iss#6: implemented logic to determine how skywire-updater finds config file.

.gitignore

@@ -7,4 +7,5 @@
 *.out
 .idea/
 coverage/
-db.json
+db.json
+.vscode/

Makefile

@@ -15,6 +15,7 @@ install-linters: ## Install linters
 	# For some reason this install method is not recommended, see https://github.com/golangci/golangci-lint#install
 	# However, they suggest `curl ... | bash` which we should not do
 	GO111MODULE=on go get -u github.com/golangci/golangci-lint/cmd/golangci-lint
+	# GO111MODULE=on go get github.com/golangci/golangci-lint/cmd/[email protected]
 
 format: ## Formats the code. Must have goimports installed (use make install-linters).
 	GO111MODULE=on goimports -w -local github.com/watercompany/skywire-updater ./pkg

README.md

@@ -8,14 +8,15 @@
 $ skywire-updater -h
 
 skywire-updater is responsible for checking for updates, and updating services
-associated with skywire.
+associated with skywire. 
 
 It takes one optional argument [config-path] which specifies the path to the
 configuration file to use. If no [config-path] is specified, the following 
 directories are searched in order:
 
-  1. /Users/anonymous/.skycoin/skywire-updater/config.yml
-  2. /usr/local/skycoin/skywire-updater/config.yml
+  1. /your_working_directory/config.yml
+  2. /home/anonymous/.skycoin/skywire-updater/config.yml
+  3. /usr/local/skycoin/skywire-updater/config.yml
 
 Usage:
   skywire-updater [config-path] [flags]

cmd/skywire-updater/commands/gen-config.go

@@ -6,11 +6,10 @@ import (
 	"os"
 	"path/filepath"
 
+	"github.com/skycoin/skywire-updater/pkg/update"
+	"github.com/skycoin/skywire/pkg/util/pathutil"
 	"github.com/spf13/cobra"
 	"gopkg.in/yaml.v2"
-
-	"github.com/skycoin/skywire-updater/internal/pathutil"
-	"github.com/skycoin/skywire-updater/pkg/update"
 )
 
 const (
@@ -98,7 +97,7 @@ var initConfigCmd = &cobra.Command{
 }
 
 func init() {
-	initConfigCmd.Flags().StringVarP(&output, "output", "o", defaultConfigPaths[0], "path of output config file.")
+	initConfigCmd.Flags().StringVarP(&output, "output", "o", defaultPaths[pathutil.HomeLoc], "path of output config file.")
 	initConfigCmd.Flags().BoolVarP(&replace, "replace", "r", false, "whether to allow rewrite of a file that already exists.")
 	initConfigCmd.Flags().StringVarP(&mode, "mode", "m", homeMode, fmt.Sprintf("config generation mode. Valid values: %v", initConfigModes))
 }

cmd/skywire-updater/commands/root.go

@@ -1,65 +1,57 @@
 package commands
 
 import (
-	"errors"
 	"fmt"
 	"net"
 	"net/http"
 	"os"
 	"path/filepath"
 
 	"github.com/skycoin/skycoin/src/util/logging"
-	"github.com/spf13/cobra"
-
-	"github.com/skycoin/skywire-updater/internal/pathutil"
 	"github.com/skycoin/skywire-updater/pkg/api"
 	"github.com/skycoin/skywire-updater/pkg/store"
 	"github.com/skycoin/skywire-updater/pkg/update"
+	"github.com/skycoin/skywire/pkg/util/pathutil"
+	"github.com/spf13/cobra"
 )
 
-var log = logging.MustGetLogger("skywire-updater")
+const configEnv = "SW_UPDATER_CONFIG"
 
-var defaultConfigPaths = [2]string{
-	filepath.Join(pathutil.HomeDir(), ".skycoin/skywire-updater/config.yml"),
-}
+var log = logging.MustGetLogger("skywire-updater")
 
-func findConfigPath() (string, error) {
-	log.Info("configuration file is not explicitly specified, attempting to find one in default paths ...")
-	for i, cPath := range defaultConfigPaths {
-		if _, err := os.Stat(cPath); err != nil {
-			log.Infof("- [%d/%d] '%s' does not exist", i, len(defaultConfigPaths), cPath)
-		} else {
-			log.Infof("- [%d/%d] '%s' exists (using this one)", i, len(defaultConfigPaths), cPath)
-			return cPath, nil
-		}
+// UpdaterDefaults returns the default config paths for Skywire-Updater.
+func UpdaterDefaults() pathutil.ConfigPaths {
+	paths := make(pathutil.ConfigPaths)
+	if wd, err := os.Getwd(); err == nil {
+		paths[pathutil.WorkingDirLoc] = filepath.Join(wd, "config.yml")
 	}
-	return "", errors.New("no configuration file found")
+	paths[pathutil.HomeLoc] = filepath.Join(pathutil.HomeDir(), ".skycoin/skywire-updater/config.yml")
+	paths[pathutil.LocalLoc] = "/usr/local/skycoin/skywire-updater/config.yml"
+	return paths
 }
 
+var defaultPaths = UpdaterDefaults()
+
 // RootCmd is the command to run when no sub-commands are specified.
+// TraverseChildren set to true enables cobra to parse local flags on each command before executing target command
 var RootCmd = &cobra.Command{
-	Use: "skywire-updater [config-path]",
+	Use:   "skywire-updater [config-path]",
+	Short: "Updates skywire services",
 	Long: fmt.Sprintf(`
 skywire-updater is responsible for checking for updates, and updating services
 associated with skywire.
 
 It takes one optional argument [config-path] which specifies the path to the
-configuration file to use. If no [config-path] is specified, the following 
+configuration file to use. If no [config-path] is specified, the following
 directories are searched in order:
 
   1. %s
-  2. %s`, defaultConfigPaths[0], defaultConfigPaths[1]),
-	Short: "Updates skywire services",
+  2. %s
+  3. %s`, defaultPaths[pathutil.WorkingDirLoc], defaultPaths[pathutil.HomeLoc], defaultPaths[pathutil.LocalLoc]),
+	TraverseChildren: true,
 	Run: func(_ *cobra.Command, args []string) {
-		var configPath string
-		if len(args) == 0 {
-			var err error
-			if configPath, err = findConfigPath(); err != nil {
-				log.WithError(err).Fatal()
-			}
-		} else {
-			configPath = args[0]
-		}
+
+		configPath := pathutil.FindConfigPath(args, 0, configEnv, UpdaterDefaults())
 
 		log.Infof("config path: '%s'", configPath)
 		conf := update.NewConfig(".", "./bin")
@@ -95,11 +87,13 @@ directories are searched in order:
 	},
 }
 
-// Execute executes root CLI command.
+// Execute executes root CLI command and add subcommands.
 func Execute() {
+
 	RootCmd.AddCommand(initConfigCmd)
 
 	if err := RootCmd.Execute(); err != nil {
 		os.Exit(1)
 	}
+
 }

go.mod

@@ -2,19 +2,11 @@ module github.com/skycoin/skywire-updater
 
 require (
 	github.com/go-chi/chi v4.0.2+incompatible
-	github.com/inconshreveable/mousetrap v1.0.0 // indirect
 	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
-	github.com/kr/pretty v0.1.0 // indirect
-	github.com/mattn/go-colorable v0.1.1 // indirect
 	github.com/mattn/go-isatty v0.0.6 // indirect
-	github.com/mgutz/ansi v0.0.0-20170206155736-9520e82c474b // indirect
-	github.com/sirupsen/logrus v1.3.0 // indirect
 	github.com/skycoin/skycoin v0.25.1
+	github.com/skycoin/skywire v0.1.2-0.20190418071242-c3a15be79321
 	github.com/spf13/cobra v0.0.3
-	github.com/spf13/pflag v1.0.3 // indirect
 	github.com/stretchr/testify v1.3.0
-	golang.org/x/crypto v0.0.0-20190228161510-8dd112bcdc25 // indirect
-	golang.org/x/sys v0.0.0-20190306071516-a98ae47d97a5 // indirect
-	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
 	gopkg.in/yaml.v2 v2.2.2
 )