Merge branch 'master' into license-field-as-environment-variable

CHANGELOG.md

@@ -1,7 +1,40 @@
 # Changelog
 
+## Cargo 1.46 (2020-08-27)
+[9fcb8c1d...HEAD](https://github.com/rust-lang/cargo/compare/9fcb8c1d...HEAD)
+
+### Added
+
+### Changed
+- A warning is now displayed if a git dependency includes a `#` fragment in
+  the URL. This was potentially confusing because Cargo itself displays git
+  URLs with this syntax, but it does not have any meaning outside of the
+  `Cargo.lock` file, and would not work properly.
+  [#8297](https://github.com/rust-lang/cargo/pull/8297)
+
+### Fixed
+- Fixed a rare situation where an update to `Cargo.lock` failed once, but then
+  subsequent runs allowed it proceed.
+  [#8274](https://github.com/rust-lang/cargo/pull/8274)
+- Removed assertion that Windows dylibs must have a `.dll` extension. Some
+  custom JSON spec targets may change the extension.
+  [#8310](https://github.com/rust-lang/cargo/pull/8310)
+- Updated libgit2, which brings in a fix for zlib errors for some remote
+  git servers like googlesource.com.
+  [#8320](https://github.com/rust-lang/cargo/pull/8320)
+
+### Nightly only
+- Added `-Zrustdoc-map` feature which provides external mappings for rustdoc
+  (such as https://docs.rs/ links).
+  [docs](https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#rustdoc-map)
+  [#8287](https://github.com/rust-lang/cargo/pull/8287)
+- Fixed feature calculation when a proc-macro is declared in `Cargo.toml` with
+  an underscore (like `proc_macro = true`).
+  [#8319](https://github.com/rust-lang/cargo/pull/8319)
+
+
 ## Cargo 1.45 (2020-07-16)
-[ebda5065e...HEAD](https://github.com/rust-lang/cargo/compare/ebda5065e...HEAD)
+[ebda5065e...rust-1.45.0](https://github.com/rust-lang/cargo/compare/ebda5065...rust-1.45.0)
 
 ### Added
 
@@ -29,11 +62,105 @@
   directory. Some obscure scenarios can cause an old dylib to be referenced
   between builds, and this ensures that all the latest copies are used.
   [#8139](https://github.com/rust-lang/cargo/pull/8139)
+- `package.exclude` can now match directory names. If a directory is
+  specified, the entire directory will be excluded, and Cargo will not attempt
+  to inspect it further. Previously Cargo would try to check every file in the
+  directory which could cause problems if the directory contained unreadable
+  files.
+  [#8095](https://github.com/rust-lang/cargo/pull/8095)
+- When packaging with `cargo publish` or `cargo package`, Cargo can use git to
+  guide its decision on which files to include. Previously this git-based
+  logic required a `Cargo.toml` file to exist at the root of the repository.
+  This is no longer required, so Cargo will now use git-based guidance even if
+  there is not a `Cargo.toml` in the root of the repository.
+  [#8095](https://github.com/rust-lang/cargo/pull/8095)
+- While unpacking a crate on Windows, if it fails to write a file because the
+  file is a reserved Windows filename (like "aux.rs"), Cargo will display an
+  extra message to explain why it failed.
+  [#8136](https://github.com/rust-lang/cargo/pull/8136)
+- Failures to set mtime on files are now ignored. Some filesystems did not
+  support this.
+  [#8185](https://github.com/rust-lang/cargo/pull/8185)
+- Certain classes of git errors will now recommend enabling
+  `net.git-fetch-with-cli`.
+  [#8166](https://github.com/rust-lang/cargo/pull/8166)
+- When doing an LTO build, Cargo will now instruct rustc not to perform
+  codegen when possible. This may result in a faster build and use less disk
+  space. Additionally, for non-LTO builds, Cargo will instruct rustc to not
+  embed LLVM bitcode in libraries, which should decrease their size.
+  [#8192](https://github.com/rust-lang/cargo/pull/8192)
+  [#8226](https://github.com/rust-lang/cargo/pull/8226)
+  [#8254](https://github.com/rust-lang/cargo/pull/8254)
+- The implementation for `cargo clean -p` has been rewritten so that it can
+  more accurately remove the files for a specific package.
+  [#8210](https://github.com/rust-lang/cargo/pull/8210)
+- The way Cargo computes the outputs from a build has been rewritten to be
+  more complete and accurate. Newly tracked files will be displayed in JSON
+  messages, and may be uplifted to the output directory in some cases. Some of
+  the changes from this are:
+
+  - `.exp` export files on Windows MSVC dynamic libraries are now tracked.
+  - Proc-macros on Windows track import/export files.
+  - All targets (like tests, etc.) that generate separate debug files
+    (pdb/dSYM) are tracked.
+  - Added .map files for wasm32-unknown-emscripten.
+  - macOS dSYM directories are tracked for all dynamic libraries
+    (dylib/cdylib/proc-macro) and for build scripts.
+
+  There are a variety of other changes as a consequence of this:
+
+  - Binary examples on Windows MSVC with a hyphen will now show up twice in
+    the examples directory (`foo_bar.exe` and `foo-bar.exe`). Previously Cargo
+    just renamed the file instead of hard-linking it.
+  - Example libraries now follow the same rules for hyphen/underscore
+    translation as normal libs (they will now use underscores).
+
+  [#8210](https://github.com/rust-lang/cargo/pull/8210)
+- Cargo attempts to scrub any secrets from the debug log for HTTP debugging.
+  [#8222](https://github.com/rust-lang/cargo/pull/8222)
+- Context has been added to many of Cargo's filesystem operations, so that
+  error messages now provide more information, such as the path that caused
+  the problem.
+  [#8232](https://github.com/rust-lang/cargo/pull/8232)
+- Several commands now ignore the error if stdout or stderr is closed while it
+  is running. For example `cargo install --list | grep -q cargo-fuzz` would
+  previously sometimes panic because `grep -q` may close stdout before the
+  command finishes. Regular builds continue to fail if stdout or stderr is
+  closed, matching the behavior of many other build systems.
+  [#8236](https://github.com/rust-lang/cargo/pull/8236)
+- If `cargo install` is given an exact version, like `--version=1.2.3`, it
+  will now avoid updating the index if that version is already installed, and
+  exit quickly indicating it is already installed.
+  [#8022](https://github.com/rust-lang/cargo/pull/8022)
+- Changes to the `[patch]` section will now attempt to automatically update
+  `Cargo.lock` to the new version. It should now also provide better error
+  messages for the rare cases where it is unable to automatically update.
+  [#8248](https://github.com/rust-lang/cargo/pull/8248)
 
 ### Fixed
 - Fixed copying Windows `.pdb` files to the output directory when the filename
   contained dashes.
   [#8123](https://github.com/rust-lang/cargo/pull/8123)
+- Fixed error where Cargo would fail when scanning if a package is inside a
+  git repository when any of its ancestor paths is a symlink.
+  [#8186](https://github.com/rust-lang/cargo/pull/8186)
+- Fixed `cargo update` with an unused `[patch]` so that it does not get
+  stuck and refuse to update.
+  [#8243](https://github.com/rust-lang/cargo/pull/8243)
+- Fixed a situation where Cargo would hang if stderr is closed, and the
+  compiler generated a large number of messages.
+  [#8247](https://github.com/rust-lang/cargo/pull/8247)
+- Fixed backtraces on macOS not showing filenames or line numbers. As a
+  consequence of this, binary executables on apple targets do not include a
+  hash in the filename in Cargo's cache. This means Cargo can only track one
+  copy, so if you switch features or rustc versions, Cargo will need to
+  rebuild the executable.
+  [#8329](https://github.com/rust-lang/cargo/pull/8329)
+  [#8335](https://github.com/rust-lang/cargo/pull/8335)
+- Fixed fingerprinting when using lld on Windows with a dylib. Cargo was
+  erroneously thinking the dylib was never fresh.
+  [#8290](https://github.com/rust-lang/cargo/pull/8290)
+  [#8335](https://github.com/rust-lang/cargo/pull/8335)
 
 ### Nightly only
 - Fixed passing the full path for `--target` to `rustdoc` when using JSON spec
@@ -44,9 +171,22 @@
 - Added new `resolver` field to `Cargo.toml` to opt-in to the new feature
   resolver.
   [#8129](https://github.com/rust-lang/cargo/pull/8129)
+- `-Zbuild-std` no longer treats std dependencies as "local". This means that
+  it won't use incremental compilation for those dependencies, removes them
+  from dep-info files, and caps lints at "allow".
+  [#8177](https://github.com/rust-lang/cargo/pull/8177)
+- Added `-Zmultitarget` which allows multiple `--target` flags to build the
+  same thing for multiple targets at once.
+  [docs](https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#multitarget)
+  [#8167](https://github.com/rust-lang/cargo/pull/8167)
+- Added `strip` option to the profile to remove symbols and debug information.
+  [docs](https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#profile-strip-option)
+  [#8246](https://github.com/rust-lang/cargo/pull/8246)
+- Fixed panic with `cargo tree --target=all -Zfeatures=all`.
+  [#8269](https://github.com/rust-lang/cargo/pull/8269)
 
 ## Cargo 1.44 (2020-06-04)
-[bda50510...ebda5065e](https://github.com/rust-lang/cargo/compare/bda50510...ebda5065e)
+[bda50510...rust-1.44.0](https://github.com/rust-lang/cargo/compare/bda50510...rust-1.44.0)
 
 ### Added
 - 🔥 Added the `cargo tree` command.
@@ -96,6 +236,10 @@
   [#8090](https://github.com/rust-lang/cargo/pull/8090)
 - Added a certain class of HTTP2 errors as "spurious" that will get retried.
   [#8102](https://github.com/rust-lang/cargo/pull/8102)
+- Allow `cargo package --list` to succeed, even if there are other validation
+  errors (such as `Cargo.lock` generation problem, or missing dependencies).
+  [#8175](https://github.com/rust-lang/cargo/pull/8175)
+  [#8215](https://github.com/rust-lang/cargo/pull/8215)
 
 ### Fixed
 - Cargo no longer buffers excessive amounts of compiler output in memory.
@@ -115,6 +259,8 @@
 - Protect against some (unknown) situations where Cargo could panic when the
   system monotonic clock doesn't appear to be monotonic.
   [#8114](https://github.com/rust-lang/cargo/pull/8114)
+- Fixed panic with `cargo clean -p` if the package has a build script.
+  [#8216](https://github.com/rust-lang/cargo/pull/8216)
 
 ### Nightly only
 - Fixed panic with new feature resolver and required-features.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cargo"
-version = "0.46.0"
+version = "0.47.0"
 edition = "2018"
 authors = ["Yehuda Katz <wycats@gmail.com>",
            "Carl Lerche <me@carllerche.com>",

crates/cargo-platform/src/error.rs

@@ -6,6 +6,7 @@ pub struct ParseError {
     orig: String,
 }
 
+#[non_exhaustive]
 #[derive(Debug)]
 pub enum ParseErrorKind {
     UnterminatedString,
@@ -17,9 +18,6 @@ pub enum ParseErrorKind {
     IncompleteExpr(&'static str),
     UnterminatedExpression(String),
     InvalidTarget(String),
-
-    #[doc(hidden)]
-    __Nonexhaustive,
 }
 
 impl fmt::Display for ParseError {
@@ -53,7 +51,6 @@ impl fmt::Display for ParseErrorKind {
                 write!(f, "unexpected content `{}` found after cfg expression", s)
             }
             InvalidTarget(s) => write!(f, "invalid target specifier: {}", s),
-            __Nonexhaustive => unreachable!(),
         }
     }
 }

src/cargo/core/compiler/compilation.rs

@@ -151,17 +151,15 @@ impl<'cfg> Compilation<'cfg> {
             self.rustc_process.clone()
         };
 
-        self.fill_env(rustc, &unit.pkg, unit.kind, true)
+        let cmd = fill_rustc_tool_env(rustc, unit);
+        self.fill_env(cmd, &unit.pkg, unit.kind, true)
     }
 
     /// See `process`.
     pub fn rustdoc_process(&self, unit: &Unit) -> CargoResult<ProcessBuilder> {
-        let mut p = self.fill_env(
-            process(&*self.config.rustdoc()?),
-            &unit.pkg,
-            unit.kind,
-            true,
-        )?;
+        let rustdoc = process(&*self.config.rustdoc()?);
+        let cmd = fill_rustc_tool_env(rustdoc, unit);
+        let mut p = self.fill_env(cmd, &unit.pkg, unit.kind, true)?;
         if unit.target.edition() != Edition::Edition2015 {
             p.arg(format!("--edition={}", unit.target.edition()));
         }
@@ -299,6 +297,16 @@ impl<'cfg> Compilation<'cfg> {
     }
 }
 
+/// Prepares a rustc_tool process with additional environment variables
+/// that are only relevant in a context that has a unit
+fn fill_rustc_tool_env(mut cmd: ProcessBuilder, unit: &Unit) -> ProcessBuilder {
+    if unit.target.is_bin() {
+        cmd.env("CARGO_BIN_NAME", unit.target.name());
+    }
+    cmd.env("CARGO_CRATE_NAME", unit.target.crate_name());
+    cmd
+}
+
 fn pre_version_component(v: &Version) -> String {
     if v.pre.is_empty() {
         return String::new();

src/cargo/core/compiler/context/compilation_files.rs

@@ -608,6 +608,12 @@ fn should_use_metadata(bcx: &BuildContext<'_, '_>, unit: &Unit) -> bool {
     // - wasm32 executables: When using emscripten, the path to the .wasm file
     //   is embedded in the .js file, so we don't want the hash in there.
     //   TODO: Is this necessary for wasm32-unknown-unknown?
+    // - apple executables: The executable name is used in the dSYM directory
+    //   (such as `target/debug/foo.dSYM/Contents/Resources/DWARF/foo-64db4e4bf99c12dd`).
+    //   Unfortunately this causes problems with our current backtrace
+    //   implementation which looks for a file matching the exe name exactly.
+    //   See https://github.com/rust-lang/rust/issues/72550#issuecomment-638501691
+    //   for more details.
     //
     // This is only done for local packages, as we don't expect to export
     // dependencies.
@@ -622,7 +628,8 @@ fn should_use_metadata(bcx: &BuildContext<'_, '_>, unit: &Unit) -> bool {
     if (unit.target.is_dylib()
         || unit.target.is_cdylib()
         || (unit.target.is_executable() && short_name.starts_with("wasm32-"))
-        || (unit.target.is_executable() && short_name.contains("msvc")))
+        || (unit.target.is_executable() && short_name.contains("msvc"))
+        || (unit.target.is_executable() && short_name.contains("-apple-")))
         && unit.pkg.package_id().source_id().is_path()
         && env::var("__CARGO_DEFAULT_LIB_METADATA").is_err()
     {

src/cargo/core/compiler/fingerprint.rs

@@ -894,7 +894,7 @@ impl Fingerprint {
             if a.name != b.name {
                 let e = format_err!("`{}` != `{}`", a.name, b.name)
                     .context("unit dependency name changed");
-                return Err(e.into());
+                return Err(e);
             }
 
             if a.fingerprint.hash() != b.fingerprint.hash() {
@@ -906,7 +906,7 @@ impl Fingerprint {
                     b.fingerprint.hash()
                 )
                 .context("unit dependency information changed");
-                return Err(e.into());
+                return Err(e);
             }
         }
 

src/cargo/core/compiler/rustdoc.rs

@@ -79,7 +79,7 @@ pub fn add_root_urls(
         return Ok(());
     }
     let map = config.doc_extern_map()?;
-    if map.registries.len() == 0 && map.std.is_none() {
+    if map.registries.is_empty() && map.std.is_none() {
         // Skip doing unnecessary work.
         return Ok(());
     }
@@ -90,13 +90,13 @@ pub fn add_root_urls(
         .keys()
         .filter_map(|name| {
             if let Ok(index_url) = config.get_registry_index(name) {
-                return Some((name, index_url));
+                Some((name, index_url))
             } else {
                 log::warn!(
                     "`doc.extern-map.{}` specifies a registry that is not defined",
                     name
                 );
-                return None;
+                None
             }
         })
         .collect();

src/cargo/core/registry.rs

@@ -294,7 +294,7 @@ impl<'cfg> PackageRegistry<'cfg> {
                     .expect("loaded source not present");
                 let summaries = source.query_vec(dep)?;
                 let (summary, should_unlock) =
-                    summary_for_patch(orig_patch, &locked, summaries, source).chain_err(|| {
+                    summary_for_patch(orig_patch, locked, summaries, source).chain_err(|| {
                         format!(
                             "patch for `{}` in `{}` failed to resolve",
                             orig_patch.package_name(),

src/cargo/core/resolver/resolve.rs

@@ -119,10 +119,9 @@ impl Resolve {
 
     pub fn register_used_patches(&mut self, patches: &[Summary]) {
         for summary in patches {
-            if self.iter().any(|id| id == summary.package_id()) {
-                continue;
-            }
-            self.unused_patches.push(summary.package_id());
+            if !self.graph.contains(&summary.package_id()) {
+                self.unused_patches.push(summary.package_id())
+            };
         }
     }
 

src/cargo/core/workspace.rs

@@ -145,7 +145,16 @@ impl<'cfg> Workspace<'cfg> {
     pub fn new(manifest_path: &Path, config: &'cfg Config) -> CargoResult<Workspace<'cfg>> {
         let mut ws = Workspace::new_default(manifest_path.to_path_buf(), config);
         ws.target_dir = config.target_dir()?;
-        ws.root_manifest = ws.find_root(manifest_path)?;
+
+        if manifest_path.is_relative() {
+            anyhow::bail!(
+                "manifest_path:{:?} is not an absolute path. Please provide an absolute path.",
+                manifest_path
+            )
+        } else {
+            ws.root_manifest = ws.find_root(manifest_path)?;
+        }
+
         ws.find_members()?;
         ws.resolve_behavior = match ws.root_maybe() {
             MaybePackage::Package(p) => p.manifest().resolve_behavior(),
@@ -863,7 +872,7 @@ impl<'cfg> Workspace<'cfg> {
                     let err = anyhow::format_err!("{}", warning.message);
                     let cx =
                         anyhow::format_err!("failed to parse manifest at `{}`", path.display());
-                    return Err(err.context(cx).into());
+                    return Err(err.context(cx));
                 } else {
                     let msg = if self.root_manifest.is_none() {
                         warning.message.to_string()

src/cargo/lib.rs

@@ -28,7 +28,7 @@
 #![allow(clippy::unneeded_field_pattern)]
 // false positives in target-specific code, for details see
 // https://github.com/rust-lang/cargo/pull/7251#pullrequestreview-274914270
-#![allow(clippy::identity_conversion)]
+#![allow(clippy::useless_conversion)]
 
 use crate::core::shell::Verbosity::Verbose;
 use crate::core::Shell;