Use Delve v0.12.1 instead of master

vendor/github.com/derekparker/delve/config/config.go

@@ -0,0 +1,134 @@
+package config
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"os/user"
+	"path"
+
+	yaml "gopkg.in/yaml.v2"
+)
+
+const (
+	configDir  string = ".dlv"
+	configFile string = "config.yml"
+)
+
+// Describes a rule for substitution of path to source code file.
+type SubstitutePathRule struct {
+	// Directory path will be substituted if it matches `From`.
+	From string
+	// Path to which substitution is performed.
+	To   string
+}
+
+// Slice of source code path substitution rules.
+type SubstitutePathRules []SubstitutePathRule
+
+// Config defines all configuration options available to be set through the config file.
+type Config struct {
+	// Commands aliases.
+	Aliases        map[string][]string
+	// Source code path substitution rules.
+	SubstitutePath SubstitutePathRules `yaml:"substitute-path"`
+}
+
+// LoadConfig attempts to populate a Config object from the config.yml file.
+func LoadConfig() *Config {
+	err := createConfigPath()
+	if err != nil {
+		fmt.Printf("Could not create config directory: %v.", err)
+		return nil
+	}
+	fullConfigFile, err := GetConfigFilePath(configFile)
+	if err != nil {
+		fmt.Printf("Unable to get config file path: %v.", err)
+		return nil
+	}
+
+	f, err := os.Open(fullConfigFile)
+	if err != nil {
+		createDefaultConfig(fullConfigFile)
+		return nil
+	}
+	defer func() {
+		err := f.Close()
+		if err != nil {
+			fmt.Printf("Closing config file failed: %v.", err)
+		}
+	}()
+
+	data, err := ioutil.ReadAll(f)
+	if err != nil {
+		fmt.Printf("Unable to read config data: %v.", err)
+		return nil
+	}
+
+	var c Config
+	err = yaml.Unmarshal(data, &c)
+	if err != nil {
+		fmt.Printf("Unable to decode config file: %v.", err)
+		return nil
+	}
+
+	return &c
+}
+
+func createDefaultConfig(path string) {
+	f, err := os.Create(path)
+	if err != nil {
+		fmt.Printf("Unable to create config file: %v.", err)
+		return
+	}
+	defer func() {
+		err := f.Close()
+		if err != nil {
+			fmt.Printf("Closing config file failed: %v.", err)
+		}
+	}()
+	err = writeDefaultConfig(f)
+	if err != nil {
+		fmt.Printf("Unable to write default configuration: %v.", err)
+	}
+}
+
+func writeDefaultConfig(f *os.File) error {
+	_, err := f.WriteString(
+		`# Configuration file for the delve debugger.
+
+# This is the default configuration file. Available options are provided, but disabled.
+# Delete the leading hash mark to enable an item.
+
+# Provided aliases will be added to the default aliases for a given command.
+aliases:
+  # command: ["alias1", "alias2"]
+
+# Define sources path substitution rules. Can be used to rewrite a source path stored
+# in program's debug information, if the sources were moved to a different place
+# between compilation and debugging.
+# Note that substitution rules will not be used for paths passed to "break" and "trace"
+# commands.
+substitute-path:
+  # - {from: path, to: path}
+`)
+	return err
+}
+
+// createConfigPath creates the directory structure at which all config files are saved.
+func createConfigPath() error {
+	path, err := GetConfigFilePath("")
+	if err != nil {
+		return err
+	}
+	return os.MkdirAll(path, 0700)
+}
+
+// GetConfigFilePath gets the full path to the given config file name.
+func GetConfigFilePath(file string) (string, error) {
+	usr, err := user.Current()
+	if err != nil {
+		return "", err
+	}
+	return path.Join(usr.HomeDir, configDir, file), nil
+}