(GOPATH)/src" "$(dir $<)"/*.proto
-
 .PHONY: clean
 clean:
 	rm -f $(GENERATED_FILES) $(BIN)
@@ -41,3 +43,16 @@ generate: $(GENERATED_FILES)
 _ci_prepare:
 	@# touching files to avoid regenerating files based on modification date
 	touch $(GENERATED_FILES)
+
+##
+## file-based rules
+##
+
+%.pb.go: %.proto
+	protoc $(PROTOC_OPTS) --gofast_out=plugins=grpc:"$(GOPATH)/src" "$(dir $<)"/*.proto
+
+client/berty.node.service.gen.go: $(PROTOS)
+	for protodir in $(dir $(SERVICE_PROTOS)); do \
+	  protoc $(PROTOC_OPTS) --gotemplate_out=debug=false,all=false,single-package-mode=true,template_dir=./client:./client $$protodir/*.proto; \
+	done
+	goimports -w ./client/

core/api/node/service.proto

@@ -3,7 +3,7 @@ syntax = "proto3";
 package berty.node;
 
 import "api/p2p/event.proto";
-import "api/entity/contact.proto";
+import "entity/contact.proto";
 
 option go_package = "github.com/berty/berty/core/api/node";
 

core/api/p2p/kind.proto

@@ -2,7 +2,7 @@ syntax = "proto3";
 
 package berty.p2p;
 
-import "api/entity/contact.proto";
+import "entity/contact.proto";
 import "gogoproto/gogo.proto";
 
 option go_package = "github.com/berty/berty/core/api/p2p";

core/client/client.go

@@ -0,0 +1,11 @@
+package client
+
+import "google.golang.org/grpc"
+
+type Client struct {
+	conn *grpc.ClientConn
+}
+
+func New(conn *grpc.ClientConn) *Client {
+	return &Client{conn: conn}
+}

core/client/{{.File.Package}}.{{.Service.Name|lower}}.gen.go.tmpl

@@ -0,0 +1,18 @@
+// this file was generated by protoc-gen-gotemplate
+
+package client
+
+{{- $file := .File}}
+
+import (
+        "github.com/berty/berty/core/{{.File.Name|dir}}"
+)
+
+{{- range $svc := .File.Service}}
+{{- if eq ($svc.Name | lower) ($.Service.Name | lower)}}
+  // {{$svc.Name}} returns the native gRPC client
+  func (c *Client) {{$file.Package|splitList "."|last|title}}() {{$.File.Package|splitList "."|last}}.{{$svc.Name}}Client {
+        return {{$.File.Package|splitList "."|last}}.New{{$svc.Name}}Client(c.conn)
+  }
+
+{{end}}{{end}}

core/api/entity/contact.proto → core/entity/contact.proto

@@ -2,7 +2,7 @@ syntax = "proto3";
 
 package berty.entity;
 
-option go_package = "github.com/berty/berty/core/api/entity";
+option go_package = "github.com/berty/berty/core/entity";
 
 import "gogoproto/gogo.proto";
 import "google/protobuf/timestamp.proto";

core/node/nodeapi.go

@@ -6,8 +6,8 @@ import (
 
 	"google.golang.org/grpc"
 
-	"github.com/berty/berty/core/api/entity"
 	"github.com/berty/berty/core/api/node"
+	"github.com/berty/berty/core/entity"
 )
 
 // WithNodeGrpcServer registers the Node as a 'berty.node' protobuf server implementation

core/sql/gorm.go

@@ -6,7 +6,7 @@ import (
 	"github.com/go-gormigrate/gormigrate"
 	"github.com/jinzhu/gorm"
 
-	"github.com/berty/berty/core/api/entity"
+	"github.com/berty/berty/core/entity"
 )
 
 // Init configures an active gorm connection