Auto merge of #7102 - ehuss:update-changelog, r=Eh2406

Update changelog.

CHANGELOG.md

@@ -1,29 +1,93 @@
 # Changelog
 
+## Cargo 1.38 (2019-11-26)
+[4c1fa54d...HEAD](https://github.com/rust-lang/cargo/compare/4c1fa54d...HEAD)
+
+### Added
+
+### Changed
+
+### Fixed
+- (Nightly only): Fixed exponential blowup when using CARGO_BUILD_PIPELINING.
+  [#7062](https://github.com/rust-lang/cargo/pull/7062)
+- Fixed using the wrong directory when updating git repositories when using
+  the `git-fetch-with-cli` config option, and the `GIT_DIR` environment
+  variable is set. This may happen when running cargo from git callbacks.
+  [#7082](https://github.com/rust-lang/cargo/pull/7082)
+
 ## Cargo 1.37 (2019-08-15)
-[c4fcfb72...HEAD](https://github.com/rust-lang/cargo/compare/c4fcfb72...HEAD)
+[c4fcfb72...4c1fa54d](https://github.com/rust-lang/cargo/compare/c4fcfb72...4c1fa54d)
 
 ### Added
-- Added `doctest` field to `cargo metadata` to determine if a target's documentation is tested.
+- Added `doctest` field to `cargo metadata` to determine if a target's
+  documentation is tested.
   [#6953](https://github.com/rust-lang/cargo/pull/6953)
   [#6965](https://github.com/rust-lang/cargo/pull/6965)
 - (Nightly only): Added [compiler message
   caching](https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#cache-messages).
   The `-Z cache-messages` flag makes cargo cache the compiler output so that
   future runs can redisplay previous warnings.
   [#6933](https://github.com/rust-lang/cargo/pull/6933)
+- 🔥 The [`cargo
+  vendor`](https://doc.rust-lang.org/nightly/cargo/commands/cargo-vendor.html)
+  command is now built-in to Cargo. This command may be used to create a local
+  copy of the sources of all dependencies.
+  [#6869](https://github.com/rust-lang/cargo/pull/6869)
+- 🔥 The "publish lockfile" feature is now stable. This feature will
+  automatically include the `Cargo.lock` file when a package is published if
+  it contains a binary executable target. By default, Cargo will ignore
+  `Cargo.lock` when installing a package. To force Cargo to use the
+  `Cargo.lock` file included in the published package, use `cargo install
+  --locked`. This may be useful to ensure that `cargo install` consistently
+  reproduces the same result. It may also be useful when a semver-incompatible
+  change is accidentally published to a dependency, providing a way to fall
+  back to a version that is known to work.
+  [#7026](https://github.com/rust-lang/cargo/pull/7026)
+- 🔥 The `default-run` feature has been stabilized. This feature allows you to
+  specify which binary executable to run by default with `cargo run` when a
+  package includes multiple binaries. Set the `default-run` key in the
+  `[package]` table in `Cargo.toml` to the name of the binary to use by
+  default.
+  [#7056](https://github.com/rust-lang/cargo/pull/7056)
 
 ### Changed
 - `cargo package` now verifies that build scripts do not create empty
   directories.
   [#6973](https://github.com/rust-lang/cargo/pull/6973)
+- A warning is now issued if `cargo doc` generates duplicate outputs, which
+  causes files to be randomly stomped on. This may happen for a variety of
+  reasons (renamed dependencies, multiple versions of the same package,
+  packages with renamed libraries, etc.). This is a known bug, which needs
+  more work to handle correctly.
+  [#6998](https://github.com/rust-lang/cargo/pull/6998)
+- Enabling a dependency's feature with `--features foo/bar` will no longer
+  compile the current crate with the `foo` feature if `foo` is not an optional
+  dependency.
+  [#7010](https://github.com/rust-lang/cargo/pull/7010)
+- If `--remap-path-prefix` is passed via RUSTFLAGS, it will no longer affect
+  the filename metadata hash.
+  [#6966](https://github.com/rust-lang/cargo/pull/6966)
+- libgit2 has been updated to 0.28.2, which Cargo uses to access git
+  repositories. This brings in hundreds of changes and fixes since it was last
+  updated in November.
+  [#7018](https://github.com/rust-lang/cargo/pull/7018)
+- Cargo now supports absolute paths in the dep-info files generated by rustc.
+  This is laying the groundwork for [tracking
+  binaries](https://github.com/rust-lang/rust/pull/61727), such as libstd, for
+  rebuild detection. (Note: this contains a known bug.)
+  [#7030](https://github.com/rust-lang/cargo/pull/7030)
+- (Nightly only): `-Z mtime-on-use` no longer touches intermediate artifacts.
+  [#7050](https://github.com/rust-lang/cargo/pull/7050)
 
 ### Fixed
 - Fixed how zsh completions fetch the list of commands.
   [#6956](https://github.com/rust-lang/cargo/pull/6956)
 - "+ debuginfo" is no longer printed in the build summary when `debug` is set
   to 0.
   [#6971](https://github.com/rust-lang/cargo/pull/6971)
+- Fixed `cargo doc` with an example configured with `doc = true` to document
+  correctly.
+  [#7023](https://github.com/rust-lang/cargo/pull/7023)
 
 ## Cargo 1.36 (2019-07-04)
 [6f3e9c36...c4fcfb72](https://github.com/rust-lang/cargo/compare/6f3e9c36...c4fcfb72)