Remove now obsolete gometalinter and use golangci-lint instead

Signed-off-by: Silvin Lubecki <silvin.lubecki@docker.com>
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit b7e06f2845)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

.golangci.yml

@@ -0,0 +1,83 @@
+linters:
+  enable:
+    - bodyclose
+    - deadcode
+    - dogsled
+    - gocyclo
+    - goimports
+    - golint
+    - gosec
+    - gosimple
+    - govet
+    - ineffassign
+    - interfacer
+    - lll
+    - megacheck
+    - misspell
+    - nakedret
+    - staticcheck
+    - structcheck
+    - typecheck
+    - unconvert
+    - unparam
+    - unused
+    - varcheck
+
+  disable:
+    - errcheck
+
+run:
+  timeout: 5m
+  skip-dirs:
+    - cli/command/stack/kubernetes/api/openapi
+    - cli/command/stack/kubernetes/api/client
+  skip-files:
+    - cli/compose/schema/bindata.go
+    - .*generated.*
+
+linters-settings:
+  gocyclo:
+    min-complexity: 16
+  govet:
+    check-shadowing: false
+  lll:
+    line-length: 200
+  nakedret:
+    command: nakedret
+    pattern: ^(?P<path>.*?\\.go):(?P<line>\\d+)\\s*(?P<message>.*)$
+
+issues:
+  # The default exclusion rules are a bit too permissive, so copying the relevant ones below
+  exclude-use-default: false
+
+  exclude:
+    - parameter .* always receives
+
+  exclude-rules:
+    # These are copied from the default exclude rules, except for "ineffective break statement"
+    # and GoDoc checks.
+    # https://github.com/golangci/golangci-lint/blob/0cc87df732aaf1d5ad9ce9ca538d38d916918b36/pkg/config/config.go#L36
+    - text: "Error return value of .((os\\.)?std(out|err)\\..*|.*Close|.*Flush|os\\.Remove(All)?|.*printf?|os\\.(Un)?Setenv). is not checked"
+      linters:
+        - errcheck
+    - text: "func name will be used as test\\.Test.* by other packages, and that stutters; consider calling this"
+      linters:
+        - golint
+    - text: "G103: Use of unsafe calls should be audited"
+      linters:
+        - gosec
+    - text: "G104: Errors unhandled"
+      linters:
+        - gosec
+    - text: "G204: Subprocess launch(ed with (variable|function call)|ing should be audited)"
+      linters:
+        - gosec
+    - text: "(G301|G302): (Expect directory permissions to be 0750 or less|Expect file permissions to be 0600 or less)"
+      linters:
+        - gosec
+    - text: "G304: Potential file inclusion via variable"
+      linters:
+        - gosec
+    - text: "(G201|G202): SQL string (formatting|concatenation)"
+      linters:
+        - gosec

dockerfiles/Dockerfile.lint

@@ -1,20 +1,23 @@
+# syntax=docker/dockerfile:1.1.3-experimental
+
 ARG GO_VERSION=1.12.12
+ARG GOLANGCI_LINTER_SHA="v1.21.0"
 
-FROM    golang:${GO_VERSION}-alpine
+FROM    golang:${GO_VERSION}-alpine AS build
+ENV     CGO_ENABLED=0
+RUN     apk add --no-cache git
+ARG     GOLANGCI_LINTER_SHA
+ARG     GO111MODULE=on
+RUN --mount=type=cache,target=/root/.cache/go-build \
+    --mount=type=cache,target=/go/pkg/mod \
+        go get github.com/golangci/golangci-lint/cmd/golangci-lint@${GOLANGCI_LINTER_SHA}
 
-RUN     apk add -U git
-
-ARG     GOMETALINTER_SHA=v2.0.6
-RUN     go get -d github.com/alecthomas/gometalinter && \
-        cd /go/src/github.com/alecthomas/gometalinter && \
-        git checkout -q "$GOMETALINTER_SHA" && \
-        go build -v -o /usr/local/bin/gometalinter . && \ 
-        gometalinter --install && \
-        rm -rf /go/src/* /go/pkg/*
-
-WORKDIR /go/src/github.com/docker/cli
+FROM    golang:${GO_VERSION}-alpine AS lint
 ENV     CGO_ENABLED=0
 ENV     DISABLE_WARN_OUTSIDE_CONTAINER=1
-ENTRYPOINT ["/usr/local/bin/gometalinter"]
-CMD     ["--config=gometalinter.json", "./..."]
+COPY --from=build /go/bin/golangci-lint /usr/local/bin
+WORKDIR /go/src/github.com/docker/cli
+ENV     GOGC=75
+ENTRYPOINT ["/usr/local/bin/golangci-lint"]
+CMD     ["run", "--config=.golangci.yml"]
 COPY    . .

gometalinter.json

@@ -1,46 +0,0 @@
-{
-  "Vendor": true,
-  "Deadline": "3m",
-  "Sort": ["linter", "severity", "path", "line"],
-  "Skip": [
-      "cli/compose/schema/bindata.go",
-      "cli/command/stack/kubernetes/api/openapi",
-      "cli/command/stack/kubernetes/api/client",
-      ".*generated.*",
-      "vendor"
-  ],
-  "Exclude": [
-    "parameter .* always receives",
-    "_esc(Dir|FS|FSString|FSMustString) is unused"
-  ],
-  "EnableGC": true,
-  "Linters": {
-      "nakedret": {
-        "Command": "nakedret",
-        "Pattern": "^(?P<path>.*?\\.go):(?P<line>\\d+)\\s*(?P<message>.*)$"
-      }
-  },
-  "WarnUnmatchedDirective": true,
-
-  "DisableAll": true,
-  "Enable": [
-    "deadcode",
-    "gocyclo",
-    "gofmt",
-    "goimports",
-    "golint",
-    "gosimple",
-    "ineffassign",
-    "interfacer",
-    "lll",
-    "misspell",
-    "nakedret",
-    "unconvert",
-    "unparam",
-    "unused",
-    "vet"
-  ],
-
-  "Cyclo": 16,
-  "LineLength": 200
-}