Enable new behavior of `--feature`
So far, the feedback on https://internals.rust-lang.org/t/help-us-test-the-breaking-bug-fix-to-cargo-features/7317 has been positive, so here's a PR to try this in nightly.
Note that the logic is slightly tweak for the case `cargo build -p not-a-workspace-member`: we want not only to resolve all ws members in this case, but to enable all of their features as well!
As a sanity check, this seems to be forward compatible with further improvements to features:
1) when we solve the grand bug of features being unified across the whole workspace, `cargo build -p not-a-member` would hopefully just work without additional contortions.
2) we might add a way to specify features per package, like `cargo build -p foo -p bar --features "foo/serde bar/serde"`
cargotest: Fix `with_*_does_not_contain` to support `[..]` and macro matching.
I changed it so that it is essentially the opposite of `with_*_contains` to keep it symmetric.
Any in-flight PRs using the old style will need to be updated (else they will incorrectly silently pass). Alternatively, we could rename the method to avoid that.
The following tests contained brackets, so they were not checking what they thought they were checking. I did a cursory look at them, but perhaps someone else could double-check that they make sense. Asserting what *doesn't* happen can be tricky since there is an infinite number of things that won't happen. Preferably a test would assert that it appears in one scenario and not another (like `incremental_profile` does), but some of them don't or can't.
```
build::incremental_profile
build::incremental_config
build::cargo_compile_with_workspace_excluded
build::build_all_exclude
build::targets_selected_default
check::targets_selected_default
check::check_filters
rustc::targets_selected_default
rustc_info_cache::rustc_info_cache
warn_on_failure::no_warning_on_bin_failure
warn_on_failure::warning_on_lib_failure
```
BTW, would you be interested in a PR that adds some documentation to `cargotest`?
I've discovered things I didn't know where there. I think some docstrings on some of the methods, and a short guide for new contributors would be helpful.
Rustc cache
This implements rustc caching, to speed-up no-op builds.
The cache is per-project, and stored in `target` directory. To implement this, I had to move `rustc` from `Config` down to `BuildConfig`.
closes https://github.com/rust-lang/cargo/issues/5315
Historically, feature-related flags like `--all-features`,
`--no-default-features` and `--features` operated on the *current*
package. That is, `cargo --package foo --feature feat` would activate
`feat` for the package at the current working directory, and not for the
`foo` package. `-Z package-features` flag implements the more obvious
semantics for this combination of flags. This changes behavior, and that
is why we want to start with an unstable opt-in. The changes are:
* `--feature` flag affects the selected package. It is an error to
specify `--feature` with more than a single `-p`, or with `-p` outside
workspace (the latter could work in theory, but would be hard to
implement).
* `--all-features` and `--no-default-features` affect all selected
packages, and not the one at cwd.
* The package in `cwd` is not implicitly enabled when doing feature
selection. That is, `cargo build -Z package-features -p foo` could
select *less* features for various packages than `cargo build -p foo`.
This commit extends the fix in #5288 by moving the logic added farther up in the
loop over package dependencies. This means that we won't recursively look at
optional/dev path dependencies which aren't members of the workspace. This
should fix the new issue that came up in #5257Closes#5257
Less aggressively poison sources on builds
Discovered in #5257 the changes in #5215 were slightly too aggressively
poisoning sources to require updates, thinking that a manifest changed when it
actually hadn't.
Non-workspace-member path dependencies with optional/dev-dependencies
don't show up in the lock file, so the previous logic would recognize this and
think that the dependency missing from the lock file was just added and would
require a registry update.
The fix in this commit effectively just skips all of these dependencies in
non-workspace members. This means that this will be slightly buggy if an
optional dependency that's activated is added, but that's hopefully something we
can tackle later.
Closes#5257
Discovered in #5257 the changes in #5215 were slightly too aggressively
poisoning sources to require updates, thinking that a manifest changed when it
actually hadn't.
Non-workspace-member path dependencies with optional/dev-dependencies
don't show up in the lock file, so the previous logic would recognize this and
think that the dependency missing from the lock file was just added and would
require a registry update.
The fix in this commit effectively just skips all of these dependencies in
non-workspace members. This means that this will be slightly buggy if an
optional dependency that's activated is added, but that's hopefully something we
can tackle later.
Closes#5257
cargo_new: remove redundant leading new lines from ignore files
Only add a leading new line in `.gitignore`/`.hgignore`/`.ignore` files when
the file existed before `cargo new`.
Fixes#5265.
fix#2773 with new precise encode
Changed the precise encode from <pkg>=<precise> to <pkg>=<present_version>-><future_version> in order to check the correct requirements.
cc @lu-zero
