Initial code migration

Migrate code from https://github.com/prometheus/common/sigv4.

Signed-off-by: SuperQ <[email protected]>

.circleci/config.yml

@@ -0,0 +1,105 @@
+---
+version: 2.1
+
+orbs:
+  go: circleci/[email protected]
+
+jobs:
+  test:
+    parameters:
+      go_version:
+        type: string
+      use_gomod_cache:
+        type: boolean
+        default: true
+    docker:
+      - image: cimg/go:<< parameters.go_version >>
+    environment:
+      # Override Go 1.18 security deprecations.
+      GODEBUG: "x509sha1=1,tls10default=1"
+    steps:
+      - checkout
+      - when:
+          condition: << parameters.use_gomod_cache >>
+          steps:
+            - go/load-cache:
+                key: v1-go<< parameters.go_version >>
+      - run: make test
+      - when:
+          condition: << parameters.use_gomod_cache >>
+          steps:
+            - go/save-cache:
+                key: v1-go<< parameters.go_version >>
+      - store_test_results:
+          path: test-results
+  test-assets:
+    parameters:
+      go_version:
+        type: string
+      use_gomod_cache:
+        type: boolean
+        default: true
+    docker:
+      - image: cimg/go:<< parameters.go_version >>
+    steps:
+      - checkout
+      - when:
+          condition: << parameters.use_gomod_cache >>
+          steps:
+            - go/load-cache:
+                key: v1-go<< parameters.go_version >>
+      - run: make -C assets test
+      - when:
+          condition: << parameters.use_gomod_cache >>
+          steps:
+            - go/save-cache:
+                key: v1-go<< parameters.go_version >>
+      - store_test_results:
+          path: test-results
+  style:
+    parameters:
+      go_version:
+        type: string
+      use_gomod_cache:
+        type: boolean
+        default: true
+    docker:
+      - image: cimg/go:<< parameters.go_version >>
+    steps:
+      - checkout
+      - when:
+          condition: << parameters.use_gomod_cache >>
+          steps:
+            - go/load-cache:
+                key: v1-go<< parameters.go_version >>
+      - run: make style
+      - when:
+          condition: << parameters.use_gomod_cache >>
+          steps:
+            - go/save-cache:
+                key: v1-go<< parameters.go_version >>
+      - store_test_results:
+          path: test-results
+
+workflows:
+  version: 2
+  tests:
+    jobs:
+      # Supported Go versions are synced with github.com/prometheus/client_golang.
+      - test:
+          name: go-<< matrix.go_version >>
+          matrix:
+            parameters:
+              go_version:
+                - "1.21"
+                - "1.22"
+                - "1.23"
+      - test-assets:
+          name: assets-go-<< matrix.go_version >>
+          matrix:
+            parameters:
+              go_version:
+                - "1.23"
+      - style:
+          name: style
+          go_version: "1.23"

.github/dependabot.yml

@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: monthly
+  - package-ecosystem: "gomod"
+    directory: "/sigv4"
+    schedule:
+      interval: monthly

.github/workflows/golangci-lint.yml

@@ -0,0 +1,39 @@
+---
+# This action is synced from https://github.com/prometheus/prometheus
+name: golangci-lint
+on:
+  push:
+    paths:
+      - "go.sum"
+      - "go.mod"
+      - "**.go"
+      - "scripts/errcheck_excludes.txt"
+      - ".github/workflows/golangci-lint.yml"
+      - ".golangci.yml"
+  pull_request:
+
+permissions:  # added using https://github.com/step-security/secure-repo
+  contents: read
+
+jobs:
+  golangci:
+    permissions:
+      contents: read  # for actions/checkout to fetch code
+      pull-requests: read  # for golangci/golangci-lint-action to fetch pull requests
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0
+      - name: Install Go
+        uses: actions/setup-go@0a12ed9d6a96ab950c8f026ed9f722fe0da7ef32 # v5.0.2
+        with:
+          go-version: 1.23.x
+      - name: Install snmp_exporter/generator dependencies
+        run: sudo apt-get update && sudo apt-get -y install libsnmp-dev
+        if: github.repository == 'prometheus/snmp_exporter'
+      - name: Lint
+        uses: golangci/golangci-lint-action@aaa42aa0628b4ae2578232a66b541047968fac86 # v6.1.0
+        with:
+          args: --verbose
+          version: v1.60.2

.golangci.yml

@@ -0,0 +1,41 @@
+issues:
+  max-issues-per-linter: 0
+  max-same-issues: 0
+linters:
+  enable:
+    - errcheck
+    - errorlint
+    - gofumpt
+    - goimports
+    - gosimple
+    - govet
+    - ineffassign
+    - misspell
+    - revive
+    - staticcheck
+    - testifylint
+    - unused
+linters-settings:
+  goimports:
+    local-prefixes: github.com/prometheus/sigv4
+  revive:
+    rules:
+      # https://github.com/mgechev/revive/blob/master/RULES_DESCRIPTIONS.md#unused-parameter
+      - name: unused-parameter
+        severity: warning
+        disabled: true
+  testifylint:
+    disable:
+      - float-compare
+      - go-require
+    enable:
+      - bool-compare
+      - compares
+      - empty
+      - error-is-as
+      - error-nil
+      - expected-actual
+      - len
+      - require-error
+      - suite-dont-use-pkg
+      - suite-extra-assert-call

.yamllint

@@ -0,0 +1,27 @@
+---
+extends: default
+
+rules:
+  braces:
+    max-spaces-inside: 1
+    level: error
+  brackets:
+    max-spaces-inside: 1
+    level: error
+  commas: disable
+  comments: disable
+  comments-indentation: disable
+  document-start: disable
+  indentation:
+    spaces: consistent
+  key-duplicates:
+    ignore: |
+      config/testdata/section_key_dup.bad.yml
+  line-length: disable
+  truthy:
+    ignore: |
+      .github/workflows/codeql-analysis.yml
+      .github/workflows/funcbench.yml
+      .github/workflows/fuzzing.yml
+      .github/workflows/prombench.yml
+      .github/workflows/golangci-lint.yml

CONTRIBUTING.md

@@ -0,0 +1,18 @@
+# Contributing
+
+Prometheus uses GitHub to manage reviews of pull requests.
+
+* If you have a trivial fix or improvement, go ahead and create a pull request,
+  addressing (with `@...`) the maintainer of this repository (see
+  [MAINTAINERS.md](MAINTAINERS.md)) in the description of the pull request.
+
+* If you plan to do something more involved, first discuss your ideas
+  on our [mailing list](https://groups.google.com/forum/?fromgroups#!forum/prometheus-developers).
+  This will avoid unnecessary work and surely give you and us a good deal
+  of inspiration.
+
+* Relevant coding style guidelines are the [Go Code Review
+  Comments](https://code.google.com/p/go-wiki/wiki/CodeReviewComments)
+  and the _Formatting and style_ section of Peter Bourgon's [Go: Best
+  Practices for Production
+  Environments](http://peter.bourgon.org/go-in-production/#formatting-and-style).

MAINTAINERS.md

@@ -0,0 +1,2 @@
+* Julien Pivotto <[email protected]> @roidelapluie
+* Josue (Josh) Abreu <[email protected]> @gotjosh

Makefile

@@ -0,0 +1,17 @@
+# Copyright 2018 The Prometheus Authors
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+include Makefile.common
+
+.PHONY: test
+test:: deps check_license unused common-test lint