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options.go
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options.go
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// SPDX-License-Identifier: BSD-3-Clause
// Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
// Licensed under the BSD-3-Clause License (the "License").
// You may not use this file except in compliance with the License.
package cli
import (
"fmt"
"net/http"
"os"
"path/filepath"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"kraftkit.sh/cmdfactory"
"kraftkit.sh/config"
"kraftkit.sh/iostreams"
"kraftkit.sh/log"
"kraftkit.sh/packmanager"
"kraftkit.sh/plugins"
"kraftkit.sh/internal/httpclient"
)
type CliOptions struct {
IOStreams *iostreams.IOStreams
Logger *logrus.Logger
ConfigManager *config.ConfigManager[config.KraftKit]
PackageManager packmanager.PackageManager
PluginManager *plugins.PluginManager
HTTPClient *http.Client
}
type CliOption func(*CliOptions) error
// WithDefaultLogger sets up the built in logger based on provided conifg found
// from the ConfigManager.
func WithDefaultLogger() CliOption {
return func(copts *CliOptions) error {
if copts.Logger != nil {
return nil
}
// Configure the logger based on parameters set by in KraftKit's
// configuration
if copts.ConfigManager == nil {
copts.Logger = log.L
return nil
}
// Set up a default logger based on the internal TextFormatter
logger := logrus.New()
switch log.LoggerTypeFromString(copts.ConfigManager.Config.Log.Type) {
case log.QUIET:
formatter := new(logrus.TextFormatter)
logger.Formatter = formatter
case log.BASIC:
formatter := new(log.TextFormatter)
formatter.FullTimestamp = true
formatter.DisableTimestamp = true
if copts.ConfigManager.Config.Log.Timestamps {
formatter.DisableTimestamp = false
} else {
formatter.TimestampFormat = ">"
}
logger.Formatter = formatter
case log.FANCY:
formatter := new(log.TextFormatter)
formatter.FullTimestamp = true
formatter.DisableTimestamp = true
if copts.ConfigManager.Config.Log.Timestamps {
formatter.DisableTimestamp = false
} else {
formatter.TimestampFormat = ">"
}
logger.Formatter = formatter
case log.JSON:
formatter := new(logrus.JSONFormatter)
formatter.DisableTimestamp = true
if copts.ConfigManager.Config.Log.Timestamps {
formatter.DisableTimestamp = false
}
logger.Formatter = formatter
}
level, ok := log.Levels()[copts.ConfigManager.Config.Log.Level]
if !ok {
logger.Level = logrus.InfoLevel
} else {
logger.Level = level
}
if copts.IOStreams != nil {
logger.SetOutput(copts.IOStreams.Out)
}
// Save the logger
copts.Logger = logger
return nil
}
}
// WithDefaultConfigManager instantiates a configuration manager based on
// default options.
func WithDefaultConfigManager(cmd *cobra.Command) CliOption {
return func(copts *CliOptions) error {
cfg, err := config.NewDefaultKraftKitConfig()
if err != nil {
return err
}
// Attribute all configuration flags and command-line argument values
configDir := config.FetchConfigDirFromArgs(os.Args[1:])
// Did the user specify a non-standard config directory? The following
// check is possible thanks to the attribution of flags to the config file.
// If a flag specifies changing the config directory, we must
// re-instantiate the ConfigManager with the configuration from that
// directory.
var cfgm *config.ConfigManager[config.KraftKit]
if configDir != "" && configDir != config.ConfigDir() {
cfgm, err = config.NewConfigManager(
cfg,
config.WithFile[config.KraftKit](filepath.Join(configDir, "config.yaml"), true),
)
if err != nil {
return err
}
} else {
cfgm, err = config.NewConfigManager(
cfg,
config.WithFile[config.KraftKit](config.DefaultConfigFile(), true),
)
if err != nil {
return err
}
}
if err := cmdfactory.AttributeFlags(cmd, cfg, os.Args[1:]...); err != nil {
return err
}
if err := cmd.ParseFlags(os.Args[1:]); err == nil {
cmd.DisableFlagParsing = true
}
copts.ConfigManager = cfgm
return nil
}
}
// WithDefaultIOStreams instantiates ta new IO streams using environmental
// variables and host-provided configuration.
func WithDefaultIOStreams() CliOption {
return func(copts *CliOptions) error {
if copts.IOStreams != nil {
return nil
}
io := iostreams.System()
if copts.ConfigManager != nil {
if copts.ConfigManager.Config.NoPrompt {
io.SetNeverPrompt(true)
}
if pager := copts.ConfigManager.Config.Pager; pager != "" {
io.SetPager(pager)
}
}
// Pager precedence
// 1. KRAFTKIT_PAGER
// 2. pager from config
// 3. PAGER
if kkPager, kkPagerExists := os.LookupEnv("KRAFTKIT_PAGER"); kkPagerExists {
io.SetPager(kkPager)
}
copts.IOStreams = io
return nil
}
}
// WithHTTPClient sets a previously instantiated http.Client to be used within
// the command.
func WithHTTPClient(httpClient *http.Client) CliOption {
return func(copts *CliOptions) error {
copts.HTTPClient = httpClient
return nil
}
}
// WithDefaultHTTPClient initializes a HTTP client using host-provided
// configuration.
func WithDefaultHTTPClient() CliOption {
return func(copts *CliOptions) error {
if copts.HTTPClient != nil {
return nil
}
if copts.ConfigManager == nil {
return fmt.Errorf("cannot access config manager")
}
if copts.IOStreams == nil {
return fmt.Errorf("cannot access IO streams")
}
httpClient, err := httpclient.NewHTTPClient(
copts.IOStreams,
copts.ConfigManager.Config.HTTPUnixSocket,
)
if err != nil {
return err
}
copts.HTTPClient = httpClient
return nil
}
}
// WithDefaultPluginManager returns an initialized plugin manager using the
// host-provided configuration plugin path.
func WithDefaultPluginManager() CliOption {
return func(copts *CliOptions) error {
if copts.PluginManager != nil {
return nil
}
if copts.ConfigManager == nil {
return fmt.Errorf("cannot access config manager")
}
copts.PluginManager = plugins.NewPluginManager(copts.ConfigManager.Config.Paths.Plugins, nil)
return nil
}
}