feat: download preview releases

.gitignore

@@ -24,4 +24,7 @@ go.work.sum
 # env file
 .env
 
-.idea
+.idea
+duckdb
+duckdb.exe
+

download/download.go

@@ -76,15 +76,29 @@ func Do(spec Spec) (Result, error) {
 		return res, nil
 	}
 	res.Downloaded = true
-	path := getGithubURL(spec)
+	path := getZipDownloadUrl(spec)
 	tmpFile, err := fetchZip(path)
 	if err != nil {
 		return res, err
 	}
 	defer func() {
 		_ = os.Remove(tmpFile)
 	}()
-	return res, extractOne(tmpFile, entryName)
+	return res, processZip(spec, entryName, tmpFile)
+}
+
+func processZip(spec Spec, entryName string, zipFile string) error {
+	if spec.Version != PreviewVersion {
+		return extractOne(zipFile, entryName)
+	}
+	return processPreviewZip(spec, entryName, zipFile)
+}
+
+func getZipDownloadUrl(spec Spec) string {
+	if spec.Version == PreviewVersion {
+		return getPreviewZipUrl(spec)
+	}
+	return getGithubURL(spec)
 }
 
 func existsAppropriate(fileName string) bool {
@@ -95,16 +109,21 @@ func existsAppropriate(fileName string) bool {
 }
 
 func getGithubURL(spec Spec) string {
-	var archivePrefix string
-	switch spec.Type {
+	archivePrefix := getPrefixByType(spec.Type)
+	return fmt.Sprintf("%s/download/%s/%s-%s-%s.zip", duckDbReleasesRoot, spec.Version, archivePrefix, spec.OS, spec.Arch)
+}
+
+func getPrefixByType(typ BinType) string {
+	var prefix string
+	switch typ {
 	case BinTypeCli:
-		archivePrefix = "duckdb_cli"
+		prefix = "duckdb_cli"
 	case BinTypeDynLib:
-		archivePrefix = "libduckdb"
+		prefix = "libduckdb"
 	default:
 		panic("unhandled spec type")
 	}
-	return fmt.Sprintf("%s/download/%s/%s-%s-%s.zip", duckDbReleasesRoot, spec.Version, archivePrefix, spec.OS, spec.Arch)
+	return prefix
 }
 
 func normalizeSpec(spec Spec) (Spec, error) {

download/download_test.go

@@ -17,6 +17,7 @@ func TestDo(t *testing.T) {
 			"v1.3.2",
 			"v1.4.0",
 			"latest",
+			"preview",
 		} {
 			t.Run(version, func(t *testing.T) {
 				for _, arch := range []string{

download/preview.go

@@ -0,0 +1,51 @@
+package download
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/ansel1/merry/v2"
+)
+
+const (
+	PreviewVersion = "preview"
+)
+
+func getPreviewZipUrl(spec Spec) string {
+	// https://artifacts.duckdb.org/latest/duckdb-binaries-osx.zip
+	// https://artifacts.duckdb.org/latest/duckdb-binaries-windows.zip
+	// https://artifacts.duckdb.org/latest/duckdb-binaries-linux-amd64.zip
+	archSuffix := ""
+	if spec.OS == "linux" {
+		archSuffix = "-" + spec.Arch
+	}
+	return fmt.Sprintf("https://artifacts.duckdb.org/latest/duckdb-binaries-%s%s.zip", spec.OS, archSuffix)
+}
+
+func processPreviewZip(spec Spec, entryName string, zipFile string) error {
+	innerZip := getInnerZipName(spec)
+	err := extractOne(zipFile, innerZip)
+	if err != nil {
+		return merry.Wrap(fmt.Errorf("failed to extract inner zip '%s' from '%s': %w", innerZip, zipFile, err))
+	}
+	defer func() {
+		_ = os.Remove(innerZip)
+	}()
+	err = extractOne(innerZip, entryName)
+	if err != nil {
+		return merry.Wrap(fmt.Errorf("failed to extract entry '%s' from inner zip '%s': %w", entryName, innerZip, err))
+	}
+	return nil
+}
+
+func getInnerZipName(spec Spec) string {
+	// duckdb_cli-osx-universal.zip
+	// libduckdb-osx-universal.zip
+	// duckdb_cli-windows-arm64.zip
+	// libduckdb-windows-amd64.zip
+	// duckdb_cli-linux-amd64.zip
+	// libduckdb-linux-amd64.zip
+	prefix := getPrefixByType(spec.Type)
+	// For osx, spec.Arch has been normalized to universal in normalizeSpec
+	return fmt.Sprintf("%s-%s-%s.zip", prefix, spec.OS, spec.Arch)
+}

go.mod

@@ -5,11 +5,11 @@ go 1.24.7
 require (
 	github.com/ansel1/merry/v2 v2.2.1
 	github.com/stretchr/testify v1.8.3
+	golang.org/x/mod v0.28.0
 )
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	golang.org/x/mod v0.28.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )