Create initial Skeleton of the shipper and gRPC service (#18)

* init commit

* format, cleanup

* rename protobuf dir, add lint

* make linter mostly happy

* move to auto-generated linter file

* more linter cleanup, see if we can get ci working

* add file skips to ci

* update magefile

.github/workflows/golangci-lint.yml

@@ -0,0 +1,56 @@
+name: golangci-lint
+on:
+  pull_request:
+permissions:
+  contents: read
+  # Optional: allow read access to pull request. Use with `only-new-issues` option.
+  pull-requests: read
+jobs:
+  golangci:
+    strategy:
+      matrix:
+        include:
+          - GOOS: windows
+          - GOOS: linux
+          - GOOS: darwin
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Echo details
+        env:
+          GOOS: ${{ matrix.GOOS }}
+        run: echo Go GOOS=$GOOS
+
+      - uses: actions/checkout@v2
+
+      # Uses Go version from the repository.
+      - name: Read .go-version file
+        id: goversion
+        run: echo "::set-output name=version::$(cat .go-version)"
+
+      - uses: actions/setup-go@v2
+        with:
+          go-version: "${{ steps.goversion.outputs.version }}"
+
+      - name: golangci-lint
+        env:
+          GOOS: ${{ matrix.GOOS }}
+        uses: golangci/golangci-lint-action@v2
+        with:
+          # Optional: version of golangci-lint to use in form of v1.2 or v1.2.3 or `latest` to use the latest version
+          version: v1.44.2
+
+          # Give the job more time to execute.
+          # Regarding `--whole-files`, the linter is supposed to support linting of changed a patch only but,
+          # for some reason, it's very unreliable this way - sometimes it does not report any or some
+          # issues without linting the whole files, so we have to use `--whole-files`
+          # which can lead to some frustration from developers who would like to
+          # fix a single line in an existing codebase and the linter would force them
+          # into fixing all linting issues in the whole file instead
+          args: --timeout=30m --whole-files
+
+          # Optional: if set to true then the action will use pre-installed Go.
+          skip-go-installation: true
+
+          # Optional: show only new issues if it's a pull request. The default value is `false`.
+          only-new-issues: true

.gitignore

@@ -0,0 +1,53 @@
+# Directories
+/.vagrant
+/.idea
+/.vscode
+/build
+/*/*.template*.json
+**/html_docs
+data
+
+
+# Files
+.DS_Store
+/beats.iml
+*.dev.yml
+*.generated.yml
+coverage.out
+.python-version
+beat.db
+*.keystore
+go_env.properties
+mage_output_file.go
+
+fleet.yml
+
+# Editor swap files
+*.swp
+*.swo
+*.swn
+
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+*.exe
+*.test
+*.prof
+*.pyc
+
+# Terraform
+*.terraform
+*.tfstate*
+
+# Files generated with the bump version automations
+*.bck
+
+
+# agent
+build/
+elastic-agent-shipper
+
+
+# VSCode
+/.vscode

.go-version

@@ -0,0 +1 @@
+1.17.8

.golangci.yml

@@ -0,0 +1,174 @@
+# DO NOT EDIT!
+# This file is a rendered template, the source can be found in "./dev-tools/templates/.golangci.yml"
+#
+# options for analysis running
+run:
+  # timeout for analysis, e.g. 30s, 5m, default is 1m
+  timeout: 15m
+
+issues:
+  # Maximum count of issues with the same text.
+  # Set to 0 to disable.
+  # Default: 3
+  max-same-issues: 3
+  # Maximum issues count per one linter.
+  # Set to 0 to disable.
+  # Default: 50
+  max-issues-per-linter: 50
+  exclude-rules:
+    # Exclude package name contains '-' issue because we have at least one package with
+    # it on its name.
+    - text: "ST1003:"
+      linters:
+        - stylecheck
+
+output:
+  sort-results: true
+
+# Uncomment and add a path if needed to exclude
+# skip-dirs:
+#   - some/path
+skip-files:
+  - "*.*pb.go"
+
+# Find the whole list here https://golangci-lint.run/usage/linters/
+linters:
+  disable-all: true
+  enable:
+    - deadcode # finds unused code
+    - errcheck # checking for unchecked errors in go programs
+    - errorlint # errorlint is a linter for that can be used to find code that will cause problems with the error wrapping scheme introduced in Go 1.13.
+    - goconst # finds repeated strings that could be replaced by a constant
+    - dupl # tool for code clone detection
+    - forbidigo # forbids identifiers	matched by reg exps
+    - gosimple # linter for Go source code that specializes in simplifying a code
+    - misspell # finds commonly misspelled English words in comments
+    - nakedret # finds naked returns in functions greater than a specified function length
+    - prealloc # finds slice declarations that could potentially be preallocated
+    - nolintlint # reports ill-formed or insufficient nolint directives
+    - staticcheck # Staticcheck is a go vet on steroids, applying a ton of static analysis checks
+    - stylecheck # a replacement for golint
+    - unparam # reports unused function parameters
+    - unused # checks Go code for unused constants, variables, functions and types
+
+    - govet # Vet examines Go source code and reports suspicious constructs, such as Printf calls whose arguments do not align with the format string
+    - ineffassign # detects when assignments to existing variables are not used
+    - structcheck # finds unused struct fields
+    - typecheck # Like the front-end of a Go compiler, parses and type-checks Go code
+    - varcheck # Finds unused global variables and constants
+    - asciicheck # simple linter to check that your code does not contain non-ASCII identifiers
+    - bodyclose # checks whether HTTP response body is closed successfully
+    - durationcheck # check for two durations multiplied together
+    - exportloopref # checks for pointers to enclosing loop variables
+    - goimports # Goimports does everything that gofmt does. Additionally it checks unused imports
+    - gosec # inspects source code for security problems
+    - importas # enforces consistent import aliases
+    - nilerr # finds the code that returns nil even if it checks that the error is not nil.
+    - noctx # noctx finds sending http request without context.Context
+    - unconvert # Remove unnecessary type conversions
+    - wastedassign # wastedassign finds wasted assignment statements.
+    - godox # tool for detection of FIXME, TODO and other comment keywords
+    - gomodguard # check for blocked dependencies
+
+# all available settings of specific linters
+linters-settings:
+  errcheck:
+    # report about not checking of errors in type assertions: `a := b.(MyStruct)`;
+    # default is false: such cases aren't reported by default.
+    check-type-assertions: true
+
+  errorlint:
+    # Check whether fmt.Errorf uses the %w verb for formatting errors. See the readme for caveats
+    errorf: true
+    # Check for plain type assertions and type switches
+    asserts: true
+    # Check for plain error comparisons
+    comparison: true
+
+  goconst:
+    # minimal length of string constant, 3 by default
+    min-len: 3
+    # minimal occurrences count to trigger, 3 by default
+    min-occurrences: 2
+
+  dupl:
+    # tokens count to trigger issue, 150 by default
+    threshold: 100
+
+  forbidigo:
+    # Forbid the following identifiers
+    forbid:
+      - fmt.Print.* # too much log noise
+    # Exclude godoc examples from forbidigo checks.  Default is true.
+    exclude_godoc_examples: true
+
+  goimports:
+    local-prefixes: github.com/elastic
+
+  gomodguard:
+    blocked:
+      # List of blocked modules.
+      modules:
+        # Blocked module.
+        - github.com/pkg/errors:
+            # Recommended modules that should be used instead. (Optional)
+            recommendations:
+              - errors
+              - fmt
+            reason: "This package is deprecated, use `fmt.Errorf` with `%w` instead"
+
+  gosimple:
+    # Select the Go version to target. The default is '1.13'.
+    go: "1.17.8"
+
+  misspell:
+    # Correct spellings using locale preferences for US or UK.
+    # Default is to use a neutral variety of English.
+    # Setting locale to US will correct the British spelling of 'colour' to 'color'.
+    # locale: US
+    # ignore-words:
+    #   - IdP
+
+  nakedret:
+    # make an issue if func has more lines of code than this setting and it has naked returns; default is 30
+    max-func-lines: 0
+
+  prealloc:
+    # Report preallocation suggestions only on simple loops that have no returns/breaks/continues/gotos in them.
+    # True by default.
+    simple: true
+    range-loops: true # Report preallocation suggestions on range loops, true by default
+    for-loops: false # Report preallocation suggestions on for loops, false by default
+
+  nolintlint:
+    # Enable to ensure that nolint directives are all used. Default is true.
+    allow-unused: false
+    # Disable to ensure that nolint directives don't have a leading space. Default is true.
+    allow-leading-space: false
+    # Exclude following linters from requiring an explanation.  Default is [].
+    allow-no-explanation: []
+    # Enable to require an explanation of nonzero length after each nolint directive. Default is false.
+    require-explanation: true
+    # Enable to require nolint directives to mention the specific linter being suppressed. Default is false.
+    require-specific: false
+
+  staticcheck:
+    # Select the Go version to target. The default is '1.13'.
+    go: "1.17.8"
+    checks: ["all"]
+
+  stylecheck:
+    # Select the Go version to target. The default is '1.13'.
+    go: "1.17.8"
+    checks: ["all"]
+
+  unparam:
+    # Inspect exported functions, default is false. Set to true if no external program/library imports your code.
+    # XXX: if you enable this setting, unparam will report a lot of false-positives in text editors:
+    # if it's called for subdir of a project it can't find external interfaces. All text editor integrations
+    # with golangci-lint call it on a directory with the changed file.
+    check-exported: false
+
+  unused:
+    # Select the Go version to target. The default is '1.13'.
+    go: "1.17.8"