Test case for generateOutput

This patch updates the generateOutput function to use an external C parser
for dot parsing. It includes the addition of CGO and a dedicated test case
for the parser itself, which runs generateOutput and parses the resulting
dot file.

Signed-off-by: Alessandro Carminati <alessandro.carminati@gmail.com>

Author: alessandrocarminati

Makefile

@@ -1,17 +1,11 @@
 all:	nav.go
-	go build
-
-aarch64: nav.go
-	GOARCH="arm64" GOOS="linux" go build
-
-amd64: nav.go
-	GOARCH="amd64" GOOS="linux" go build
+	go build -ldflags="-r ."
 
 upx:	nav
 	upx nav
 
 test:
-	go test -cover
+	go test -cover -v
 	go test ./config -v -cover
 
 code/check:

config/config.go

@@ -17,16 +17,17 @@ type Config struct {
 }
 
 type ConfValues struct {
-	Symbol         string    `json:"symbol"`
-	Type           string    `json:"output_type"`
-	DBDriver       string    `json:"db_driver"`
-	DBDSN          string    `json:"DBDSN"`
-	ExcludedBefore []string  `json:"excluded_before"`
-	ExcludedAfter  []string  `json:"excluded_after"`
-	TargetSubsys   []string  `json:"target_subsys"`
-	MaxDepth       int       `json:"max_depth"`
-	Mode           c.OutMode `json:"mode"`
-	DBInstance     int       `json:"db_instance"`
+	Symbol         string     `json:"symbol"`
+	Type           string     `json:"output_type"`
+	DBDriver       string     `json:"db_driver"`
+	DBDSN          string     `json:"DBDSN"`
+	ExcludedBefore []string   `json:"excluded_before"`
+	ExcludedAfter  []string   `json:"excluded_after"`
+	TargetSubsys   []string   `json:"target_subsys"`
+	MaxDepth       int        `json:"max_depth"`
+	Mode           c.OutMode  `json:"mode"`
+	Graphviz       c.OutIMode `json:"out_type"`
+	DBInstance     int        `json:"db_instance"`
 }
 
 // New creates a new Config instance and returns a pointer to it.

constants/const.go

@@ -6,6 +6,16 @@ const (
 )
 
 type OutMode int64
+type OutIMode int64
+
+const (
+	_ OutIMode = iota
+	OText
+	OPNG
+	OJPG
+	OSVG
+	OutIModeLast
+)
 
 // Const values for configuration mode field.
 const (