Add the OCaml problem matcher

Signed-off-by: Sora Morimoto <sora@morimoto.io>

Author: smorimoto

.github/ocaml.json

@@ -0,0 +1,21 @@
+{
+  "problemMatcher": [
+    {
+      "owner": "ocaml",
+      "pattern": [
+        {
+          "regexp": "^File\\s\"(.+)\",\\sline\\s(\\d+),\\scharacters\\s(\\d+)-(\\d+):\\n((.|\\n)+?)(Error|Warning)\\s*(.*):\\s((.|\\n)+)$",
+          "kind": "location",
+          "file": 1,
+          "line": 2,
+          "column": 3,
+          "endLine": 2,
+          "endColumn": 4,
+          "severity": 7,
+          "code": 5,
+          "message": 10
+        }
+      ]
+    }
+  ]
+}

CHANGELOG.md

@@ -8,6 +8,10 @@ and this project adheres to
 
 ## [unreleased]
 
+### Added
+
+- Add the OCaml problem matcher.
+
 ## [2.0.20]
 
 ### Changed

dist/index.js

@@ -3,6 +3,7 @@ import * as path from "node:path";
 import * as process from "node:process";
 
 import * as core from "@actions/core";
+import { issueCommand } from "@actions/core/lib/command";
 import { exec } from "@actions/exec";
 
 import {
@@ -112,6 +113,17 @@ export async function installer() {
       }
     }
   }
+  core.startGroup("Add the OCaml problem matcher");
+  const ocamlMatcherPath = path.join(
+    // eslint-disable-next-line unicorn/prefer-module
+    __dirname,
+    "..",
+    "..",
+    ".github",
+    "ocaml.json",
+  );
+  issueCommand("add-matcher", {}, ocamlMatcherPath);
+  core.endGroup();
   await exec("opam", ["--version"]);
   if (OPAM_DEPEXT) {
     await exec("opam", ["depext", "--version"]);