Minimal versions testing

.travis.yml

@@ -1,7 +1,6 @@
 language: rust
 dist: xenial
 script:
-  - 'if [ "$WITH_LOCK" != "true" ]; then cargo update; fi'
   - 'cargo test --no-default-features'
   - 'cargo test --all-features'
 
@@ -16,14 +15,10 @@ env: # important!
 matrix:
   include:
     - rust: 1.32.0
-    - rust: 1.32.0
-      env: WITH_LOCK=true
     - rust: stable
-      env: WITH_LOCK=true
     - rust: nightly
       env: MAY_FAIL=true
     - rust: 1.32.0
       os: osx
-      env: WITH_LOCK=true
   allow_failures:
     - env: MAY_FAIL=true

lock-minimize.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/bash -ve
+
+cargo -Z minimal-versions generate-lockfile
+
+# Issue: https://github.com/rust-random/getrandom/pull/112
+# (merged, awaiting getrandom 0.1.13 release, rand release?)
+#
+# cfg-if v0.1.0
+# ├── getrandom v0.1.7
+# │   ├── rand v0.7.0
+# │   │   └── tempfile v3.1.0
+# │   │       [dev-dependencies]
+# │   │       └── olio v1.2.0 (/home/david/src/olio)
+# │   │   [dev-dependencies]
+# │   │   └── olio v1.2.0 (/home/david/src/olio) (*)
+# │   └── rand_core v0.5.0
+# │       ├── rand v0.7.0 (*)
+# │       ├── rand_chacha v0.2.0
+# │       │   └── rand v0.7.0 (*)
+# │       └── rand_hc v0.2.0
+# │           [dev-dependencies]
+# │           └── rand v0.7.0 (*)
+# └── tempfile v3.1.0 (*)
+cargo update -p cfg-if --precise 0.1.2
+
+# due to:
+# winapi v0.2.0
+# └── iovec v0.1.0
+#     └── bytes v0.4.6
+#         [dev-dependencies]
+#         └── olio v1.2.0 (/home/david/src/olio)
+# An upgrade to winapi (0.3, in 2017!) was never released:
+# https://github.com/carllerche/iovec/commit/b90b433f58fb8d64ad6c67d8080cf3da1fce3543
+cargo update -p winapi:0.2.0 --precise 0.2.8

src/lib.rs

@@ -73,10 +73,10 @@ pub static VERSION: &str = env!("CARGO_PKG_VERSION");
 /// ```
 pub mod fs {
     mod pos_read;
-    pub use self::pos_read::PosRead;
+    pub use pos_read::PosRead;
 
     mod read;
-    pub use self::read::{ReadPos, ReadSlice};
+    pub use read::{ReadPos, ReadSlice};
 
     /// Compatibility type aliases.
     pub mod rc {
@@ -91,11 +91,11 @@ pub mod fs {
 /// I/O extensions and utilities
 pub mod io {
     mod gather;
-    pub use self::gather::GatheringReader;
+    pub use gather::GatheringReader;
 }
 
 /// Random access memory utilities
 pub mod mem {
     mod handle;
-    pub use self::handle::{MemAdviseError, MemHandle, MemAdvice};
+    pub use handle::{MemAdviseError, MemHandle, MemAdvice};
 }