feat(cli): expose formatWithErrors via --format-with-errors flag

.changeset/icy-views-lick.md

@@ -0,0 +1,14 @@
+---
+"@biomejs/biome": minor
+---
+
+The `formatWithErrors` option can now be set via CLI using the `--format-with-errors` flag.
+
+This flag was previously only available in the configuration file. It allows formatting to proceed on files with syntax errors, which is useful during development when you want to auto-format code while fixing syntax issues.
+
+#### Example
+
+```shell
+biome format --format-with-errors=true --write file.js
+```
+

crates/biome_cli/tests/commands/check.rs

@@ -3251,3 +3251,38 @@ fn check_does_not_enable_assist() {
         result,
     ));
 }
+
+#[test]
+fn check_format_with_syntax_errors_when_flag_enabled() {
+    let fs = MemoryFileSystem::default();
+    let mut console = BufferConsole::default();
+
+    let invalid = Utf8Path::new("invalid.js");
+    fs.insert(invalid.into(), "while ) {}".as_bytes());
+
+    let (fs, result) = run_cli(
+        fs,
+        &mut console,
+        Args::from(
+            [
+                "check",
+                "--format-with-errors=true",
+                "--write",
+                invalid.as_str(),
+            ]
+            .as_slice(),
+        ),
+    );
+
+    assert!(result.is_err(), "run_cli returned {result:?}");
+
+    assert_file_contents(&fs, invalid, "while ) {}\n");
+
+    assert_cli_snapshot(SnapshotPayload::new(
+        module_path!(),
+        "check_format_with_syntax_errors_when_flag_enabled",
+        fs,
+        console,
+        result,
+    ));
+}

crates/biome_cli/tests/commands/format.rs

@@ -3549,3 +3549,38 @@ fn should_not_format_file_with_syntax_errors() {
         result,
     ));
 }
+
+#[test]
+fn should_format_file_with_syntax_errors_when_flag_enabled() {
+    let fs = MemoryFileSystem::default();
+    let mut console = BufferConsole::default();
+
+    let invalid = Utf8Path::new("invalid.js");
+    fs.insert(invalid.into(), "while ) {}".as_bytes());
+
+    let (fs, result) = run_cli(
+        fs,
+        &mut console,
+        Args::from(
+            [
+                "format",
+                "--format-with-errors=true",
+                "--write",
+                invalid.as_str(),
+            ]
+            .as_slice(),
+        ),
+    );
+
+    assert!(result.is_err(), "run_cli returned {result:?}");
+
+    assert_file_contents(&fs, invalid, "while ) {}\n");
+
+    assert_cli_snapshot(SnapshotPayload::new(
+        module_path!(),
+        "should_format_file_with_syntax_errors_when_flag_enabled",
+        fs,
+        console,
+        result,
+    ));
+}

crates/biome_cli/tests/snapshots/main_commands_check/check_format_with_syntax_errors_when_flag_enabled.snap

@@ -0,0 +1,54 @@
+---
+source: crates/biome_cli/tests/snap_test.rs
+expression: redactor(content)
+---
+## `invalid.js`
+
+```js
+while ) {}
+
+```
+
+# Termination Message
+
+```block
+check ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+  × Some errors were emitted while applying fixes.
+
+
+
+```
+
+# Emitted Messages
+
+```block
+invalid.js:1:7 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+  × expected `(` but instead found `)`
+
+  > 1 │ while ) {}
+      │       ^
+
+  i Remove )
+
+
+```
+
+```block
+invalid.js:1:7 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+  × expected `(` but instead found `)`
+
+  > 1 │ while ) {}
+      │       ^
+
+  i Remove )
+
+
+```
+
+```block
+Checked 1 file in <TIME>. Fixed 1 file.
+Found 2 errors.
+```

crates/biome_cli/tests/snapshots/main_commands_check/check_help.snap

@@ -27,6 +27,8 @@ The configuration that is contained inside the file `biome.json`
                               1 MiB
         --files-ignore-unknown=<true|false>  Tells Biome to not emit diagnostics when handling files
                               that doesn't know
+        --format-with-errors=<true|false>  Stores whether formatting should be allowed to proceed if
+                              a given file has syntax errors
         --indent-style=<tab|space>  The indent style.
         --indent-width=NUMBER  The size of the indentation, 2 by default
         --line-ending=<lf|crlf|cr|auto>  The type of line ending.

crates/biome_cli/tests/snapshots/main_commands_ci/ci_help.snap

@@ -28,6 +28,8 @@ The configuration that is contained inside the file `biome.json`
                               1 MiB
         --files-ignore-unknown=<true|false>  Tells Biome to not emit diagnostics when handling files
                               that doesn't know
+        --format-with-errors=<true|false>  Stores whether formatting should be allowed to proceed if
+                              a given file has syntax errors
         --indent-style=<tab|space>  The indent style.
         --indent-width=NUMBER  The size of the indentation, 2 by default
         --line-ending=<lf|crlf|cr|auto>  The type of line ending.

crates/biome_cli/tests/snapshots/main_commands_format/format_help.snap

@@ -10,6 +10,8 @@ Run the formatter on a set of files.
 Usage: format [--write] [--staged] [--changed] [--since=REF] [PATH]...
 
 Generic options applied to all files
+        --format-with-errors=<true|false>  Stores whether formatting should be allowed to proceed if
+                              a given file has syntax errors
         --indent-style=<tab|space>  The indent style.
         --indent-width=NUMBER  The size of the indentation, 2 by default
         --line-ending=<lf|crlf|cr|auto>  The type of line ending.

crates/biome_cli/tests/snapshots/main_commands_format/should_format_file_with_syntax_errors_when_flag_enabled.snap

@@ -0,0 +1,41 @@
+---
+source: crates/biome_cli/tests/snap_test.rs
+expression: redactor(content)
+---
+## `invalid.js`
+
+```js
+while ) {}
+
+```
+
+# Termination Message
+
+```block
+format ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+  × Some errors were emitted while running checks.
+
+
+
+```
+
+# Emitted Messages
+
+```block
+invalid.js:1:7 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+  × expected `(` but instead found `)`
+
+  > 1 │ while ) {}
+      │       ^
+
+  i Remove )
+
+
+```
+
+```block
+Formatted 1 file in <TIME>. Fixed 1 file.
+Found 1 error.
+```

crates/biome_configuration/src/formatter.rs

@@ -25,7 +25,7 @@ pub struct FormatterConfiguration {
 
     /// Stores whether formatting should be allowed to proceed if a given file
     /// has syntax errors
-    #[bpaf(hide)]
+    #[bpaf(long("format-with-errors"), argument("true|false"))]
     #[serde(skip_serializing_if = "Option::is_none")]
     pub format_with_errors: Option<FormatWithErrorsEnabled>,