add customized store path support

README.md

@@ -27,6 +27,7 @@ SKM is a simple and powerful SSH Keys Manager. It helps you to manage your multi
 * Rename SSH key alias name
 * Backup and restore all your SSH keys
 * Prompt UI for SSH key selection
+* Customized SSH key store path
 
 ## Installation
 
@@ -285,6 +286,15 @@ __List your cached SSH keys from SSH agent__
 2048 SHA256:qAVcwc0tdUOCjH3sTskwxAmfMQiL2sKtfPBXFnUoZHQ /Users/timothy/.skm/my/id_rsa (RSA)
 ```
 
+### Customized SSH key store path
+
+By default, SKM uses `$HOME/.skm` as the default path of SSH key store.
+You can define your customized in your `~/.bashrc` or `~/.zshrc` by adding:
+
+```bash
+SKM_STORE_PATH=/usr/local/.skm
+```
+
 ### Hook mechanism
 
 Edit and place a executable file named ```hook``` at the specified key directory, for example:

cmd/skm/main.go

@@ -15,6 +15,13 @@ import (
 var defaultStorePath = filepath.Join(os.Getenv("HOME"), ".skm")
 var defaultSSHPath = filepath.Join(os.Getenv("HOME"), ".ssh")
 
+func init() {
+	// initialize the store path
+	if envStorePath := os.Getenv("SKM_STORE_PATH"); envStorePath != "" {
+		defaultStorePath = envStorePath
+	}
+}
+
 func main() {
 	parseArgs()
 

go.mod

@@ -15,3 +15,5 @@ require (
 	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
 	gopkg.in/urfave/cli.v1 v1.20.0
 )
+
+go 1.13