feat(tree): implement filtering logic for --depth workspace flag

src/cargo/ops/tree/mod.rs

@@ -45,6 +45,7 @@ pub struct TreeOptions {
     pub graph_features: bool,
     /// Display depth of the dependency tree.
     /// If non-negative integer, display dependencies with that amount of max depth.
+    /// If `workspace`, display dependencies from current workspace only.
     pub display_depth: DisplayDepth,
     /// Excludes proc-macro dependencies.
     pub no_proc_macro: bool,
@@ -90,18 +91,20 @@ impl FromStr for Prefix {
 #[derive(Clone, Copy)]
 pub enum DisplayDepth {
     MaxDisplayDepth(u32),
+    Workspace,
 }
 
 impl FromStr for DisplayDepth {
     type Err = clap::Error;
 
     fn from_str(s: &str) -> Result<Self, Self::Err> {
         match s {
+            "workspace" => Ok(Self::Workspace),
             s => s.parse().map(Self::MaxDisplayDepth).map_err(|_| {
                 clap::Error::raw(
                     clap::error::ErrorKind::ValueValidation,
                     format!(
-                        "supported values for --depth are non-negative integers, \
+                        "supported values for --depth are non-negative integers and `workspace`, \
                                 but `{}` is unknown",
                         s
                     ),
@@ -403,8 +406,9 @@ fn print_dependencies<'a>(
         }
     }
 
-    let max_display_depth = match display_depth {
-        DisplayDepth::MaxDisplayDepth(max) => max,
+    let (max_display_depth, filter_non_workspace_member) = match display_depth {
+        DisplayDepth::MaxDisplayDepth(max) => (max, false),
+        DisplayDepth::Workspace => (u32::MAX, true),
     };
 
     // Current level exceeds maximum display depth. Skip.
@@ -418,6 +422,9 @@ fn print_dependencies<'a>(
             // Filter out packages to prune.
             match graph.node(**dep) {
                 Node::Package { package_id, .. } => {
+                    if filter_non_workspace_member && !ws.is_member_id(*package_id) {
+                        return false;
+                    }
                     !pkgs_to_prune.iter().any(|spec| spec.matches(*package_id))
                 }
                 _ => true,

src/doc/man/cargo-tree.md

@@ -96,6 +96,9 @@ Prune the given package from the display of the dependency tree.
 {{#option "`--depth` _depth_" }}
 Maximum display depth of the dependency tree. A depth of 1 displays the direct
 dependencies, for example.
+
+If the given value is `workspace`, only shows the dependencies that are member
+of the current workspace, instead.
 {{/option}}
 
 {{#option "`--no-dedupe`" }}

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

@@ -85,6 +85,9 @@ OPTIONS
            Maximum display depth of the dependency tree. A depth of 1 displays
            the direct dependencies, for example.
 
+           If the given value is workspace, only shows the dependencies that
+           are member of the current workspace, instead.
+
        --no-dedupe
            Do not de-duplicate repeated dependencies. Usually, when a package
            has already displayed its dependencies, further occurrences will not

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

@@ -91,7 +91,9 @@ subtree of the package given to <code>-p</code>.</dd>
 
 <dt class="option-term" id="option-cargo-tree---depth"><a class="option-anchor" href="#option-cargo-tree---depth"></a><code>--depth</code> <em>depth</em></dt>
 <dd class="option-desc">Maximum display depth of the dependency tree. A depth of 1 displays the direct
-dependencies, for example.</dd>
+dependencies, for example.</p>
+<p>If the given value is <code>workspace</code>, only shows the dependencies that are member
+of the current workspace, instead.</dd>
 
 
 <dt class="option-term" id="option-cargo-tree---no-dedupe"><a class="option-anchor" href="#option-cargo-tree---no-dedupe"></a><code>--no-dedupe</code></dt>

src/etc/man/cargo-tree.1

@@ -93,6 +93,9 @@ Prune the given package from the display of the dependency tree.
 .RS 4
 Maximum display depth of the dependency tree. A depth of 1 displays the direct
 dependencies, for example.
+.sp
+If the given value is \fBworkspace\fR, only shows the dependencies that are member
+of the current workspace, instead.
 .RE
 .sp
 \fB\-\-no\-dedupe\fR

tests/testsuite/tree.rs

@@ -1888,15 +1888,12 @@ fn depth_workspace() {
         .file("c/src/lib.rs", "")
         .build();
 
-    p.cargo("tree")
+    p.cargo("tree --depth workspace")
         .with_stdout_data(str![[r#"
 a v1.0.0 ([ROOT]/foo/a)
 
 b v0.1.0 ([ROOT]/foo/b)
-├── c v0.1.0 ([ROOT]/foo/c)
-│   ├── otherdep v1.0.0
-│   └── somedep v1.0.0
-└── somedep v1.0.0
+└── c v0.1.0 ([ROOT]/foo/c)
 
 c v0.1.0 ([ROOT]/foo/c) (*)