Convert cargo tree warning

Author: jneem

src/bin/cargo/commands/tree.rs

@@ -1,5 +1,6 @@
 use crate::cli;
 use crate::command_prelude::*;
+use annotate_snippets::Level;
 use anyhow::{bail, format_err};
 use cargo::core::dependency::DepKind;
 use cargo::ops::Packages;
@@ -141,10 +142,16 @@ pub fn exec(gctx: &mut GlobalContext, args: &ArgMatches) -> CliResult {
 
     let no_dedupe = args.flag("no-dedupe") || args.flag("all");
     if args.flag("all") {
-        gctx.shell().warn(
-            "The `cargo tree` --all flag has been changed to --no-dedupe, \
-             and may be removed in a future version.\n\
-             If you are looking to display all workspace members, use the --workspace flag.",
+        gctx.shell().print_report(
+            &[Level::WARNING
+                .secondary_title(
+                    "the `cargo tree` --all flag has been changed to --no-dedupe, \
+                    and may be removed in a future version)",
+                )
+                .element(Level::HELP.message(
+                    "if you are looking to display all workspace members, use the --workspace flag",
+                ))],
+            false,
         )?;
     }
 

tests/testsuite/cargo_tree/dupe/mod.rs

@@ -60,8 +60,9 @@ fn all_flag() {
         .build();
 
     p.cargo("tree --all").with_stderr_data(str![[r#"
-[WARNING] The `cargo tree` --all flag has been changed to --no-dedupe, and may be removed in a future version.
-If you are looking to display all workspace members, use the --workspace flag.
+[WARNING] the `cargo tree` --all flag has been changed to --no-dedupe, and may be removed in a future version)
+  |
+  = [HELP] if you are looking to display all workspace members, use the --workspace flag
 ...
 "#]]).run();
 }