Add github authentication to egeria github api (#2)

* Add github authentication to egeria github api

* Panic on init of egeria service

egeria/cmd/egeria/main.go

@@ -1,24 +1,50 @@
 package main
 
 import (
+	"context"
+	"fmt"
 	"log/slog"
+	"os"
+	"strconv"
 	"time"
 
 	stdHttp "net/http"
 
 	"github.com/docker/docker/client"
 	"github.com/go-chi/httplog/v2"
 	"github.com/google/go-github/v66/github"
+	"github.com/jferrl/go-githubauth"
 	"github.com/trento-project/werkzeugoffer/egeria/internal/environment"
 	"github.com/trento-project/werkzeugoffer/egeria/internal/http"
+	"golang.org/x/oauth2"
 )
 
 // We exclude that variables from linting
 // because we explicitly use that
 // in the ldflags at build time
 var Version string //nolint
 
+func mustHaveEnv(name string) string {
+	value := os.Getenv(name)
+	if value == "" {
+		panic(fmt.Sprintf("env %s not provided, aborting init", value))
+	}
+	return value
+}
+
 func main() {
+	appCtx := context.Background()
+
+	privateKey := []byte(mustHaveEnv("GITHUB_APP_PRIVATE_KEY"))
+	appID, err := strconv.ParseInt(mustHaveEnv("GITHUB_APP_ID"), 10, 64)
+	if err != nil {
+		panic(err)
+	}
+	installationID, err := strconv.ParseInt(mustHaveEnv("GITHUB_INSTALLATION_ID"), 10, 64)
+	if err != nil {
+		panic(err)
+	}
+
 	cli, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
 	if err != nil {
 		panic(err)
@@ -38,7 +64,15 @@ func main() {
 		QuietDownPeriod: 10 * time.Second,
 	})
 
-	githubClient := github.NewClient(nil)
+	appTokenSource, err := githubauth.NewApplicationTokenSource(appID, []byte(privateKey))
+	if err != nil {
+		fmt.Println("Error creating application token source:", err)
+		return
+	}
+
+	installationTokenSource := githubauth.NewInstallationTokenSource(installationID, appTokenSource)
+	githubHttpClient := oauth2.NewClient(appCtx, installationTokenSource)
+	githubClient := github.NewClient(githubHttpClient)
 
 	apiLogger.Info("starting", "version", Version)
 

egeria/go.mod

@@ -22,7 +22,10 @@ require (
 	github.com/go-logr/logr v1.4.2 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/golang-jwt/jwt/v5 v5.2.1 // indirect
+	github.com/google/go-github/v64 v64.0.0 // indirect
 	github.com/google/go-querystring v1.1.0 // indirect
+	github.com/jferrl/go-githubauth v1.1.1 // indirect
 	github.com/moby/docker-image-spec v1.3.1 // indirect
 	github.com/moby/term v0.5.0 // indirect
 	github.com/morikuni/aec v1.0.0 // indirect
@@ -35,6 +38,7 @@ require (
 	go.opentelemetry.io/otel/metric v1.32.0 // indirect
 	go.opentelemetry.io/otel/sdk v1.32.0 // indirect
 	go.opentelemetry.io/otel/trace v1.32.0 // indirect
+	golang.org/x/oauth2 v0.24.0 // indirect
 	golang.org/x/sys v0.27.0 // indirect
 	golang.org/x/time v0.8.0 // indirect
 	gotest.tools/v3 v3.5.1 // indirect

egeria/go.sum

@@ -35,9 +35,13 @@ github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
 github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
+github.com/golang-jwt/jwt/v5 v5.2.1 h1:OuVbFODueb089Lh128TAcimifWaLhJwVflnrgM17wHk=
+github.com/golang-jwt/jwt/v5 v5.2.1/go.mod h1:pqrtFR0X4osieyHYxtmOUWsAWrfe1Q5UVIyoH402zdk=
 github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/go-github/v64 v64.0.0 h1:4G61sozmY3eiPAjjoOHponXDBONm+utovTKbyUb2Qdg=
+github.com/google/go-github/v64 v64.0.0/go.mod h1:xB3vqMQNdHzilXBiO2I+M7iEFtHf+DP/omBOv6tQzVo=
 github.com/google/go-github/v66 v66.0.0 h1:ADJsaXj9UotwdgK8/iFZtv7MLc8E8WBl62WLd/D/9+M=
 github.com/google/go-github/v66 v66.0.0/go.mod h1:+4SO9Zkuyf8ytMj0csN1NR/5OTR+MfqPp8P8dVlcvY4=
 github.com/google/go-querystring v1.1.0 h1:AnCroh3fv4ZBgVIf1Iwtovgjaw/GiKJo8M8yD/fhyJ8=
@@ -46,6 +50,8 @@ github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.23.0 h1:ad0vkEBuk23VJzZR9nkLVG0YAoN9coASF1GusYX6AlU=
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.23.0/go.mod h1:igFoXX2ELCW06bol23DWPB5BEWfZISOzSP5K2sbLea0=
+github.com/jferrl/go-githubauth v1.1.1 h1:HfF3eeWFL+9jV9KHAatBaEnFGm9R2LkTqo5Z2GcDk20=
+github.com/jferrl/go-githubauth v1.1.1/go.mod h1:FC1jqgik3xdaZDg8CUmGbvDwfP/egXkrq6Ygl9pSz/Y=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
@@ -100,6 +106,8 @@ golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.30.0 h1:AcW1SDZMkb8IpzCdQUaIq2sP4sZ4zw+55h6ynffypl4=
 golang.org/x/net v0.30.0/go.mod h1:2wGyMJ5iFasEhkwi13ChkO/t1ECNC4X4eBKkVFyYFlU=
+golang.org/x/oauth2 v0.24.0 h1:KTBBxWqUa0ykRPLtV69rRto9TLXcqYkeswu48x/gvNE=
+golang.org/x/oauth2 v0.24.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=