wip(installer): stub experimental "installer"

Stubs out an experimental "installer" that will help new users to
quickly configure `cheat`.

cmd/cheat/main.go

@@ -5,13 +5,16 @@ package main
 import (
 	"fmt"
 	"os"
+	"path"
 	"runtime"
 	"strings"
 
 	"github.com/docopt/docopt-go"
+	"github.com/mitchellh/go-homedir"
 
 	"github.com/cheat/cheat/internal/cheatpath"
 	"github.com/cheat/cheat/internal/config"
+	"github.com/cheat/cheat/internal/installer"
 )
 
 const version = "3.6.0"
@@ -50,6 +53,64 @@ func main() {
 	confpath, err := config.Path(confpaths)
 	if err != nil {
 
+		// prompt the user to create a config file
+		yes, err := installer.Prompt(
+			"A config file was not found. Would you like to create one now? [Y/n]",
+			true,
+		)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "failed to create config: %v\n", err)
+			os.Exit(1)
+		}
+
+		// exit early on a negative answer
+		if !yes {
+			os.Exit(0)
+		}
+
+		// prompt the user to create a config file
+		yes, err = installer.Prompt(
+			"Would you like to download the community cheatsheets? [Y/n]",
+			true,
+		)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "failed to create config: %v\n", err)
+			os.Exit(1)
+		}
+
+		// clone the community cheatsheets if so instructed
+		if yes {
+
+			// get the user's home directory
+			home, err := homedir.Dir()
+			if err != nil {
+				fmt.Fprintf(
+					os.Stderr,
+					"failed to create config: failed to get user home directory: %v\n",
+					err,
+				)
+				os.Exit(1)
+			}
+
+			// clone the community cheatsheets
+			community := path.Join(home, ".config/cheat/cheatsheets/community")
+			if err := installer.Clone(community); err != nil {
+				fmt.Fprintf(os.Stderr, "failed to create config: %v\n", err)
+				os.Exit(1)
+			}
+
+			// create a directory for personal cheatsheets too
+			personal := path.Join(home, ".config/cheat/cheatsheets/personal")
+			if err := os.MkdirAll(personal, os.ModePerm); err != nil {
+				fmt.Fprintf(
+					os.Stderr,
+					"failed to create config: failed to create directory: %s: %v\n",
+					personal,
+					err)
+				os.Exit(1)
+			}
+		}
+
 		// the config file does not exist, so we'll try to create one
 		if err = config.Init(confpaths[0], configs()); err != nil {
 			fmt.Fprintf(

cmd/cheat/str_config.go

@@ -52,14 +52,14 @@ cheatpaths:
   # Once downloaded, ensure that 'path' below points to the location at which
   # you downloaded the community cheatsheets.
   - name: community
-    path: ~/cheat/cheatsheets/community
+    path: ~/.config/cheat/cheatsheets/community
     tags: [ community ]
     readonly: true
 
   # If you have personalized cheatsheets, list them last. They will take
   # precedence over the more global cheatsheets.
   - name: personal
-    path: ~/cheat/cheatsheets/personal
+    path: ~/.config/cheat/cheatsheets/personal
     tags: [ personal ]
     readonly: false
 

configs/conf.yml

@@ -43,14 +43,14 @@ cheatpaths:
   # Once downloaded, ensure that 'path' below points to the location at which
   # you downloaded the community cheatsheets.
   - name: community
-    path: ~/cheat/cheatsheets/community
+    path: ~/.config/cheat/cheatsheets/community
     tags: [ community ]
     readonly: true
 
   # If you have personalized cheatsheets, list them last. They will take
   # precedence over the more global cheatsheets.
   - name: personal
-    path: ~/cheat/cheatsheets/personal
+    path: ~/.config/cheat/cheatsheets/personal
     tags: [ personal ]
     readonly: false
 

internal/installer/clone.go

@@ -0,0 +1,24 @@
+package installer
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+)
+
+const cloneURL = "https://github.com/cheat/cheatsheets.git"
+
+// Clone clones the community cheatsheets
+func Clone(path string) error {
+
+	// perform the clone in a shell
+	cmd := exec.Command("git", "clone", cloneURL, path)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	err := cmd.Run()
+	if err != nil {
+		return fmt.Errorf("failed to clone cheatsheets: %v", err)
+	}
+
+	return nil
+}

internal/installer/installer.go

@@ -0,0 +1 @@
+package installer

internal/installer/prompt.go

@@ -0,0 +1,37 @@
+package installer
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+)
+
+// Prompt prompts the user for a answer
+func Prompt(prompt string, def bool) (bool, error) {
+
+	// initialize a line reader
+	reader := bufio.NewReader(os.Stdin)
+
+	// display the prompt
+	fmt.Print(fmt.Sprintf("%s: ", prompt))
+
+	// read the answer
+	ans, err := reader.ReadString('\n')
+	if err != nil {
+		return false, fmt.Errorf("failed to parse input: %v", err)
+	}
+
+	// normalize the answer
+	ans = strings.ToLower(strings.TrimRight(ans, "\n"))
+
+	// return the appropriate response
+	switch ans {
+	case "y":
+		return true, nil
+	case "":
+		return def, nil
+	default:
+		return false, nil
+	}
+}