From b81691f3bb9a77df61878ad6874d87b5337e3ecb Mon Sep 17 00:00:00 2001
From: k1LoW <k1lowxb@gmail.com>
Date: Fri, 6 Oct 2023 15:45:40 +0900
Subject: [PATCH] Detect artifact using GOOS and GOARCH

---
 dewy.go                |  3 +++
 dewy_test.go           |  1 -
 registory/registory.go |  4 +++
 repo/github_release.go | 60 ++++++++++++++++++++++++++++++++++++------
 4 files changed, 59 insertions(+), 9 deletions(-)

diff --git a/dewy.go b/dewy.go
index 78cb5ff..084a5f1 100644
--- a/dewy.go
+++ b/dewy.go
@@ -8,6 +8,7 @@ import (
 	"os"
 	"os/signal"
 	"path/filepath"
+	"runtime"
 	"sort"
 	"sync"
 	"syscall"
@@ -124,6 +125,8 @@ func (d *Dewy) Run() error {
 
 	// Get current
 	res, err := d.registory.Current(&registory.CurrentRequest{
+		Arch:         runtime.GOARCH,
+		OS:           runtime.GOOS,
 		ArtifactName: d.config.Repository.Artifact,
 	})
 	if err != nil {
diff --git a/dewy_test.go b/dewy_test.go
index ea6f3fe..d29fa21 100644
--- a/dewy_test.go
+++ b/dewy_test.go
@@ -62,7 +62,6 @@ func TestRun(t *testing.T) {
 	c.Repository = repo.Config{
 		Owner:                 "linyows",
 		Repo:                  "dewy",
-		Artifact:              "dewy_darwin_x86_64.tar.gz",
 		DisableRecordShipping: true,
 	}
 	c.Cache = CacheConfig{
diff --git a/registory/registory.go b/registory/registory.go
index 3e4a2e4..7ab664d 100644
--- a/registory/registory.go
+++ b/registory/registory.go
@@ -9,6 +9,10 @@ type Registory interface {
 
 // CurrentRequest is the request to get the current artifact.
 type CurrentRequest struct {
+	// Arch is the CPU architecture of deployment environment.
+	Arch string
+	// OS is the operating system of deployment environment.
+	OS string
 	// ArtifactName is the name of the artifact to fetch.
 	// FIXME: If possible, ArtifactName should be optional.
 	ArtifactName string
diff --git a/repo/github_release.go b/repo/github_release.go
index 77a44d1..4f381d1 100644
--- a/repo/github_release.go
+++ b/repo/github_release.go
@@ -100,22 +100,66 @@ func (g *GithubRelease) Current(req *registory.CurrentRequest) (*registory.Curre
 	if err != nil {
 		return nil, err
 	}
+	var artifactName string
 
-	found := false
-	for _, v := range release.Assets {
-		if v.GetName() == req.ArtifactName {
-			found = true
+	if req.ArtifactName != "" {
+		artifactName = req.ArtifactName
+		found := false
+		for _, v := range release.Assets {
+			if v.GetName() == artifactName {
+				found = true
+				log.Printf("[DEBUG] Fetched: %+v", v)
+				g.downloadURL = v.GetBrowserDownloadURL()
+				g.updatedAt = v.GetUpdatedAt()
+				break
+			}
+		}
+		if !found {
+			return nil, fmt.Errorf("artifact not found: %s", artifactName)
+		}
+	} else {
+		archMatchs := []string{req.Arch}
+		if req.Arch == "amd64" {
+			archMatchs = append(archMatchs, "x86_64")
+		}
+		osMatchs := []string{req.OS}
+		if req.OS == "darwin" {
+			osMatchs = append(osMatchs, "macos")
+		}
+		found := false
+		for _, v := range release.Assets {
+			n := strings.ToLower(v.GetName())
+			for _, arch := range archMatchs {
+				if strings.Contains(n, arch) {
+					found = true
+					break
+				}
+			}
+			if !found {
+				continue
+			}
+			found = false
+			for _, os := range osMatchs {
+				if strings.Contains(n, os) {
+					found = true
+					break
+				}
+			}
+			if !found {
+				continue
+			}
+			artifactName = v.GetName()
 			log.Printf("[DEBUG] Fetched: %+v", v)
 			g.downloadURL = v.GetBrowserDownloadURL()
 			g.updatedAt = v.GetUpdatedAt()
 			break
 		}
-	}
-	if !found {
-		return nil, fmt.Errorf("artifact not found: %s", req.ArtifactName)
+		if !found {
+			return nil, fmt.Errorf("artifact not found: %s", artifactName)
+		}
 	}
 
-	au := fmt.Sprintf("github_release://%s/%s/tag/%s/%s", g.owner, g.repo, release.GetTagName(), req.ArtifactName)
+	au := fmt.Sprintf("github_release://%s/%s/tag/%s/%s", g.owner, g.repo, release.GetTagName(), artifactName)
 
 	return &registory.CurrentResponse{
 		ID:          time.Now().Format(ISO8601),