Ignore comma sep for CSV inputs type

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

README.md

@@ -324,11 +324,11 @@ Following inputs can be used as `step.with` keys
 | `platforms`         | List    | List of [target platforms](https://github.com/docker/buildx#---platformvaluevalue) for build |
 | `load`              | Bool    | [Load](https://github.com/docker/buildx#--load) is a shorthand for `--output=type=docker` (default `false`) |
 | `push`              | Bool    | [Push](https://github.com/docker/buildx#--push) is a shorthand for `--output=type=registry` (default `false`) |
-| `outputs`           | List    | List of [output destinations](https://github.com/docker/buildx#-o---outputpath-typetypekeyvalue) (format: `type=local,dest=path`) |
-| `cache-from`        | List    | List of [external cache sources](https://github.com/docker/buildx#--cache-fromnametypetypekeyvalue) (eg. `user/app:cache`, `type=local,src=path/to/dir`) |
-| `cache-to`          | List    | List of [cache export destinations](https://github.com/docker/buildx#--cache-tonametypetypekeyvalue) (eg. `user/app:cache`, `type=local,dest=path/to/dir`) |
+| `outputs`           | CSV     | List of [output destinations](https://github.com/docker/buildx#-o---outputpath-typetypekeyvalue) (format: `type=local,dest=path`) |
+| `cache-from`        | CSV     | List of [external cache sources](https://github.com/docker/buildx#--cache-fromnametypetypekeyvalue) (eg. `user/app:cache`, `type=local,src=path/to/dir`) |
+| `cache-to`          | CSV     | List of [cache export destinations](https://github.com/docker/buildx#--cache-tonametypetypekeyvalue) (eg. `user/app:cache`, `type=local,dest=path/to/dir`) |
 
-> List type can be a comma or newline-delimited string
+> `List` type can be a comma or newline-delimited string
 > ```yaml
 > tags: name/app:latest,name/app:1.0.0
 > ```
@@ -338,6 +338,16 @@ Following inputs can be used as `step.with` keys
 >   name/app:1.0.0
 > ```
 
+> `CSV` type must be a newline-delimited string
+> ```yaml
+> cache-from: user/app:cache
+> ```
+> ```yaml
+> cache-from: |
+>   user/app:cache
+>   type=local,src=path/to/dir
+> ```
+
 ### outputs
 
 Following outputs are available

__tests__/context.test.ts

@@ -35,6 +35,20 @@ describe('getInputList', () => {
     console.log(res);
     expect(res).toEqual(['bar', 'baz', 'bat']);
   });
+
+  it('handles multiple lines and ignoring comma correctly', async () => {
+    setInput('cache-from', 'user/app:cache\ntype=local,src=path/to/dir');
+    const res = await context.getInputList('cache-from', true);
+    console.log(res);
+    expect(res).toEqual(['user/app:cache', 'type=local,src=path/to/dir']);
+  });
+
+  it('handles different new lines and ignoring comma correctly', async () => {
+    setInput('cache-from', 'user/app:cache\r\ntype=local,src=path/to/dir');
+    const res = await context.getInputList('cache-from', true);
+    console.log(res);
+    expect(res).toEqual(['user/app:cache', 'type=local,src=path/to/dir']);
+  });
 });
 
 describe('asyncForEach', () => {

src/context.ts

@@ -41,9 +41,9 @@ export async function getInputs(): Promise<Inputs> {
     platforms: await getInputList('platforms'),
     load: /true/i.test(core.getInput('load')),
     push: /true/i.test(core.getInput('push')),
-    outputs: await getInputList('outputs'),
-    cacheFrom: await getInputList('cache-from'),
-    cacheTo: await getInputList('cache-to')
+    outputs: await getInputList('outputs', true),
+    cacheFrom: await getInputList('cache-from', true),
+    cacheTo: await getInputList('cache-to', true)
   };
 }
 
@@ -110,12 +110,14 @@ async function getCommonArgs(inputs: Inputs): Promise<Array<string>> {
   return args;
 }
 
-export async function getInputList(name: string): Promise<string[]> {
+export async function getInputList(name: string, ignoreComma?: boolean): Promise<string[]> {
   const items = core.getInput(name);
   if (items == '') {
     return [];
   }
-  return items.split(/\r?\n/).reduce<string[]>((acc, line) => acc.concat(line.split(',')).map(pat => pat.trim()), []);
+  return items
+    .split(/\r?\n/)
+    .reduce<string[]>((acc, line) => acc.concat(!ignoreComma ? line.split(',') : line).map(pat => pat.trim()), []);
 }
 
 export const asyncForEach = async (array, callback) => {