feat(cli): Add --ignore-rust-version to update/generate-lockfile

src/bin/cargo/commands/generate_lockfile.rs

@@ -7,12 +7,23 @@ pub fn cli() -> Command {
         .about("Generate the lockfile for a package")
         .arg_silent_suggestion()
         .arg_manifest_path()
+        .arg_ignore_rust_version_with_help(
+            "Ignore `rust-version` specification in packages (unstable)",
+        )
         .after_help(color_print::cstr!(
             "Run `<cyan,bold>cargo help generate-lockfile</>` for more detailed information.\n"
         ))
 }
 
 pub fn exec(gctx: &mut GlobalContext, args: &ArgMatches) -> CliResult {
+    if args.honor_rust_version().is_some() {
+        gctx.cli_unstable().fail_if_stable_opt_custom_z(
+            "--ignore-rust-version",
+            9930,
+            "msrv-policy",
+            gctx.cli_unstable().msrv_policy,
+        )?;
+    }
     let ws = args.workspace(gctx)?;
     ops::generate_lockfile(&ws)?;
     Ok(())

src/bin/cargo/commands/update.rs

@@ -42,12 +42,23 @@ pub fn cli() -> Command {
                 .help_heading(heading::PACKAGE_SELECTION),
         )
         .arg_manifest_path()
+        .arg_ignore_rust_version_with_help(
+            "Ignore `rust-version` specification in packages (unstable)",
+        )
         .after_help(color_print::cstr!(
             "Run `<cyan,bold>cargo help update</>` for more detailed information.\n"
         ))
 }
 
 pub fn exec(gctx: &mut GlobalContext, args: &ArgMatches) -> CliResult {
+    if args.honor_rust_version().is_some() {
+        gctx.cli_unstable().fail_if_stable_opt_custom_z(
+            "--ignore-rust-version",
+            9930,
+            "msrv-policy",
+            gctx.cli_unstable().msrv_policy,
+        )?;
+    }
     let ws = args.workspace(gctx)?;
 
     if args.is_present_with_zero_values("package") {

src/cargo/util/command_prelude.rs

@@ -352,13 +352,11 @@ pub trait CommandExt: Sized {
     }
 
     fn arg_ignore_rust_version(self) -> Self {
-        self._arg(
-            flag(
-                "ignore-rust-version",
-                "Ignore `rust-version` specification in packages",
-            )
-            .help_heading(heading::MANIFEST_OPTIONS),
-        )
+        self.arg_ignore_rust_version_with_help("Ignore `rust-version` specification in packages")
+    }
+
+    fn arg_ignore_rust_version_with_help(self, help: &'static str) -> Self {
+        self._arg(flag("ignore-rust-version", help).help_heading(heading::MANIFEST_OPTIONS))
     }
 
     fn arg_future_incompat_report(self) -> Self {

src/doc/man/cargo-generate-lockfile.md

@@ -30,6 +30,8 @@ lockfile and has more options for controlling update behavior.
 {{#options}}
 {{> options-manifest-path }}
 
+{{> options-ignore-rust-version }}
+
 {{> options-locked }}
 {{/options}}
 

src/doc/man/cargo-update.md

@@ -75,6 +75,8 @@ Displays what would be updated, but doesn't actually write the lockfile.
 
 {{> options-manifest-path }}
 
+{{> options-ignore-rust-version }}
+
 {{> options-locked }}
 
 {{/options}}

src/doc/man/generated_txt/cargo-generate-lockfile.txt

@@ -46,6 +46,9 @@ OPTIONS
            Path to the Cargo.toml file. By default, Cargo searches for the
            Cargo.toml file in the current directory or any parent directory.
 
+       --ignore-rust-version
+           Ignore rust-version specification in packages.
+
        --locked
            Asserts that the exact same dependencies and versions are used as
            when the existing Cargo.lock file was originally generated. Cargo

src/doc/man/generated_txt/cargo-update.txt

@@ -85,6 +85,9 @@ OPTIONS
            Path to the Cargo.toml file. By default, Cargo searches for the
            Cargo.toml file in the current directory or any parent directory.
 
+       --ignore-rust-version
+           Ignore rust-version specification in packages.
+
        --locked
            Asserts that the exact same dependencies and versions are used as
            when the existing Cargo.lock file was originally generated. Cargo

src/doc/src/commands/cargo-generate-lockfile.md

@@ -58,6 +58,10 @@ terminal.</li>
 <code>Cargo.toml</code> file in the current directory or any parent directory.</dd>
 
 
+<dt class="option-term" id="option-cargo-generate-lockfile---ignore-rust-version"><a class="option-anchor" href="#option-cargo-generate-lockfile---ignore-rust-version"></a><code>--ignore-rust-version</code></dt>
+<dd class="option-desc">Ignore <code>rust-version</code> specification in packages.</dd>
+
+
 <dt class="option-term" id="option-cargo-generate-lockfile---locked"><a class="option-anchor" href="#option-cargo-generate-lockfile---locked"></a><code>--locked</code></dt>
 <dd class="option-desc">Asserts that the exact same dependencies and versions are used as when the
 existing <code>Cargo.lock</code> file was originally generated. Cargo will exit with an

src/doc/src/commands/cargo-update.md

@@ -100,6 +100,10 @@ terminal.</li>
 <code>Cargo.toml</code> file in the current directory or any parent directory.</dd>
 
 
+<dt class="option-term" id="option-cargo-update---ignore-rust-version"><a class="option-anchor" href="#option-cargo-update---ignore-rust-version"></a><code>--ignore-rust-version</code></dt>
+<dd class="option-desc">Ignore <code>rust-version</code> specification in packages.</dd>
+
+
 <dt class="option-term" id="option-cargo-update---locked"><a class="option-anchor" href="#option-cargo-update---locked"></a><code>--locked</code></dt>
 <dd class="option-desc">Asserts that the exact same dependencies and versions are used as when the
 existing <code>Cargo.lock</code> file was originally generated. Cargo will exit with an

src/etc/man/cargo-generate-lockfile.1

@@ -62,6 +62,11 @@ Path to the \fBCargo.toml\fR file. By default, Cargo searches for the
 \fBCargo.toml\fR file in the current directory or any parent directory.
 .RE
 .sp
+\fB\-\-ignore\-rust\-version\fR
+.RS 4
+Ignore \fBrust\-version\fR specification in packages.
+.RE
+.sp
 \fB\-\-locked\fR
 .RS 4
 Asserts that the exact same dependencies and versions are used as when the

src/etc/man/cargo-update.1

@@ -107,6 +107,11 @@ Path to the \fBCargo.toml\fR file. By default, Cargo searches for the
 \fBCargo.toml\fR file in the current directory or any parent directory.
 .RE
 .sp
+\fB\-\-ignore\-rust\-version\fR
+.RS 4
+Ignore \fBrust\-version\fR specification in packages.
+.RE
+.sp
 \fB\-\-locked\fR
 .RS 4
 Asserts that the exact same dependencies and versions are used as when the

tests/testsuite/rust_version.rs

@@ -504,6 +504,128 @@ fn workspace_with_mixed_rust_version() {
         .run();
 }
 
+#[cargo_test]
+fn generate_lockfile_msrv_resolve() {
+    Package::new("bar", "1.5.0")
+        .rust_version("1.55.0")
+        .file("src/lib.rs", "fn other_stuff() {}")
+        .publish();
+    Package::new("bar", "1.6.0")
+        .rust_version("1.65.0")
+        .file("src/lib.rs", "fn other_stuff() {}")
+        .publish();
+
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+            [package]
+            name = "foo"
+            version = "0.0.1"
+            edition = "2015"
+            authors = []
+            rust-version = "1.60.0"
+            [dependencies]
+            bar = "1.0.0"
+        "#,
+        )
+        .file("src/main.rs", "fn main(){}")
+        .build();
+
+    p.cargo("generate-lockfile --ignore-rust-version")
+        .with_status(101)
+        .with_stderr(
+            "\
+[ERROR] the `--ignore-rust-version` flag is unstable, and only available on the nightly channel of Cargo, but this is the `stable` channel
+See https://doc.rust-lang.org/book/appendix-07-nightly-rust.html for more information about Rust release channels.
+See https://github.com/rust-lang/cargo/issues/9930 for more information about the `--ignore-rust-version` flag.
+",
+        )
+        .run();
+    p.cargo("generate-lockfile --ignore-rust-version")
+        .arg("-Zmsrv-policy")
+        .masquerade_as_nightly_cargo(&["msrv-policy"])
+        .with_stderr(
+            "\
+[UPDATING] `dummy-registry` index
+[LOCKING] 2 packages
+",
+        )
+        .run();
+    p.cargo("generate-lockfile")
+        .arg("-Zmsrv-policy")
+        .masquerade_as_nightly_cargo(&["msrv-policy"])
+        .with_stderr(
+            "\
+[UPDATING] `dummy-registry` index
+[LOCKING] 2 packages
+[ADDING] bar v1.5.0 (latest: v1.6.0)
+",
+        )
+        .run();
+}
+
+#[cargo_test]
+fn update_msrv_resolve() {
+    Package::new("bar", "1.5.0")
+        .rust_version("1.55.0")
+        .file("src/lib.rs", "fn other_stuff() {}")
+        .publish();
+    Package::new("bar", "1.6.0")
+        .rust_version("1.65.0")
+        .file("src/lib.rs", "fn other_stuff() {}")
+        .publish();
+
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+            [package]
+            name = "foo"
+            version = "0.0.1"
+            edition = "2015"
+            authors = []
+            rust-version = "1.60.0"
+            [dependencies]
+            bar = "1.0.0"
+        "#,
+        )
+        .file("src/main.rs", "fn main(){}")
+        .build();
+
+    p.cargo("update")
+        .arg("-Zmsrv-policy")
+        .masquerade_as_nightly_cargo(&["msrv-policy"])
+        .with_stderr(
+            "\
+[UPDATING] `dummy-registry` index
+[LOCKING] 2 packages
+[ADDING] bar v1.5.0 (latest: v1.6.0)
+",
+        )
+        .run();
+    p.cargo("update --ignore-rust-version")
+        .with_status(101)
+        .with_stderr(
+            "\
+[ERROR] the `--ignore-rust-version` flag is unstable, and only available on the nightly channel of Cargo, but this is the `stable` channel
+See https://doc.rust-lang.org/book/appendix-07-nightly-rust.html for more information about Rust release channels.
+See https://github.com/rust-lang/cargo/issues/9930 for more information about the `--ignore-rust-version` flag.
+",
+        )
+        .run();
+    p.cargo("update --ignore-rust-version")
+        .arg("-Zmsrv-policy")
+        .masquerade_as_nightly_cargo(&["msrv-policy"])
+        .with_stderr(
+            "\
+[UPDATING] `dummy-registry` index
+[UPDATING] bar v1.5.0 -> v1.6.0
+",
+        )
+        .run();
+}
+
 #[cargo_test]
 fn rust_version_older_than_edition() {
     project()