Support glob syntax in workspace members

src/cargo/core/workspace.rs

@@ -3,6 +3,8 @@ use std::collections::BTreeMap;
 use std::path::{Path, PathBuf};
 use std::slice;
 
+use glob::glob;
+
 use core::{Package, VirtualManifest, EitherManifest, SourceId};
 use core::{PackageIdSpec, Dependency, Profile, Profiles};
 use ops;
@@ -316,9 +318,24 @@ impl<'cfg> Workspace<'cfg> {
         };
 
         if let Some(list) = members {
+            let root = root_manifest.parent().unwrap();
+
+            let mut expanded_list = Vec::new();
             for path in list {
-                let root = root_manifest.parent().unwrap();
-                let manifest_path = root.join(path).join("Cargo.toml");
+                let pathbuf = root.join(path);
+                let expanded_paths = expand_member_path(&pathbuf)?;
+
+                // If glob does not find any valid paths, then put the original
+                // path in the expanded list to maintain backwards compatibility.
+                if expanded_paths.is_empty() {
+                    expanded_list.push(pathbuf);
+                } else {
+                    expanded_list.extend(expanded_paths);
+                }
+            }
+
+            for path in expanded_list {
+                let manifest_path = path.join("Cargo.toml");
                 self.find_path_deps(&manifest_path, &root_manifest, false)?;
             }
         }
@@ -527,6 +544,18 @@ impl<'cfg> Workspace<'cfg> {
     }
 }
 
+fn expand_member_path(path: &Path) -> CargoResult<Vec<PathBuf>> {
+    let path = path.to_str().unwrap();
+    let res = glob(path).map_err(|e| {
+        human(format!("could not parse pattern `{}`: {}", &path, e))
+    })?;
+    res.map(|p| {
+        p.or_else(|e| {
+            Err(human(format!("unable to match path to pattern `{}`: {}", &path, e)))
+        })
+    }).collect()
+}
+
 fn is_excluded(members: &Option<Vec<String>>,
                exclude: &[String],
                root_path: &Path,

src/doc/manifest.md

@@ -387,7 +387,7 @@ as:
 [workspace]
 
 # Optional key, inferred if not present
-members = ["path/to/member1", "path/to/member2"]
+members = ["path/to/member1", "path/to/member2", "path/to/member3/*"]
 
 # Optional key, empty if not present
 exclude = ["path1", "path/to/dir2"]
@@ -413,9 +413,12 @@ manifest, is responsible for defining the entire workspace. All `path`
 dependencies residing in the workspace directory become members. You can add
 additional packages to the workspace by listing them in the `members` key. Note
 that members of the workspaces listed explicitly will also have their path
-dependencies included in the workspace. Finally, the `exclude` key can be used
-to blacklist paths from being included in a workspace. This can be useful if
-some path dependencies aren't desired to be in the workspace at all.
+dependencies included in the workspace. Sometimes a project may have a lot of
+workspace members and it can be onerous to keep up to date. The path dependency
+can also use [globs][globs] to match multiple paths. Finally, the `exclude`
+key can be used to blacklist paths from being included in a workspace. This can
+be useful if some path dependencies aren't desired to be in the workspace at
+all.
 
 The `package.workspace` manifest key (described above) is used in member crates
 to point at a workspace's root crate. If this key is omitted then it is inferred

tests/workspaces.rs

@@ -1378,3 +1378,94 @@ fn exclude_but_also_depend() {
                 execs().with_status(0));
     assert_that(&p.root().join("foo/bar/target"), existing_dir());
 }
+
+#[test]
+fn glob_syntax() {
+    let p = project("foo")
+        .file("Cargo.toml", r#"
+            [project]
+            name = "foo"
+            version = "0.1.0"
+            authors = []
+
+            [workspace]
+            members = ["crates/*"]
+            exclude = ["crates/qux"]
+        "#)
+        .file("src/main.rs", "fn main() {}")
+        .file("crates/bar/Cargo.toml", r#"
+            [project]
+            name = "bar"
+            version = "0.1.0"
+            authors = []
+            workspace = "../.."
+        "#)
+        .file("crates/bar/src/main.rs", "fn main() {}")
+        .file("crates/baz/Cargo.toml", r#"
+            [project]
+            name = "baz"
+            version = "0.1.0"
+            authors = []
+            workspace = "../.."
+        "#)
+        .file("crates/baz/src/main.rs", "fn main() {}")
+        .file("crates/qux/Cargo.toml", r#"
+            [project]
+            name = "qux"
+            version = "0.1.0"
+            authors = []
+        "#)
+        .file("crates/qux/src/main.rs", "fn main() {}");
+    p.build();
+
+    assert_that(p.cargo("build"), execs().with_status(0));
+    assert_that(&p.bin("foo"), existing_file());
+    assert_that(&p.bin("bar"), is_not(existing_file()));
+    assert_that(&p.bin("baz"), is_not(existing_file()));
+
+    assert_that(p.cargo("build").cwd(p.root().join("crates/bar")),
+                execs().with_status(0));
+    assert_that(&p.bin("foo"), existing_file());
+    assert_that(&p.bin("bar"), existing_file());
+
+    assert_that(p.cargo("build").cwd(p.root().join("crates/baz")),
+                execs().with_status(0));
+    assert_that(&p.bin("foo"), existing_file());
+    assert_that(&p.bin("baz"), existing_file());
+
+    assert_that(p.cargo("build").cwd(p.root().join("crates/qux")),
+                execs().with_status(0));
+    assert_that(&p.bin("qux"), is_not(existing_file()));
+
+    assert_that(&p.root().join("Cargo.lock"), existing_file());
+    assert_that(&p.root().join("crates/bar/Cargo.lock"), is_not(existing_file()));
+    assert_that(&p.root().join("crates/baz/Cargo.lock"), is_not(existing_file()));
+    assert_that(&p.root().join("crates/qux/Cargo.lock"), existing_file());
+}
+
+#[test]
+fn glob_syntax_invalid_members() {
+    let p = project("foo")
+        .file("Cargo.toml", r#"
+            [project]
+            name = "foo"
+            version = "0.1.0"
+            authors = []
+
+            [workspace]
+            members = ["crates/*"]
+        "#)
+        .file("src/main.rs", "fn main() {}")
+        .file("crates/bar/src/main.rs", "fn main() {}");
+    p.build();
+
+    assert_that(p.cargo("build"),
+                execs().with_status(101)
+                       .with_stderr("\
+error: failed to read `[..]Cargo.toml`
+
+Caused by:
+  [..]
+"));
+}
+