feat(config-init): platform-specific pathing

Update `--init` subcommand to rely upon the same platform-detection
intelligence that was previously implemented by the "installer".

The installer and `--init` should now produce identical config files.

cmd/cheat/cmd_init.go

@@ -2,9 +2,56 @@ package main
 
 import (
 	"fmt"
+	"os"
+	"path"
+	"runtime"
+	"strings"
+
+	"github.com/mitchellh/go-homedir"
+
+	"github.com/cheat/cheat/internal/config"
 )
 
 // cmdInit displays an example config file.
 func cmdInit() {
-	fmt.Println(configs())
+
+	// get the user's home directory
+	home, err := homedir.Dir()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "failed to get user home directory: %v\n", err)
+		os.Exit(1)
+	}
+
+	// read the envvars into a map of strings
+	envvars := map[string]string{}
+	for _, e := range os.Environ() {
+		pair := strings.SplitN(e, "=", 2)
+		envvars[pair[0]] = pair[1]
+	}
+
+	// load the config template
+	configs := configs()
+
+	// identify the os-specifc paths at which configs may be located
+	confpaths, err := config.Paths(runtime.GOOS, home, envvars)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "failed to read config paths: %v\n", err)
+		os.Exit(1)
+	}
+
+	// determine the appropriate paths for config data and (optional) community
+	// cheatsheets based on the user's platform
+	confpath := confpaths[0]
+	confdir := path.Dir(confpath)
+
+	// create paths for community and personal cheatsheets
+	community := path.Join(confdir, "/cheatsheets/community")
+	personal := path.Join(confdir, "/cheatsheets/personal")
+
+	// template the above paths into the default configs
+	configs = strings.Replace(configs, "COMMUNITY_PATH", community, -1)
+	configs = strings.Replace(configs, "PERSONAL_PATH", personal, -1)
+
+	// output the templated configs
+	fmt.Println(configs)
 }

cmd/cheat/main.go

@@ -49,7 +49,7 @@ func main() {
 		envvars[pair[0]] = pair[1]
 	}
 
-	// load the os-specifc paths at which the config file may be located
+	// identify the os-specifc paths at which configs may be located
 	confpaths, err := config.Paths(runtime.GOOS, home, envvars)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "failed to load config: %v\n", err)