Update vendors

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

@@ -0,0 +1,181 @@
+package config
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"os/user"
+	"path"
+
+	"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 `yaml:"aliases"`
+	// Source code path substitution rules.
+	SubstitutePath SubstitutePathRules `yaml:"substitute-path"`
+
+	// MaxStringLen is the maximum string length that the commands print,
+	// locals, args and vars should read (in verbose mode).
+	MaxStringLen *int `yaml:"max-string-len,omitempty"`
+	// MaxArrayValues is the maximum number of array items that the commands
+	// print, locals, args and vars should read (in verbose mode).
+	MaxArrayValues *int `yaml:"max-array-values,omitempty"`
+
+	// If ShowLocationExpr is true whatis will print the DWARF location
+	// expression for its argument.
+	ShowLocationExpr bool `yaml:"show-location-expr"`
+	
+	// Source list line-number color (3/4 bit color codes as defined
+	// here: https://en.wikipedia.org/wiki/ANSI_escape_code#Colors)
+	SourceListLineColor int `yaml:"source-list-line-color"`
+}
+
+// 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 {
+		f, err = createDefaultConfig(fullConfigFile)
+		if err != nil {
+			fmt.Printf("Error creating default config file: %v", err)
+			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 SaveConfig(conf *Config) error {
+	fullConfigFile, err := GetConfigFilePath(configFile)
+	if err != nil {
+		return err
+	}
+
+	out, err := yaml.Marshal(*conf)
+	if err != nil {
+		return err
+	}
+
+	f, err := os.Create(fullConfigFile)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	_, err = f.Write(out)
+	return err
+}
+
+func createDefaultConfig(path string) (*os.File, error) {
+	f, err := os.Create(path)
+	if err != nil {
+		return nil, fmt.Errorf("Unable to create config file: %v.", err)
+	}
+	err = writeDefaultConfig(f)
+	if err != nil {
+		return nil, fmt.Errorf("Unable to write default configuration: %v.", err)
+	}
+	return f, nil
+}
+
+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.
+
+# Uncomment the following line and set your preferred ANSI foreground color
+# for source line numbers in the (list) command (if unset, default is 34,
+# dark blue) See https://en.wikipedia.org/wiki/ANSI_escape_code#3/4_bit
+# source-list-line-color: 34
+
+# 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}
+  
+# Maximum number of elements loaded from an array.
+# max-array-values: 64
+
+# Maximum loaded string length.
+# max-string-len: 64
+
+# Uncomment the following line to make the whatis command also print the DWARF location expression of its argument.
+# show-location-expr: true
+`)
+	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
+}