Improve error message for publish key restriction.

The existing error message didn't really recognize that `publish` can be a
list.

This also adds support for `publish = ["crates-io"]` to restrict publishing
to crates.io only.

src/cargo/ops/registry.rs

@@ -8,6 +8,7 @@ use std::{cmp, env};
 
 use crates_io::{NewCrate, NewCrateDependency, Registry};
 use curl::easy::{Easy, InfoType, SslOpt};
+use failure::{bail, format_err};
 use log::{log, Level};
 use url::percent_encoding::{percent_encode, QUERY_ENCODE_SET};
 
@@ -16,7 +17,7 @@ use crate::core::manifest::ManifestMetadata;
 use crate::core::source::Source;
 use crate::core::{Package, SourceId, Workspace};
 use crate::ops;
-use crate::sources::{RegistrySource, SourceConfigMap};
+use crate::sources::{RegistrySource, SourceConfigMap, CRATES_IO_REGISTRY};
 use crate::util::config::{self, Config};
 use crate::util::errors::{CargoResult, CargoResultExt};
 use crate::util::important_paths::find_root_manifest_for_wd;
@@ -48,14 +49,16 @@ pub fn publish(ws: &Workspace<'_>, opts: &PublishOpts<'_>) -> CargoResult<()> {
     let pkg = ws.current()?;
 
     if let Some(ref allowed_registries) = *pkg.publish() {
-        if !match opts.registry {
-            Some(ref registry) => allowed_registries.contains(registry),
-            None => false,
-        } {
-            failure::bail!(
-                "some crates cannot be published.\n\
-                 `{}` is marked as unpublishable",
-                pkg.name()
+        let reg_name = opts
+            .registry
+            .clone()
+            .unwrap_or_else(|| CRATES_IO_REGISTRY.to_string());
+        if !allowed_registries.contains(&reg_name) {
+            bail!(
+                "`{}` cannot be published.\n\
+                 The registry `{}` is not listed in the `publish` value in Cargo.toml.",
+                pkg.name(),
+                reg_name
             );
         }
     }
@@ -112,7 +115,7 @@ fn verify_dependencies(
     for dep in pkg.dependencies().iter() {
         if dep.source_id().is_path() {
             if !dep.specified_req() {
-                failure::bail!(
+                bail!(
                     "all path dependencies must have a version specified \
                      when publishing.\ndependency `{}` does not specify \
                      a version",
@@ -131,7 +134,7 @@ fn verify_dependencies(
                     .map(|u| u.host_str() == Some("crates.io"))
                     .unwrap_or(false);
                 if registry_src.is_default_registry() || is_crates_io {
-                    failure::bail!("crates cannot be published to crates.io with dependencies sourced from other\n\
+                    bail!("crates cannot be published to crates.io with dependencies sourced from other\n\
                            registries either publish `{}` on crates.io or pull it into this repository\n\
                            and specify it with a path and version\n\
                            (crate `{}` is pulled from {})",
@@ -140,7 +143,7 @@ fn verify_dependencies(
                           dep.source_id());
                 }
             } else {
-                failure::bail!(
+                bail!(
                     "crates cannot be published with dependencies sourced from \
                      a repository\neither publish `{}` as its own crate and \
                      specify a version as a dependency or pull it into this \
@@ -221,7 +224,7 @@ fn transmit(
     };
     if let Some(ref file) = *license_file {
         if fs::metadata(&pkg.root().join(file)).is_err() {
-            failure::bail!("the license file `{}` does not exist", file)
+            bail!("the license file `{}` does not exist", file)
         }
     }
 
@@ -357,7 +360,7 @@ pub fn registry(
             cfg.unwrap()
         };
         cfg.and_then(|cfg| cfg.api)
-            .ok_or_else(|| failure::format_err!("{} does not support API commands", sid))?
+            .ok_or_else(|| format_err!("{} does not support API commands", sid))?
     };
     let handle = http_handle(config)?;
     Ok((Registry::new_handle(api_host, token, handle), sid))
@@ -372,13 +375,13 @@ pub fn http_handle(config: &Config) -> CargoResult<Easy> {
 
 pub fn http_handle_and_timeout(config: &Config) -> CargoResult<(Easy, HttpTimeout)> {
     if config.frozen() {
-        failure::bail!(
+        bail!(
             "attempting to make an HTTP request, but --frozen was \
              specified"
         )
     }
     if !config.network_allowed() {
-        failure::bail!("can't make HTTP request in the offline mode")
+        bail!("can't make HTTP request in the offline mode")
     }
 
     // The timeout option for libcurl by default times out the entire transfer,
@@ -605,9 +608,9 @@ pub fn modify_owners(config: &Config, opts: &OwnersOptions) -> CargoResult<()> {
 
     if let Some(ref v) = opts.to_add {
         let v = v.iter().map(|s| &s[..]).collect::<Vec<_>>();
-        let msg = registry.add_owners(&name, &v).map_err(|e| {
-            failure::format_err!("failed to invite owners to crate {}: {}", name, e)
-        })?;
+        let msg = registry
+            .add_owners(&name, &v)
+            .map_err(|e| format_err!("failed to invite owners to crate {}: {}", name, e))?;
 
         config.shell().status("Owner", msg)?;
     }
@@ -658,7 +661,7 @@ pub fn yank(
     };
     let version = match version {
         Some(v) => v,
-        None => failure::bail!("a version must be specified to yank"),
+        None => bail!("a version must be specified to yank"),
     };
 
     let (mut registry, _) = registry(config, token, index, reg, true)?;

tests/testsuite/publish.rs

@@ -354,8 +354,8 @@ fn unpublishable_crate() {
         .with_status(101)
         .with_stderr(
             "\
-[ERROR] some crates cannot be published.
-`foo` is marked as unpublishable
+[ERROR] `foo` cannot be published.
+The registry `crates-io` is not listed in the `publish` value in Cargo.toml.
 ",
         )
         .run();
@@ -644,8 +644,8 @@ fn registry_not_in_publish_list() {
         .with_status(101)
         .with_stderr(
             "\
-[ERROR] some crates cannot be published.
-`foo` is marked as unpublishable
+[ERROR] `foo` cannot be published.
+The registry `alternative` is not listed in the `publish` value in Cargo.toml.
 ",
         )
         .run();
@@ -675,8 +675,8 @@ fn publish_empty_list() {
         .with_status(101)
         .with_stderr(
             "\
-[ERROR] some crates cannot be published.
-`foo` is marked as unpublishable
+[ERROR] `foo` cannot be published.
+The registry `alternative` is not listed in the `publish` value in Cargo.toml.
 ",
         )
         .run();
@@ -745,13 +745,47 @@ fn block_publish_no_registry() {
         .with_status(101)
         .with_stderr(
             "\
-[ERROR] some crates cannot be published.
-`foo` is marked as unpublishable
+[ERROR] `foo` cannot be published.
+The registry `alternative` is not listed in the `publish` value in Cargo.toml.
 ",
         )
         .run();
 }
 
+#[test]
+fn publish_with_crates_io_explicit() {
+    // Explicitly setting `crates-io` in the publish list.
+    registry::init();
+
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+            [project]
+            name = "foo"
+            version = "0.0.1"
+            authors = []
+            license = "MIT"
+            description = "foo"
+            publish = ["crates-io"]
+        "#,
+        )
+        .file("src/main.rs", "fn main() {}")
+        .build();
+
+    p.cargo("publish --registry alternative")
+        .with_status(101)
+        .with_stderr(
+            "\
+[ERROR] `foo` cannot be published.
+The registry `alternative` is not listed in the `publish` value in Cargo.toml.
+",
+        )
+        .run();
+
+    p.cargo("publish").run();
+}
+
 #[test]
 fn publish_with_select_features() {
     registry::init();