From 076a443dfe86c0b9f1f573ed15bd44a643e0c812 Mon Sep 17 00:00:00 2001
From: mmkal <misha.kaletsky@gmail.com>
Date: Wed, 7 Oct 2020 17:38:30 -0400
Subject: [PATCH 1/2] fix: trim empty lines

this prevents an interaction with other lint rules which expect newlines at the end of the file
---
 packages/eslint-plugin-codegen/src/__tests__/plugin.test.ts | 6 +++---
 packages/eslint-plugin-codegen/src/index.ts                 | 4 ++--
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/packages/eslint-plugin-codegen/src/__tests__/plugin.test.ts b/packages/eslint-plugin-codegen/src/__tests__/plugin.test.ts
index 9c1d51de..fa85ab7e 100644
--- a/packages/eslint-plugin-codegen/src/__tests__/plugin.test.ts
+++ b/packages/eslint-plugin-codegen/src/__tests__/plugin.test.ts
@@ -24,11 +24,11 @@ describe('markdown processor', () => {
       Array [
         "/* eslint-disable prettier/prettier */ // eslint-plugin-codegen:remove
       // eslint-plugin-codegen:trim# Title
-      // eslint-plugin-codegen:trim
+
       // eslint-plugin-codegen:trim<!-- comment -->
-      // eslint-plugin-codegen:trim
+
       // eslint-plugin-codegen:trim<div>html</div>
-      // eslint-plugin-codegen:trim
+
       // eslint-plugin-codegen:trim\`\`\`js
       // eslint-plugin-codegen:trim// some javascript
       // eslint-plugin-codegen:trimconst x = 1
diff --git a/packages/eslint-plugin-codegen/src/index.ts b/packages/eslint-plugin-codegen/src/index.ts
index 11d436a2..83dd853c 100644
--- a/packages/eslint-plugin-codegen/src/index.ts
+++ b/packages/eslint-plugin-codegen/src/index.ts
@@ -21,7 +21,7 @@ const getPreprocessor = (): eslint.Linter.LintOptions => {
         os.EOL +
         text
           .split(/\r?\n/)
-          .map(line => `// eslint-plugin-codegen:trim${line}`)
+          .map(line => line && `// eslint-plugin-codegen:trim${line}`)
           .join(os.EOL),
     ],
     postprocess: messageLists => ([] as eslint.Linter.LintMessage[]).concat(...messageLists),
@@ -109,7 +109,7 @@ const codegen: eslint.Rule.RuleModule = {
         const opts = maybeOptions.right || {}
         const presets: Record<string, presetsModule.Preset<unknown> | undefined> = {
           ...presetsModule,
-          ...context.options?.[0]?.presets,
+          ...context.options[0]?.presets,
         }
         const preset = typeof opts?.preset === 'string' && presets[opts.preset]
         if (typeof preset !== 'function') {

From 7a9d9e8892c2cba96e83693e2909d48b8110f9bc Mon Sep 17 00:00:00 2001
From: mmkal <mmkal@users.noreply.github.com>
Date: Mon, 12 Oct 2020 12:07:54 +0000
Subject: [PATCH 2/2] chore: change files

---
 .../codegen-trim-empty-lines_pr-201.json              | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 common/changes/eslint-plugin-codegen/codegen-trim-empty-lines_pr-201.json

diff --git a/common/changes/eslint-plugin-codegen/codegen-trim-empty-lines_pr-201.json b/common/changes/eslint-plugin-codegen/codegen-trim-empty-lines_pr-201.json
new file mode 100644
index 00000000..3c4f390c
--- /dev/null
+++ b/common/changes/eslint-plugin-codegen/codegen-trim-empty-lines_pr-201.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "fix: trim empty lines (#201)",
+      "type": "patch",
+      "packageName": "eslint-plugin-codegen"
+    }
+  ],
+  "packageName": "eslint-plugin-codegen",
+  "email": "mmkal@users.noreply.github.com"
+}
\ No newline at end of file