Change cmdline into git hash of the project

cmd/hercules/main.go

@@ -229,7 +229,7 @@ func printResults(
 	results map[hercules.PipelineItem]interface{}) {
 	fmt.Println("hercules:")
 	fmt.Println("  version: 3")
-	fmt.Println("  cmdline:", strings.Join(os.Args, " "))
+	fmt.Println("  hash:", hercules.GIT_HASH)
 	fmt.Println("  repository:", uri)
 	fmt.Println("  begin_unix_time:", begin)
 	fmt.Println("  end_unix_time:", end)
@@ -251,7 +251,7 @@ func protobufResults(
 
   header := pb.Metadata{
 	  Version: 1,
-	  Cmdline: strings.Join(os.Args, " "),
+	  Hash: hercules.GIT_HASH,
 	  Repository: uri,
     BeginUnixTime: begin,
 	  EndUnixTime: end,

pb/pb.pb.go

@@ -41,8 +41,8 @@ const _ = proto.GoGoProtoPackageIsVersion2 // please upgrade the proto package
 type Metadata struct {
 	// this format is versioned
 	Version int32 `protobuf:"varint,1,opt,name=version,proto3" json:"version,omitempty"`
-	// complete command line used to write this message
-	Cmdline string `protobuf:"bytes,2,opt,name=cmdline,proto3" json:"cmdline,omitempty"`
+	// git hash of the revision from which Hercules is built
+	Hash string `protobuf:"bytes,2,opt,name=hash,proto3" json:"hash,omitempty"`
 	// repository's name
 	Repository string `protobuf:"bytes,3,opt,name=repository,proto3" json:"repository,omitempty"`
 	// timestamp of the first analysed commit
@@ -65,9 +65,9 @@ func (m *Metadata) GetVersion() int32 {
 	return 0
 }
 
-func (m *Metadata) GetCmdline() string {
+func (m *Metadata) GetHash() string {
 	if m != nil {
-		return m.Cmdline
+		return m.Hash
 	}
 	return ""
 }
@@ -468,56 +468,56 @@ func init() {
 func init() { proto.RegisterFile("pb/pb.proto", fileDescriptorPb) }
 
 var fileDescriptorPb = []byte{
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+	// 805 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x55, 0x4d, 0x8f, 0xdb, 0x36,
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+	0xe0, 0xb9, 0x06, 0x00, 0x00,
 }

pb/pb.proto

@@ -3,8 +3,8 @@ syntax = "proto3";
 message Metadata {
     // this format is versioned
     int32 version = 1;
-    // complete command line used to write this message
-    string cmdline = 2;
+    // git hash of the revision from which Hercules is built
+    string hash = 2;
     // repository's name
     string repository = 3;
     // timestamp of the first analysed commit

pipeline.go

@@ -217,14 +217,14 @@ type Pipeline struct {
 	// second is the total number of commits.
 	OnProgress func(int, int)
 
-	// repository points to the analysed Git repository struct from go-git.
+	// Repository points to the analysed Git repository struct from go-git.
 	repository *git.Repository
 
-	// items are the registered building blocks in the pipeline. The order defines the
+	// Items are the registered building blocks in the pipeline. The order defines the
 	// execution sequence.
 	items []PipelineItem
 
-	// the collection of parameters to create items.
+	// The collection of parameters to create items.
 	facts map[string]interface{}
 
 	// Feature flags which enable the corresponding items.

version.go

@@ -0,0 +1,3 @@
+package hercules
+
+var GIT_HASH = "<unknown>"