Remove s3 from default features

.github/workflows/rust.yml

@@ -92,7 +92,7 @@ jobs:
 
   # S3 integration tests can't run from CI because they need credentials, but we
   # can at least make sure that they compile.
-  build-large-tests:
+  build-all-features:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -101,22 +101,9 @@ jobs:
           toolchain: stable
       - uses: swatinem/rust-cache@v2
       - name: cargo build
-        run: cargo build --all-targets --features s3,s3-integration-test
+        run: cargo build --all-targets --all-features
 
   clippy:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: stable
-      - uses: swatinem/rust-cache@v2
-      - name: clippy
-        run: cargo clippy --all-targets -- --deny clippy::all
-
-  # Not all features can be run: s3 integration tests require credentials.
-  # But all of them should compile.
-  check-all-features:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4

Cargo.toml

@@ -93,7 +93,7 @@ rstest = { version = "0.19", default-features = false }
 tracing-test = { version = "0.2", features = ["no-env-filter"] }
 
 [features]
-default = ["s3"]
+default = []
 # blake2-rfc/simd_asm needs nightly, so it's no longer a feature here so that --all-features works on stable.
 # blake2_simd_asm = ["blake2-rfc/simd_asm"]
 s3 = [

NEWS.md

@@ -1,5 +1,9 @@
 # Conserve release history
 
+## Unreleased
+
+- Changed: S3 is no longer built by default, because it adds many dependencies. It can be turned on again with `--features s3`.
+
 ## 24.8.0
 
 - Fixed: `restore --only` specifying a subdirectory no longer fails due to parent directories missing from the destination.

README.md

@@ -114,8 +114,7 @@ automatically excluded from backups.
 From 23.9 Conserve supports storing backups in Amazon S3. AWS IAM credentials are
 read from the standard sources: the environment, config file, or, on EC2, the instance metadata service.
 
-S3 support can be turned off by passing `cargo install --no-default-features`. (There's no
-runtime impact if it is not used, but it does add a lot of build-time dependencies.)
+S3 support is not built by default, but can be turned on by passing `cargo install --features s3`.
 
 To use this, just specify an S3 URL for the archive location. The bucket must already exist.