chore: pass --ignore-path .prettierignore when using git ls-files

When prettier receives explicit file paths it skips .prettierignore.
Pass --ignore-path explicitly so exclusions (lib/codecs/tests/data,
config examples with VRL triple-quotes, Hugo build output, etc.) are
still respected.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: pront

Makefile

@@ -512,11 +512,11 @@ fix-markdown: ## Auto-fix markdown style issues
 
 .PHONY: check-prettier
 check-prettier: ## Check that JS/TS/YAML/JSON files are formatted with prettier
-	${MAYBE_ENVIRONMENT_EXEC} prettier --check $(shell git ls-files '*.yml' '*.yaml' '*.js' '*.ts' '*.tsx' '*.json')
+	${MAYBE_ENVIRONMENT_EXEC} prettier --ignore-path .prettierignore --check $(shell git ls-files '*.yml' '*.yaml' '*.js' '*.ts' '*.tsx' '*.json')
 
 .PHONY: fix-prettier
 fix-prettier: ## Auto-fix JS/TS/YAML/JSON formatting with prettier
-	${MAYBE_ENVIRONMENT_EXEC} prettier --write $(shell git ls-files '*.yml' '*.yaml' '*.js' '*.ts' '*.tsx' '*.json')
+	${MAYBE_ENVIRONMENT_EXEC} prettier --ignore-path .prettierignore --write $(shell git ls-files '*.yml' '*.yaml' '*.js' '*.ts' '*.tsx' '*.json')
 
 .PHONY: check-examples
 check-examples: ## Check that the config/examples files are valid

vdev/src/commands/check/fmt.rs

@@ -24,7 +24,8 @@ impl Cli {
             .collect();
         if !files.is_empty() {
             info!("Checking prettier formatting...");
-            let args: Vec<&str> = std::iter::once("--check")
+            let args: Vec<&str> = ["--ignore-path", ".prettierignore", "--check"]
+                .into_iter()
                 .chain(files.iter().map(String::as_str))
                 .collect();
             app::exec("prettier", &args, true)?;

vdev/src/commands/fmt.rs

@@ -24,7 +24,8 @@ impl Cli {
             .collect();
         if !files.is_empty() {
             info!("Formatting with prettier...");
-            let args: Vec<&str> = std::iter::once("--write")
+            let args: Vec<&str> = ["--ignore-path", ".prettierignore", "--write"]
+                .into_iter()
                 .chain(files.iter().map(String::as_str))
                 .collect();
             app::exec("prettier", &args, true)?;