Setup configuration (#1)

* basic configuration setup

* add GH actions

.github/workflows/go.yml

@@ -0,0 +1,42 @@
+name: Build, run all tests
+on:
+  pull_request:
+
+  push:
+    branches:
+      - main
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+
+    services:
+
+    steps:
+
+    - name: Get the version
+      id: get_version
+      run: echo ::set-output name=tag::$(echo ${GITHUB_SHA:8})
+
+    - name: Set up Go
+      uses: actions/setup-go@v4
+      with:
+        go-version: ^1.21
+      id: go
+
+    - name: Check out code
+      uses: actions/checkout@v4
+      with:
+        submodules: true
+        token: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Get and verify dependencies
+      run: go mod download && go mod verify
+
+    - name: Build app to make sure there are zero issues
+      run: go build -o app ./cmd
+
+    - name: Run all tests
+      run: go test -tags integration -v ./...
+

.github/workflows/linter.yml

@@ -0,0 +1,18 @@
+name: golangci-lint
+on:
+  pull_request:
+jobs:
+  golangci:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v2
+        with:
+          args: --timeout=5m
+          # Optional: version of golangci-lint to use in form of v1.2 or v1.2.3 or `latest` to use the latest version
+          version: latest
+
+          # Optional: show only new issues if it's a pull request. The default value is `false`.
+          only-new-issues: true

cmd/cmd.go

@@ -0,0 +1,81 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"github.com/adelowo/sdump/config"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+var (
+	// Version describes the version of the current build.
+	Version = "dev"
+
+	// Commit describes the commit of the current build.
+	Commit = "none"
+
+	// Date describes the date of the current build.
+	Date = time.Now().UTC()
+)
+
+const (
+	defaultConfigFilePath = "config"
+	envPrefix             = "SDUMP"
+)
+
+func initializeConfig(cfg *config.Config) error {
+	homePath, err := os.UserHomeDir()
+	if err != nil {
+		return err
+	}
+
+	viper.AddConfigPath(filepath.Join(homePath, ".config", defaultConfigFilePath))
+	viper.AddConfigPath(".")
+
+	viper.SetConfigName(defaultConfigFilePath)
+	viper.SetConfigType("yml")
+
+	if err := viper.ReadInConfig(); err != nil {
+		if _, ok := err.(viper.ConfigFileNotFoundError); !ok {
+			return err
+		}
+	}
+
+	viper.SetEnvPrefix(envPrefix)
+
+	viper.AutomaticEnv()
+	viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
+
+	return viper.Unmarshal(cfg)
+}
+
+func setupFlags(cmd *cobra.Command) {
+	cmd.Flags().StringP("config", "c", defaultConfigFilePath, "Config file")
+}
+
+func Execute() error {
+	cfg := &config.Config{}
+
+	rootCmd := &cobra.Command{
+		Use:   "sdump",
+		Short: "sdump runs a SSH server that helps you view and inspect incoming http requests",
+		PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
+			return initializeConfig(cfg)
+		},
+		RunE: func(_ *cobra.Command, _ []string) error {
+			return nil
+		},
+	}
+
+	rootCmd.SetVersionTemplate(
+		fmt.Sprintf("Version: %v\nCommit: %v\nDate: %v\n", Version, Commit, Date))
+
+	setupFlags(rootCmd)
+
+	return rootCmd.Execute()
+}

config.yml

@@ -0,0 +1,2 @@
+ssh:
+  port: 2222

config/config.go

@@ -1,3 +1,16 @@
 package config
 
-type Config struct{}
+type SSHConfig struct {
+	// Port defines where the ssh server runs at
+	Port int `mapstructure:"port" json:"port,omitempty" yaml:"port"`
+	// Allowlist is an array pointing to a bunch of public keys that
+	// are allowed to connect to the ssh server
+	Allowlist []string `mapstructure:"allowlist" json:"allowlist,omitempty" yaml:"allowlist"`
+	// Identities is an array containing private keys for the ssh server
+	// By default it uses ~/.ssh/id_rsa only
+	Identities []string `mapstructure:"identities" json:"identities,omitempty" yaml:"identities"`
+}
+
+type Config struct {
+	SSH SSHConfig `mapstructure:"ssh" json:"ssh,omitempty" yaml:"ssh"`
+}

go.mod

@@ -1,3 +1,31 @@
 module github.com/adelowo/sdump
 
 go 1.21.5
+
+require (
+	github.com/spf13/cobra v1.8.0
+	github.com/spf13/pflag v1.0.5
+	github.com/spf13/viper v1.18.2
+)
+
+require (
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
+	github.com/hashicorp/hcl v1.0.0 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/magiconair/properties v1.8.7 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/pelletier/go-toml/v2 v2.1.0 // indirect
+	github.com/sagikazarmark/locafero v0.4.0 // indirect
+	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
+	github.com/sourcegraph/conc v0.3.0 // indirect
+	github.com/spf13/afero v1.11.0 // indirect
+	github.com/spf13/cast v1.6.0 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
+	go.uber.org/atomic v1.9.0 // indirect
+	go.uber.org/multierr v1.9.0 // indirect
+	golang.org/x/exp v0.0.0-20230905200255-921286631fa9 // indirect
+	golang.org/x/sys v0.15.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	gopkg.in/ini.v1 v1.67.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

@@ -0,0 +1,75 @@
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main.go

@@ -0,0 +1,13 @@
+package main
+
+import (
+	"log"
+
+	"github.com/adelowo/sdump/cmd"
+)
+
+func main() {
+	if err := cmd.Execute(); err != nil {
+		log.Fatal(err)
+	}
+}