feat(cli): use deno fmt for lock and coverage files (#13018)

2 files changed, 7 insertions, 3 deletions

diff --git a/cli/tools/coverage.rs b/cli/tools/coverage.rs
index 60c87687a..7204c0485 100644
--- a/cli/tools/coverage.rs
+++ b/cli/tools/coverage.rs
@@ -6,6 +6,7 @@ use crate::flags::Flags;
 use crate::fs_util::collect_files;
 use crate::proc_state::ProcState;
 use crate::source_maps::SourceMapGetter;
+use crate::tools::fmt::format_json;
 
 use deno_ast::swc::common::Span;
 use deno_ast::MediaType;
@@ -158,8 +159,11 @@ impl CoverageCollector {
       let filepath = self.dir.join(filename);
 
       let mut out = BufWriter::new(File::create(filepath)?);
-      serde_json::to_writer_pretty(&mut out, &script_coverage)?;
-      out.write_all(b"\n")?;
+      let coverage = serde_json::to_string(&script_coverage)?;
+      let formated_coverage =
+        format_json(&coverage, &Default::default()).unwrap_or(coverage);
+
+      out.write_all(formated_coverage.as_bytes())?;
       out.flush()?;
     }
 
diff --git a/cli/tools/fmt.rs b/cli/tools/fmt.rs
index 9a61851d3..2149552cd 100644
--- a/cli/tools/fmt.rs
+++ b/cli/tools/fmt.rs
@@ -209,7 +209,7 @@ fn format_markdown(
 /// Formats JSON and JSONC using the rules provided by .deno()
 /// of configuration builder of <https://github.com/dprint/dprint-plugin-json>.
 /// See <https://git.io/Jt4ht> for configuration.
-fn format_json(
+pub fn format_json(
   file_text: &str,
   fmt_options: &FmtOptionsConfig,
 ) -> Result<String, String> {