Replace linting setup with flint

Adopt grafana/flint v0.2.0 to consolidate lint tasks previously sourced
from grafana/docker-otel-lgtm and opentelemetry-java-contrib into a
single set of reusable tasks.

- Replace 9 lint tasks in mise.toml with 4 flint-based tasks
- Merge super-linter.yml and lint-rest.yml into unified lint.yml workflow
- Add Renovate custom manager for flint SHA-pinned URL tracking
- Update CONTRIBUTING.md and CLAUDE.md lint command references
- Clean up .editorconfig stale path references
Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

Author: zeitlinger

.editorconfig

@@ -18,5 +18,5 @@ max_line_length = 120
 indent_size = 4
 max_line_length = 120
 
-[{.mise/tasks/build-release.sh,.mise/tasks/lint/super-linter.sh,.mise/tasks/lint/links-in-modified-files.sh,.github/workflows/multi-version-test.yml,.github/workflows/lint-rest.yml}]
+[{.mise/tasks/build-release.sh,.github/workflows/multi-version-test.yml}]
 max_line_length = 200

.github/renovate.json5

@@ -40,5 +40,12 @@
       managerFilePatterns: ["/^mise\\.toml$/"],
       matchStrings: ['# renovate: datasource=(?<datasource>[a-z-]+?)(?: depName=(?<depName>.+?))?(?: packageName=(?<packageName>.+?))?(?: versioning=(?<versioning>[a-z-]+?))?\\s.+?_VERSION="?(?<currentValue>[^@"]+?)(?:@(?<currentDigest>sha256:[a-f0-9]+))?"?\\s'],
     },
+    {
+      customType: "regex",
+      description: "Update flint version in raw.githubusercontent.com URLs (pinned to SHA)",
+      managerFilePatterns: ["/^mise\\.toml$/"],
+      matchStrings: ["https://raw\\.githubusercontent\\.com/(?<depName>[^/]+/[^/]+)/(?<currentDigest>[a-f0-9]{40})/.*#\\s*(?<currentValue>v\\S+)"],
+      datasourceTemplate: "github-tags",
+    },
   ],
 }

.github/workflows/lint-rest.yml .github/workflows/lint.yml.github/workflows/lint-rest.yml renamed to .github/workflows/lint.yml

@@ -1,5 +1,5 @@
 ---
-name: Lint What Super Linter Can't
+name: Lint
 
 on:
   pull_request:
@@ -8,16 +8,20 @@ permissions: {}
 
 jobs:
   lint:
+    runs-on: ubuntu-24.04
+
     permissions:
       contents: read
-    runs-on: ubuntu-24.04
+
     steps:
-      - name: Check out
+      - name: Checkout code
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
-          fetch-depth: 0 # needed for merge-base used in lint:links-in-modified-files
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: jdx/mise-action@6d1e696aa24c1aa1bcc1adea0212707c71ab78a8 # v3.6.1
+          fetch-depth: 0
+
+      - name: Setup mise
+        uses: jdx/mise-action@6d1e696aa24c1aa1bcc1adea0212707c71ab78a8 # v3.6.1
 
       - name: Remap main branch URLs to PR branch for link checking
         env:
@@ -27,8 +31,8 @@ jobs:
           sed -i "/^remap = \[$/a\  \"https://github.com/prometheus/client_java/blob/main/(.*) https://github.com/${PR_HEAD_REPO}/blob/${GITHUB_HEAD_REF}/\$1\"," .github/config/lychee.toml
           sed -i "/^remap = \[$/a\  \"https://github.com/prometheus/client_java/tree/main/(.*) https://github.com/${PR_HEAD_REPO}/tree/${GITHUB_HEAD_REF}/\$1\"," .github/config/lychee.toml
 
-      - name: Lint for pull requests
+      - name: Lint
         env:
           GITHUB_TOKEN: ${{ github.token }}
           GITHUB_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
-        run: mise run lint:rest-ci
+        run: mise run lint

.github/workflows/super-linter.yml

@@ -91,7 +91,9 @@ Pre-built instrumentations: `prometheus-metrics-instrumentation-jvm`, `-caffeine
 
 ### Non-Java Files (Markdown, YAML, JSON, shell scripts, etc.)
 
-- **ALWAYS** run `mise run lint:super-linter` after modifying non-Java files
+- **ALWAYS** run `mise run lint` after modifying non-Java files
+  (runs super-linter + link checking + BOM check)
+- `mise run fix` auto-fixes lint issues
 - Super-linter will **auto-fix** many issues (formatting, trailing whitespace, etc.)
 - It only reports ERROR-level issues (configured via `LOG_LEVEL=ERROR` in `.github/super-linter.env`)
 - Common issues caught:
@@ -107,7 +109,8 @@ Pre-built instrumentations: `prometheus-metrics-instrumentation-jvm`, `-caffeine
 mise run build
 
 # After modifying non-Java files (run BEFORE committing)
-mise run lint:super-linter
+mise run lint
+# or to auto-fix: mise run fix
 ```
 
 ## Testing

CLAUDE.md

@@ -21,7 +21,11 @@ Run `./mvnw spotless:apply` to format the code (only changed files) before commi
 
 Or run all the linters:
 
-`mise run lint:super-linter`
+`mise run lint`
+
+To autofix linting issues:
+
+`mise run fix`
 
 ## Running Tests
 

CONTRIBUTING.md

@@ -47,38 +47,22 @@ run = "./mvnw verify"
 description = "build all modules without tests"
 run = "./mvnw install -DskipTests -Dcoverage.skip=true"
 
+# Shared lint tasks from flint (https://github.com/grafana/flint)
 [tasks."lint:super-linter"]
-description = "Run Super-Linter with auto-fix on the repository"
-file = "https://raw.githubusercontent.com/grafana/docker-otel-lgtm/f5d39ffaf01b5bbe815b3821e4e3257db32f49e7/.mise/tasks/lint/super-linter.sh"
+description = "Run Super-Linter on the repository"
+file = "https://raw.githubusercontent.com/grafana/flint/d51085d44d29d60914eaf1d353a45a68bfccf352/tasks/lint/super-linter.sh" # v0.2.0
 
 [tasks."lint:links"]
-file = "https://raw.githubusercontent.com/open-telemetry/opentelemetry-java-contrib/refs/heads/main/.mise/tasks/lint/links.sh"
+description = "Lint links"
+file = "https://raw.githubusercontent.com/grafana/flint/d51085d44d29d60914eaf1d353a45a68bfccf352/tasks/lint/links.sh" # v0.2.0
 
-[tasks."lint:local-links"]
-file = "https://raw.githubusercontent.com/open-telemetry/opentelemetry-java-contrib/refs/heads/main/.mise/tasks/lint/local-links.sh"
+[tasks."lint"]
+description = "Run all lints"
+depends = ["lint:super-linter", "lint:links", "lint:bom"]
 
-[tasks."lint:links-in-modified-files"]
-file = "https://raw.githubusercontent.com/open-telemetry/opentelemetry-java-contrib/refs/heads/main/.mise/tasks/lint/links-in-modified-files.sh"
-
-[tasks."lint:links-in-modified-files-ci"]
-description = "Lint links in modified files (CI configuration)"
-run = "mise run lint:links-in-modified-files --base origin/$GITHUB_BASE_REF --head $GITHUB_HEAD_SHA"
-
-[tasks."lint:links-in-modified-files-local"]
-description = "Lint links in modified files (local configuration)"
-run = "mise run lint:links-in-modified-files --base origin/main --head HEAD"
-
-[tasks."lint:rest"]
-description = "All lints not covered by super linter"
-depends = ["lint:bom", "lint:local-links", "lint:links-in-modified-files-local"]
-
-[tasks."lint:rest-ci"]
-description = "All lints not covered by super linter (CI configuration)"
-depends = ["lint:bom", "lint:local-links", "lint:links-in-modified-files-ci"]
-
-[tasks."lint:all"]
-description = "All lints"
-depends = ["lint:rest", "lint:super-linter"]
+[tasks.fix]
+description = "Auto-fix lint issues"
+run = "AUTOFIX=true mise run lint"
 
 [tasks.acceptance-test]
 description = "Run OATs acceptance tests"