Update S3 features and make S3 support optional

Cargo.toml

@@ -19,7 +19,6 @@ rocket = "0.4.11"
 rocket_contrib = { version = "0.4.11", features = ["json"] }
 rocket_i18n = "0.4.1"
 scheduled-thread-pool = "0.2.6"
-#aws-creds = { version = "0.34", default-features = false, features = ["native-tls"] }
 serde = "1.0.137"
 serde_json = "1.0.81"
 shrinkwraprs = "0.3.0"
@@ -69,7 +68,7 @@ ructe = "0.15.0"
 rsass = "0.26"
 
 [features]
-default = ["postgres", "s3"]
+default = ["postgres"]
 postgres = ["plume-models/postgres", "diesel/postgres"]
 sqlite = ["plume-models/sqlite", "diesel/sqlite"]
 debug-mailer = []

plume-models/Cargo.toml

@@ -18,7 +18,6 @@ rocket_i18n = "0.4.1"
 reqwest = "0.11.11"
 scheduled-thread-pool = "0.2.6"
 serde = "1.0.137"
-#rust-s3 = { version = "0.29.0", default-features = false, features = ["blocking"] }
 rust-s3 = { version = "0.33.0", optional = true, features = ["blocking"] }
 serde_derive = "1.0"
 serde_json = "1.0.81"

plume-models/src/config.rs

@@ -6,9 +6,8 @@ use rocket::Config as RocketConfig;
 use std::collections::HashSet;
 use std::env::{self, var};
 
-use s3::{Bucket, Region};
-use s3::creds::Credentials;
-
+#[cfg(feature = "s3")]
+use s3::{Bucket, Region, creds::Credentials};
 
 #[cfg(not(test))]
 const DB_NAME: &str = "plume";
@@ -382,6 +381,7 @@ pub struct S3Config {
 }
 
 impl S3Config {
+    #[cfg(feature = "s3")]
     pub fn get_bucket(&self) -> Bucket {
         let region = Region::Custom {
             region: self.region.clone(),
@@ -411,6 +411,12 @@ fn get_s3_config() -> Option<S3Config> {
     if bucket.is_none() && access_key_id.is_none() && access_key_secret.is_none() {
         return None;
     }
+
+    #[cfg(not(feature = "s3"))]
+    panic!("S3 support is not enabled in this build");
+
+    #[cfg(feature = "s3")]
+    {
         if bucket.is_none() || access_key_id.is_none() || access_key_secret.is_none() {
             panic!("Invalid S3 configuration: some required values are set, but not others");
         }
@@ -434,6 +440,7 @@ fn get_s3_config() -> Option<S3Config> {
         let direct_download = string_to_bool(&direct_download, "S3_DIRECT_DOWNLOAD");
 
         let alias = var("S3_ALIAS_HOST").ok();
+
         Some(S3Config {
             bucket,
             access_key_id,
@@ -447,6 +454,7 @@ fn get_s3_config() -> Option<S3Config> {
             alias,
         })
     }
+}
 
 lazy_static! {
     pub static ref CONFIG: Config = Config {

plume-models/src/medias.rs

@@ -170,9 +170,12 @@ impl Media {
 
     pub fn delete(&self, conn: &Connection) -> Result<()> {
         if !self.is_remote {
-            if let Some(config) = &CONFIG.s3 {
-                config.get_bucket()
+            if CONFIG.s3.is_some() {
+                #[cfg(feature = "s3")]
+                CONFIG.s3.as_ref().unwrap().get_bucket()
                     .delete_object_blocking(&self.file_path)?;
+                #[cfg(not(feature="s3"))]
+                unreachable!();
             } else {
                 fs::remove_file(self.file_path.as_str())?;
             }

src/routes/mod.rs

@@ -9,7 +9,7 @@ use rocket::{
     http::{
         hyper::header::{CacheControl, CacheDirective, ETag, EntityTag},
         uri::{FromUriParam, Query},
-        ContentType, RawStr, Status,
+        RawStr, Status,
     },
     request::{self, FromFormValue, FromRequest, Request},
     response::{self, Flash, NamedFile, Redirect, Responder, Response},
@@ -21,6 +21,9 @@ use std::{
     path::{Path, PathBuf},
 };
 
+#[cfg(feature = "s3")]
+use rocket::http::ContentType;
+
 /// Special return type used for routes that "cannot fail", and instead
 /// `Redirect`, or `Flash<Redirect>`, when we cannot deliver a `Ructe` Response
 #[allow(clippy::large_enum_variant)]
@@ -207,6 +210,7 @@ pub mod well_known;
 #[derive(Responder)]
 enum FileKind {
     Local(NamedFile),
+    #[cfg(feature = "s3")]
     S3(Vec<u8>, ContentType),
 }
 
@@ -259,18 +263,23 @@ pub fn plume_static_files(file: PathBuf, build_id: &RawStr) -> Option<CachedFile
 }
 #[get("/static/media/<file..>")]
 pub fn plume_media_files(file: PathBuf) -> Option<CachedFile> {
-    if let Some(config) = &CONFIG.s3 {
+    if CONFIG.s3.is_some() {
+        #[cfg(feature="s3")]
+        {
             let ct = file.extension()
                 .and_then(|ext| ContentType::from_extension(&ext.to_string_lossy()))
                 .unwrap_or(ContentType::Binary);
 
-        let data = config.get_bucket()
+            let data = CONFIG.s3.as_ref().unwrap().get_bucket()
                 .get_object_blocking(format!("plume-media/{}", file.to_string_lossy())).ok()?;
 
             Some(CachedFile {
                 inner: FileKind::S3 ( data.to_vec(), ct),
                 cache_control: CacheControl(vec![CacheDirective::MaxAge(60 * 60 * 24 * 30)]),
             })
+        }
+        #[cfg(not(feature="s3"))]
+        unreachable!();
     } else {
         NamedFile::open(Path::new(&CONFIG.media_directory).join(file))
             .ok()