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package cmd
import (
"fmt"
"io/ioutil"
"os"
"path"
"strings"
"github.com/mitchellh/go-homedir"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"github.com/spf13/viper"
"github.com/wagoodman/dive/filetree"
"github.com/wagoodman/dive/utils"
)
var cfgFile string
var exportFile string
var ciConfigFile string
// rootCmd represents the base command when called without any subcommands
var rootCmd = &cobra.Command{
Use: "dive [IMAGE]",
Short: "Docker Image Visualizer & Explorer",
Long: `This tool provides a way to discover and explore the contents of a docker image. Additionally the tool estimates
the amount of wasted space and identifies the offending files from the image.`,
Args: cobra.MaximumNArgs(1),
Run: doAnalyzeCmd,
}
// Execute adds all child commands to the root command and sets flags appropriately.
func Execute() {
if err := rootCmd.Execute(); err != nil {
fmt.Println(err)
utils.Exit(1)
}
utils.Cleanup()
}
func init() {
cobra.OnInitialize(initConfig)
rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.dive.yaml, ~/.config/dive/*.yaml, or $XDG_CONFIG_HOME/dive.yaml)")
rootCmd.PersistentFlags().BoolP("version", "v", false, "display version number")
rootCmd.Flags().StringVarP(&exportFile, "json", "j", "", "Skip the interactive TUI and write the layer analysis statistics to a given file.")
rootCmd.Flags().StringVar(&ciConfigFile, "ci-config", ".dive-ci", "If CI=true in the environment, use the given yaml to drive validation rules.")
}
// initConfig reads in config file and ENV variables if set.
func initConfig() {
filepathToCfg := getCfgFile(cfgFile)
viper.SetConfigFile(filepathToCfg)
viper.SetDefault("log.level", log.InfoLevel.String())
viper.SetDefault("log.path", "./dive.log")
viper.SetDefault("log.enabled", true)
// keybindings: status view / global
viper.SetDefault("keybinding.quit", "ctrl+c")
viper.SetDefault("keybinding.toggle-view", "tab")
viper.SetDefault("keybinding.filter-files", "ctrl+f, ctrl+slash")
// keybindings: layer view
viper.SetDefault("keybinding.compare-all", "ctrl+a")
viper.SetDefault("keybinding.compare-layer", "ctrl+l")
// keybindings: filetree view
viper.SetDefault("keybinding.toggle-collapse-dir", "space")
viper.SetDefault("keybinding.toggle-collapse-all-dir", "ctrl+space")
viper.SetDefault("keybinding.toggle-filetree-attributes", "ctrl+b")
viper.SetDefault("keybinding.toggle-added-files", "ctrl+a")
viper.SetDefault("keybinding.toggle-removed-files", "ctrl+r")
viper.SetDefault("keybinding.toggle-modified-files", "ctrl+m")
viper.SetDefault("keybinding.toggle-unchanged-files", "ctrl+u")
viper.SetDefault("keybinding.page-up", "pgup")
viper.SetDefault("keybinding.page-down", "pgdn")
viper.SetDefault("diff.hide", "")
viper.SetDefault("layer.show-aggregated-changes", false)
viper.SetDefault("filetree.collapse-dir", false)
viper.SetDefault("filetree.pane-width", 0.5)
viper.SetDefault("filetree.show-attributes", true)
viper.AutomaticEnv() // read in environment variables that match
// If a config file is found, read it in.
if err := viper.ReadInConfig(); err == nil {
fmt.Println("Using config file:", viper.ConfigFileUsed())
}
// set global defaults (for performance)
filetree.GlobalFileTreeCollapse = viper.GetBool("filetree.collapse-dir")
}
// initLogging sets up the logging object with a formatter and location
func initLogging() {
var logFileObj *os.File
var err error
if viper.GetBool("log.enabled") {
logFileObj, err = os.OpenFile(viper.GetString("log.path"), os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0644)
} else {
log.SetOutput(ioutil.Discard)
}
if err != nil {
fmt.Fprintln(os.Stderr, err)
}
Formatter := new(log.TextFormatter)
Formatter.DisableTimestamp = true
log.SetFormatter(Formatter)
level, err := log.ParseLevel(viper.GetString("log.level"))
if err != nil {
fmt.Fprintln(os.Stderr, err)
}
log.SetLevel(level)
log.SetOutput(logFileObj)
log.Debug("Starting Dive...")
}
// getCfgFile checks for config file in paths from xdg specs
// and in $HOME/.config/dive/ directory
// defaults to $HOME/.dive.yaml
func getCfgFile(fromFlag string) string {
if fromFlag != "" {
return fromFlag
}
home, err := homedir.Dir()
if err != nil {
fmt.Println(err)
utils.Exit(0)
}
xdgHome := os.Getenv("XDG_CONFIG_HOME")
xdgDirs := os.Getenv("XDG_CONFIG_DIRS")
xdgPaths := append([]string{xdgHome}, strings.Split(xdgDirs, ":")...)
allDirs := append(xdgPaths, path.Join(home, ".config"))
for _, val := range allDirs {
file := findInPath(val)
if len(file) > 0 {
return file
}
}
return path.Join(home, ".dive.yaml")
}
// findInPath returns first "*.yaml" file in path's subdirectory "dive"
// if not found returns empty string
func findInPath(pathTo string) string {
directory := path.Join(pathTo, "dive")
files, err := ioutil.ReadDir(directory)
if err != nil {
return ""
}
for _, file := range files {
filename := file.Name()
if path.Ext(filename) == ".yaml" {
return path.Join(directory, filename)
}
}
return ""
}
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