Re-wrote from scratch in Golang

- Re-implemented the project in Golang, and deprecated Python entirely
- Implemented several new, long-requested features
- Refactored cheatsheets into a separate repository

internal/config/path.go

@@ -0,0 +1,68 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"path"
+
+	"github.com/mitchellh/go-homedir"
+)
+
+// Path returns the config file path
+func Path(sys string) (string, error) {
+
+	var paths []string
+
+	// if CHEAT_CONFIG_PATH is set, return it
+	if os.Getenv("CHEAT_CONFIG_PATH") != "" {
+
+		// expand ~
+		expanded, err := homedir.Expand(os.Getenv("CHEAT_CONFIG_PATH"))
+		if err != nil {
+			return "", fmt.Errorf("failed to expand ~: %v", err)
+		}
+
+		return expanded, nil
+
+		// OSX config paths
+	} else if sys == "darwin" {
+
+		paths = []string{
+			path.Join(os.Getenv("XDG_CONFIG_HOME"), "/cheat/conf.yml"),
+			path.Join(os.Getenv("HOME"), ".config/cheat/conf.yml"),
+			path.Join(os.Getenv("HOME"), ".cheat/conf.yml"),
+		}
+
+		// Linux config paths
+	} else if sys == "linux" {
+
+		paths = []string{
+			path.Join(os.Getenv("XDG_CONFIG_HOME"), "/cheat/conf.yml"),
+			path.Join(os.Getenv("HOME"), ".config/cheat/conf.yml"),
+			path.Join(os.Getenv("HOME"), ".cheat/conf.yml"),
+			"/etc/cheat/conf.yml",
+		}
+
+		// Windows config paths
+	} else if sys == "windows" {
+
+		paths = []string{
+			fmt.Sprintf("%s/cheat/conf.yml", os.Getenv("APPDATA")),
+			fmt.Sprintf("%s/cheat/conf.yml", os.Getenv("PROGRAMDATA")),
+		}
+
+		// Unsupported platforms
+	} else {
+		return "", fmt.Errorf("unsupported os: %s", sys)
+	}
+
+	// check if the config file exists on any paths
+	for _, p := range paths {
+		if _, err := os.Stat(p); err == nil {
+			return p, nil
+		}
+	}
+
+	// we can't find the config file if we make it this far
+	return "", fmt.Errorf("could not locate config file")
+}