feat(lint): Show human readable output by default (#6625)

We were always showing the linting sarif output from the CLI. Instead
default to the human readable version and request the machine readable
one from workflows

---

### Changes are visible to end-users: yes

- Searched for relevant documentation and updated as needed: no
- Breaking change (forces users to change their own code or config): yes
- Suggested release notes appear below: yes

The CLI now outputs linting results in human readable form by default.
To get the machine readable version, use the `--machine` flag

### Test plan

- Manual testing; please provide instructions so we can reproduce:

Running against aspect-build/bazel-examples#346
with and without `--machine`

GitOrigin-RevId: b1915d8dc8b5406c7e09ed499a38792f4af10f42

pkg/aspect/lint/bep.go

@@ -144,7 +144,7 @@ func (runner *LintBEPHandler) bepEventCallback(event *buildeventstream.BuildEven
 								result.mnemonic = mnemonic
 							}
 							result.patchFile = file
-						} else if outputGroup.Name == LINT_MACHINE_GROUP {
+						} else if outputGroup.Name == LINT_REPORT_GROUP_MACHINE {
 							if mnemonic := parseLinterMnemonicFromFilename(file.Name); mnemonic != "" {
 								result.mnemonic = mnemonic
 							}
@@ -153,6 +153,15 @@ func (runner *LintBEPHandler) bepEventCallback(event *buildeventstream.BuildEven
 							} else if strings.HasSuffix(file.Name, ".exit_code") {
 								result.exitCodeFile = file
 							}
+						} else if outputGroup.Name == LINT_REPORT_GROUP_HUMAN {
+							if mnemonic := parseLinterMnemonicFromFilename(file.Name); mnemonic != "" {
+								result.mnemonic = mnemonic
+							}
+							if strings.HasSuffix(file.Name, ".out") {
+								result.reportFile = file
+							} else if strings.HasSuffix(file.Name, ".exit_code") {
+								result.exitCodeFile = file
+							}
 						}
 					}
 				}

pkg/aspect/lint/lint.go

@@ -62,11 +62,12 @@ type Linter struct {
 
 // Align with rules_lint
 const (
-	LINT_MACHINE_GROUP = "rules_lint_machine"
-	LINT_PATCH_GROUP   = "rules_lint_patch"
-	LINT_RESULT_REGEX  = ".*AspectRulesLint.*"
-	HISTOGRAM_CHARS    = 20
-	MAX_FILENAME_WIDTH = 80
+	LINT_REPORT_GROUP_HUMAN   = "rules_lint_human"
+	LINT_REPORT_GROUP_MACHINE = "rules_lint_machine"
+	LINT_PATCH_GROUP          = "rules_lint_patch"
+	LINT_RESULT_REGEX         = ".*AspectRulesLint.*"
+	HISTOGRAM_CHARS           = 20
+	MAX_FILENAME_WIDTH        = 80
 )
 
 func New(
@@ -85,6 +86,7 @@ func AddFlags(flags *pflag.FlagSet) {
 	flags.Bool("fix", false, "Apply all patch fixes for lint violations")
 	flags.Bool("diff", false, "Show unified diff instead of diff stats for fixes")
 	flags.Bool("report", true, "Output lint reports")
+	flags.Bool("machine", false, "Request the machine readable output from linters")
 }
 
 // TODO: hoist this to a flags package so it can be used by other commands that require this functionality
@@ -158,6 +160,7 @@ lint:
 	applyAll, _ := cmd.Flags().GetBool("fix")
 	showDiff, _ := cmd.Flags().GetBool("diff")
 	printReport, _ := cmd.Flags().GetBool("report")
+	machine, _ := cmd.Flags().GetBool("machine")
 
 	// Separate out the lint command specific flags from the list of args to
 	// pass to `bazel build`
@@ -183,7 +186,11 @@ lint:
 		outputGroups = append(outputGroups, LINT_PATCH_GROUP)
 	}
 	if printReport {
-		outputGroups = append(outputGroups, LINT_MACHINE_GROUP)
+		if machine {
+			outputGroups = append(outputGroups, LINT_REPORT_GROUP_MACHINE)
+		} else {
+			outputGroups = append(outputGroups, LINT_REPORT_GROUP_HUMAN)
+		}
 	}
 
 	bazelCmd = append(bazelCmd, fmt.Sprintf("--output_groups=%s", strings.Join(outputGroups, ",")))