Move gocloud.dev/blob driver imports to main.go (#110)

Importing blob drivers in one place makes it easier to customize the
resulting binary. Users who don't want/need these drivers can cut the
binary size in half by not importing them.

cmd/sansshell-server/main.go

@@ -32,6 +32,10 @@ import (
 	"github.com/go-logr/logr"
 	"github.com/go-logr/stdr"
 
+	_ "gocloud.dev/blob/azureblob" // Pull in Azure blob support
+	_ "gocloud.dev/blob/gcsblob"   // Pull in GCS blob support
+	_ "gocloud.dev/blob/s3blob"    // Pull in S3 blob support
+
 	"github.com/Snowflake-Labs/sansshell/auth/mtls"
 	mtlsFlags "github.com/Snowflake-Labs/sansshell/auth/mtls/flags"
 	"github.com/Snowflake-Labs/sansshell/auth/opa"

services/localfile/server/localfile.go

@@ -36,9 +36,6 @@ import (
 	"time"
 
 	"gocloud.dev/blob"
-	_ "gocloud.dev/blob/azureblob" // Pull in Azure blob support
-	_ "gocloud.dev/blob/gcsblob"   // Pull in GCS blob support
-	_ "gocloud.dev/blob/s3blob"    // Pull in S3 blob support
 
 	"github.com/Snowflake-Labs/sansshell/services"
 	pb "github.com/Snowflake-Labs/sansshell/services/localfile"

services/process/server/process.go

@@ -29,9 +29,6 @@ import (
 	"syscall"
 
 	"gocloud.dev/blob"
-	_ "gocloud.dev/blob/azureblob" // Bring Azure blob support in.
-	_ "gocloud.dev/blob/gcsblob"   // Bring GCS blob support in.
-	_ "gocloud.dev/blob/s3blob"    // Bring S3 blob support in.
 
 	"github.com/Snowflake-Labs/sansshell/services"
 	pb "github.com/Snowflake-Labs/sansshell/services/process"