132 lines
3.6 KiB
Go
132 lines
3.6 KiB
Go
// Copyright © 2019 Peter Kurfer
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cmd
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import (
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"fmt"
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"os"
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"path/filepath"
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"github.com/fsnotify/fsnotify"
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"github.com/baez90/goveal/internal/app/rendering"
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"github.com/mitchellh/go-homedir"
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log "github.com/sirupsen/logrus"
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"github.com/spf13/cobra"
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"github.com/spf13/viper"
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)
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var (
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cfgFile string
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workingDir string
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rootCmd = &cobra.Command{
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Use: "goveal",
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Short: "goveal is a small reveal.js server",
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Long: `goveal is a single static binary to host your reveal.js based markdown presentation.
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It is running a small web server that loads your markdown file, renders a complete HTML page and delivers it including all the reveal.js assets.
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It is not required to restart the server when you edit the markdown - a simple reload of the page is doing all the required magic.`,
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}
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params rendering.RevealParams
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)
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// Execute adds all child commands to the root command and sets flags appropriately.
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// This is called by main.main(). It only needs to happen once to the rootCmd.
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func Execute() {
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if err := rootCmd.Execute(); err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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}
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func init() {
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cobra.OnInitialize(initLogging)
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cobra.OnInitialize(initConfig)
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var err error
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workingDir, err = os.Getwd()
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if err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.go-reveal-slides.yaml)")
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rootCmd.PersistentFlags().StringVar(&workingDir, "working-dir", workingDir, "working directory to use")
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}
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func initLogging() {
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log.SetFormatter(&log.TextFormatter{
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ForceColors: true,
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})
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}
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// initConfig reads in config file and ENV variables if set.
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func initConfig() {
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var err error
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if workingDir, err = filepath.Abs(workingDir); err != nil {
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log.Warnf("Failed to determine absolute path for working dir %s: %v", workingDir, err)
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return
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}
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var cwd string
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if cwd, err = os.Getwd(); err != nil {
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log.Warnf("Failed to determine current working directory")
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return
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}
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if cwd != workingDir {
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if err = os.Chdir(workingDir); err != nil {
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log.Warnf("Failed to change working directory to %s", workingDir)
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}
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}
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if cfgFile != "" {
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// Use config file from the flag.
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viper.SetConfigFile(cfgFile)
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} else {
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// Find home directory.
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home, err := homedir.Dir()
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if err != nil {
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log.Infof("Failed to determine home directory: %v", err)
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} else {
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viper.AddConfigPath(home)
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}
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viper.AddConfigPath(workingDir)
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viper.SetConfigName("goveal")
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viper.SetConfigType("yaml")
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}
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viper.AutomaticEnv() // read in environment variables that match
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// If a config file is found, read it in.
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if err := viper.ReadInConfig(); err == nil {
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log.Info("Using config file:", viper.ConfigFileUsed())
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log.Info("Starting to watch config file...")
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viper.WatchConfig()
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viper.OnConfigChange(func(in fsnotify.Event) {
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log.Info("Noticed configuration change...")
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if err := params.Load(); err != nil {
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log.Warnf("Failed to load config: %v", err)
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}
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})
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}
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params.WorkingDirectory = workingDir
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if err := params.Load(); err != nil {
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log.Warnf("Failed to load config: %v", err)
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}
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}
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