feat(fix): Migrate underscore toml fields

src/cargo/ops/fix.rs

@@ -254,10 +254,53 @@ fn migrate_manifests(ws: &Workspace<'_>, pkgs: &[&Package]) -> CargoResult<()> {
             let mut fixes = 0;
 
             let root = document.as_table_mut();
+
+            if let Some(workspace) = root
+                .get_mut("workspace")
+                .and_then(|t| t.as_table_like_mut())
+            {
+                // strictly speaking, the edition doesn't apply to this table but it should be safe
+                // enough
+                fixes += rename_dep_fields_2024(workspace, "dependencies");
+            }
+
             fixes += add_feature_for_unused_deps(pkg, root);
             if rename_table(root, "project", "package") {
                 fixes += 1;
             }
+            if let Some(target) = root.get_mut("lib").and_then(|t| t.as_table_like_mut()) {
+                fixes += rename_target_fields_2024(target);
+            }
+            fixes += rename_array_of_target_fields_2024(root, "bin");
+            fixes += rename_array_of_target_fields_2024(root, "example");
+            fixes += rename_array_of_target_fields_2024(root, "test");
+            fixes += rename_array_of_target_fields_2024(root, "bench");
+            fixes += rename_dep_fields_2024(root, "dependencies");
+            if rename_table(root, "dev_dependencies", "dev-dependencies") {
+                fixes += 1;
+            }
+            fixes += rename_dep_fields_2024(root, "dev-dependencies");
+            if rename_table(root, "build_dependencies", "build-dependencies") {
+                fixes += 1;
+            }
+            fixes += rename_dep_fields_2024(root, "build-dependencies");
+            for target in root
+                .get_mut("target")
+                .and_then(|t| t.as_table_like_mut())
+                .iter_mut()
+                .flat_map(|t| t.iter_mut())
+                .filter_map(|(_k, t)| t.as_table_like_mut())
+            {
+                fixes += rename_dep_fields_2024(target, "dependencies");
+                if rename_table(target, "dev_dependencies", "dev-dependencies") {
+                    fixes += 1;
+                }
+                fixes += rename_dep_fields_2024(target, "dev-dependencies");
+                if rename_table(target, "build_dependencies", "build-dependencies") {
+                    fixes += 1;
+                }
+                fixes += rename_dep_fields_2024(target, "build-dependencies");
+            }
 
             if 0 < fixes {
                 let verb = if fixes == 1 { "fix" } else { "fixes" };
@@ -274,6 +317,46 @@ fn migrate_manifests(ws: &Workspace<'_>, pkgs: &[&Package]) -> CargoResult<()> {
     Ok(())
 }
 
+fn rename_dep_fields_2024(parent: &mut dyn toml_edit::TableLike, dep_kind: &str) -> usize {
+    let mut fixes = 0;
+    for target in parent
+        .get_mut(dep_kind)
+        .and_then(|t| t.as_table_like_mut())
+        .iter_mut()
+        .flat_map(|t| t.iter_mut())
+        .filter_map(|(_k, t)| t.as_table_like_mut())
+    {
+        if rename_table(target, "default_features", "default-features") {
+            fixes += 1;
+        }
+    }
+    fixes
+}
+
+fn rename_array_of_target_fields_2024(root: &mut dyn toml_edit::TableLike, kind: &str) -> usize {
+    let mut fixes = 0;
+    for target in root
+        .get_mut(kind)
+        .and_then(|t| t.as_array_of_tables_mut())
+        .iter_mut()
+        .flat_map(|t| t.iter_mut())
+    {
+        fixes += rename_target_fields_2024(target);
+    }
+    fixes
+}
+
+fn rename_target_fields_2024(target: &mut dyn toml_edit::TableLike) -> usize {
+    let mut fixes = 0;
+    if rename_table(target, "crate_type", "crate-type") {
+        fixes += 1;
+    }
+    if rename_table(target, "proc_macro", "proc-macro") {
+        fixes += 1;
+    }
+    fixes
+}
+
 fn rename_table(parent: &mut dyn toml_edit::TableLike, old: &str, new: &str) -> bool {
     let Some(old_key) = parent.key(old).cloned() else {
         return false;

tests/testsuite/fix.rs

@@ -2129,26 +2129,7 @@ a = {path = "a", default_features = false}
         .with_stderr(
             "\
 [MIGRATING] Cargo.toml from 2021 edition to 2024
-[WARNING] [CWD]/Cargo.toml: `dev_dependencies` is deprecated in favor of `dev-dependencies` and will not work in the 2024 edition
-(in the `foo` package)
-[WARNING] [CWD]/Cargo.toml: `default_features` is deprecated in favor of `default-features` and will not work in the 2024 edition
-(in the `a` dependency)
-[WARNING] [CWD]/Cargo.toml: `build_dependencies` is deprecated in favor of `build-dependencies` and will not work in the 2024 edition
-(in the `foo` package)
-[WARNING] [CWD]/Cargo.toml: `default_features` is deprecated in favor of `default-features` and will not work in the 2024 edition
-(in the `a` dependency)
-[WARNING] [CWD]/Cargo.toml: `dev_dependencies` is deprecated in favor of `dev-dependencies` and will not work in the 2024 edition
-(in the `cfg(any())` platform target)
-[WARNING] [CWD]/Cargo.toml: `default_features` is deprecated in favor of `default-features` and will not work in the 2024 edition
-(in the `a` dependency)
-[WARNING] [CWD]/Cargo.toml: `build_dependencies` is deprecated in favor of `build-dependencies` and will not work in the 2024 edition
-(in the `cfg(any())` platform target)
-[WARNING] [CWD]/Cargo.toml: `default_features` is deprecated in favor of `default-features` and will not work in the 2024 edition
-(in the `a` dependency)
-[WARNING] [CWD]/Cargo.toml: `crate_type` is deprecated in favor of `crate-type` and will not work in the 2024 edition
-(in the `foo` library target)
-[WARNING] [CWD]/Cargo.toml: `crate_type` is deprecated in favor of `crate-type` and will not work in the 2024 edition
-(in the `ex` example target)
+[FIXED] Cargo.toml (11 fixes)
      Locking 2 packages to latest compatible versions
     Checking a v0.0.1 ([CWD]/a)
 [CHECKING] foo v0.0.0 ([CWD])
@@ -2165,7 +2146,7 @@ cargo-features = ["edition2024"]
 
 [workspace.dependencies]
 # Before default_features
-a = {path = "a", default_features = false}  # After default_features value
+a = {path = "a", default-features = false}  # After default_features value
 # After default_features line
 
 [package]
@@ -2175,40 +2156,40 @@ edition = "2021"
 [lib]
 name = "foo"
 # Before crate_type
-crate_type = ["staticlib", "dylib"]  # After crate_type value
+crate-type = ["staticlib", "dylib"]  # After crate_type value
 # After crate_type line
 
 [[example]]
 name = "ex"
 path = "examples/ex.rs"
 # Before crate_type
-crate_type = ["proc-macro"]  # After crate_type value
+crate-type = ["proc-macro"]  # After crate_type value
 # After crate_type line
 
 # Before dev_dependencies
-[ dev_dependencies ] # After dev_dependencies header
+[ dev-dependencies ] # After dev_dependencies header
 # After dev_dependencies line
-a = {path = "a", default_features = false}
+a = {path = "a", default-features = false}
 # After dev_dependencies table
 
 # Before build_dependencies
-[ build_dependencies ] # After build_dependencies header
+[ build-dependencies ] # After build_dependencies header
 # After build_dependencies line
-a = {path = "a", default_features = false}
+a = {path = "a", default-features = false}
 # After build_dependencies table
 
 # Before dev_dependencies
-[ target.'cfg(any())'.dev_dependencies ] # After dev_dependencies header
+[ target.'cfg(any())'.dev-dependencies ] # After dev_dependencies header
 # After dev_dependencies line
-a = {path = "a", default_features = false}
+a = {path = "a", default-features = false}
 # After dev_dependencies table
 
 # Before build_dependencies
-[ target.'cfg(any())'.build_dependencies ] # After build_dependencies header
+[ target.'cfg(any())'.build-dependencies ] # After build_dependencies header
 # After build_dependencies line
-a = {path = "a", default_features = false}
+a = {path = "a", default-features = false}
 # After build_dependencies table
-"#
+"#,
     );
 }