[beta] Backport cargo publish fixes

src/cargo/ops/cargo_compile.rs

@@ -174,13 +174,13 @@ impl Packages {
         };
         if specs.is_empty() {
             if ws.is_virtual() {
-                anyhow::bail!(
+                bail!(
                     "manifest path `{}` contains no package: The manifest is virtual, \
                      and the workspace has no members.",
                     ws.root().display()
                 )
             }
-            anyhow::bail!("no packages to compile")
+            bail!("no packages to compile")
         }
         Ok(specs)
     }

src/cargo/ops/registry.rs

@@ -23,6 +23,7 @@ use crate::core::resolver::CliFeatures;
 use crate::core::source::Source;
 use crate::core::{Package, SourceId, Workspace};
 use crate::ops;
+use crate::ops::Packages;
 use crate::sources::{RegistrySource, SourceConfigMap, CRATES_IO_DOMAIN, CRATES_IO_REGISTRY};
 use crate::util::config::{self, Config, SslVersionConfig, SslVersionConfigRange};
 use crate::util::errors::CargoResult;
@@ -90,7 +91,24 @@ pub struct PublishOpts<'cfg> {
 
 pub fn publish(ws: &Workspace<'_>, opts: &PublishOpts<'_>) -> CargoResult<()> {
     let specs = opts.to_publish.to_package_id_specs(ws)?;
+    if specs.len() > 1 {
+        bail!("the `-p` argument must be specified to select a single package to publish")
+    }
+    if Packages::Default == opts.to_publish && ws.is_virtual() {
+        bail!("the `-p` argument must be specified in the root of a virtual workspace")
+    }
+    let member_ids = ws.members().map(|p| p.package_id());
+    // Check that the spec matches exactly one member.
+    specs[0].query(member_ids)?;
     let mut pkgs = ws.members_with_features(&specs, &opts.cli_features)?;
+    // In `members_with_features_old`, it will add "current" package (determined by the cwd)
+    // So we need filter
+    pkgs = pkgs
+        .into_iter()
+        .filter(|(m, _)| specs.iter().any(|spec| spec.matches(m.package_id())))
+        .collect();
+    // Double check. It is safe theoretically, unless logic has updated.
+    assert_eq!(pkgs.len(), 1);
 
     let (pkg, cli_features) = pkgs.pop().unwrap();