lint: enable custom linters from go-lint project

.custom-gcl.yaml

@@ -0,0 +1,10 @@
+# Builds a golangci-lint binary with the shared custom linters from go-lint.
+#
+# The version MUST stay in lockstep with the installed golangci-lint version:
+# plugins link against golangci-lint internals.
+version: v2.13.1
+name: golint
+destination: ./bin
+plugins:
+  - module: git.offline-twitter.com/offline-labs/go-lint
+    version: v0.0.0-20261018231414-f5b6076dce76

.golangci.yaml

@@ -20,7 +20,20 @@ linters:
     - whitespace
     - wrapcheck
 
+    # Shared custom linters from ../go-lint.
+    - ifinit
+    - boolnames
+
   settings:
+    custom:
+      ifinit:
+        type: module
+        description: if-statement init clauses must be on a single line
+      boolnames:
+        type: module
+        description: boolean variables and functions should use is, has, was, and similar prefixes
+        settings:
+          allowed_prefixes: ["is", "has", "can", "was", "should"]
     depguard:
       rules:
         main:

ops/build-lint.sh

@@ -0,0 +1,39 @@
+#!/usr/bin/env sh
+
+set -e
+
+SCRIPT_DIR=$(cd "$(dirname "$0")" && pwd)
+PROJECT_ROOT=$(cd "$SCRIPT_DIR/.." && pwd)
+cd "$PROJECT_ROOT" # .custom-gcl.yaml is only discovered in the project root.
+
+# go-lint is public, but the public checksum database has not indexed it yet.
+# Preserve existing exclusions while fetching the module through the normal
+# proxy-then-direct resolution path.
+export GONOSUMDB="${GONOSUMDB:+$GONOSUMDB,}git.offline-twitter.com"
+
+BIN="bin/golint"
+STAMP="bin/.golint.stamp"
+
+# The pinned plugin version is recorded in .custom-gcl.yaml.
+current_stamp() {
+    sha256sum .custom-gcl.yaml | cut -d' ' -f1
+}
+
+if [ "$1" = "--if-needed" ] &&
+   [ -x "$BIN" ] &&
+   [ -f "$STAMP" ] &&
+   [ "$(cat "$STAMP")" = "$(current_stamp)" ]; then
+    exit 0
+fi
+
+if ! [ -x "$(command -v golangci-lint)" ]; then
+    echo "golangci-lint is not installed. Please install it from https://golangci-lint.run/welcome/install/"
+    exit 1
+fi
+
+mkdir -p bin
+echo "Building golint (golangci-lint + shared custom linters)..."
+golangci-lint custom
+current_stamp > "$STAMP"
+
+echo "Done: $PROJECT_ROOT/$BIN"

ops/lint.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env sh
+
+set -e
+
+SCRIPT_DIR=$(cd "$(dirname "$0")" && pwd)
+PROJECT_ROOT=$(cd "$SCRIPT_DIR/.." && pwd)
+cd "$PROJECT_ROOT"
+
+./ops/build-lint.sh --if-needed
+GOLANGCI="./bin/golint"
+
+echo "Linting $(go list ./... | wc -w) packages"
+
+# Catches config keys in the wrong place, which are otherwise silently ignored.
+"$GOLANGCI" config verify
+"$GOLANGCI" run $@

pkg/db/migration_test.go

@@ -39,9 +39,9 @@ func assertForeignKeysAreGood(t *testing.T, conn *sqlx.DB) {
 	t.Helper()
 
 	// FKs should be enabled and intact at all times
-	var fkEnabled bool
-	require.NoError(t, conn.Get(&fkEnabled, `pragma foreign_keys`))
-	assert.True(t, fkEnabled)
+	var isFkEnabled bool
+	require.NoError(t, conn.Get(&isFkEnabled, `pragma foreign_keys`))
+	assert.True(t, isFkEnabled)
 	assert.NoError(t, db.PragmaForeignKeyCheck(conn))
 
 	// ...and enforcement should be in effect again, not merely reported as on

pkg/must/must.go

@@ -16,8 +16,8 @@ func Get[T any](val T, err error) T {
 	return val
 }
 
-func Be(condition bool, msg string, args ...any) {
-	if !condition {
+func Be(ok bool, msg string, args ...any) {
+	if !ok {
 		panic(fmt.Errorf(msg, args...)) //nolint:err113 // not a returned error
 	}
 }