feat: use default value for term.progress

Author: Gordon01

src/cargo/util/context/mod.rs

@@ -2830,6 +2830,7 @@ pub struct TermConfig {
 #[derive(Debug, Default, Deserialize)]
 #[serde(rename_all = "kebab-case")]
 pub struct ProgressConfig {
+    #[serde(default)]
     pub when: ProgressWhen,
     pub width: Option<usize>,
 }

tests/testsuite/progress.rs

@@ -53,7 +53,7 @@ fn bad_progress_config_missing_width() {
 }
 
 #[cargo_test]
-fn bad_progress_config_missing_when() {
+fn default_progress_is_auto() {
     let p = project()
         .file(
             ".cargo/config.toml",
@@ -65,16 +65,7 @@ fn bad_progress_config_missing_when() {
         .file("src/lib.rs", "")
         .build();
 
-    p.cargo("check")
-        .with_status(101)
-        .with_stderr_data(str![[r#"
-[ERROR] error in [ROOT]/foo/.cargo/config.toml: could not load config key `term.progress`
-
-Caused by:
-  missing field `when`
-
-"#]])
-        .run();
+    p.cargo("check").run();
 }
 
 #[cargo_test]