feat: add & remove default filter(s) to analyze.

Signed-off-by: Matthis Holleville <matthish29@gmail.com>

README.md

@@ -47,7 +47,7 @@ If you install gcc as suggested, the problem will persist. Therefore, you need t
 * Currently the default AI provider is OpenAI, you will need to generate an API key from [OpenAI](https://openai.com)
   * You can do this by running `k8sgpt generate` to open a browser link to generate it
 * Run `k8sgpt auth` to set it in k8sgpt.
-* Run `k8sgpt filters` to manage filters.
+* Run `k8sgpt filters` to manage the default filters used by the analyzer. By default, all filters are executed during analysis.
 * Run `k8sgpt analyze` to run a scan.
 * And use `k8sgpt analyze --explain` to get a more detailed explanation of the issues.
 
@@ -92,18 +92,42 @@ Flags:
 Use "k8sgpt [command] --help" for more information about a command.
 ```
 
-_Run a scan with the default analyzers_
+_Manage filters_
+
+_List filters_
 
 ```
-k8sgpt generate
-k8sgpt auth
-k8sgpt analyze --explain
+k8sgpt filters list
 ```
 
-_List filters_
+_Add default filters_
 
 ```
-k8sgpt filters list
+k8sgpt filters add [filter(s)]
+```
+
+### Example :
+
+- Simple filter : `k8sgpt filters add Service`
+- Multiple filters : `k8sgpt filters add Ingress Pod`
+
+_Add default filters_
+
+```
+k8sgpt filters remove [filter(s)]
+```
+
+### Example :
+
+- Simple filter : `k8sgpt filters remove Service`
+- Multiple filters : `k8sgpt filters remove Ingress Pod`
+
+_Run a scan with the default analyzers_
+
+```
+k8sgpt generate
+k8sgpt auth
+k8sgpt analyze --explain
 ```
 
 _Filter on resource_

cmd/filters/filters.go

@@ -20,4 +20,6 @@ var FiltersCmd = &cobra.Command{
 
 func init() {
 	FiltersCmd.AddCommand(filterListCmd)
+	FiltersCmd.AddCommand(filtersAddCmd)
+	FiltersCmd.AddCommand(filtersRemoveCmd)
 }

cmd/filters/filtersAdd.go

@@ -0,0 +1,65 @@
+package filters
+
+import (
+	"os"
+	"strings"
+
+	"github.com/fatih/color"
+	"github.com/k8sgpt-ai/k8sgpt/pkg/analyzer"
+	"github.com/k8sgpt-ai/k8sgpt/pkg/util"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+var filtersAddCmd = &cobra.Command{
+	Use:   "add [filter(s)]",
+	Short: "Adds one or more new filters.",
+	Long:  `The add command adds one or more new filters to the default set of filters used by the analyze.`,
+	Args:  cobra.MinimumNArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+
+		// Verify filter exist
+		invalidFilters := []string{}
+		for _, f := range args {
+			foundFilter := false
+			for _, filter := range analyzer.ListFilters() {
+				if filter == f {
+					foundFilter = true
+					break
+				}
+			}
+			if !foundFilter {
+				invalidFilters = append(invalidFilters, f)
+			}
+		}
+
+		if len(invalidFilters) != 0 {
+			color.Red("Filter %s does not exist. Please use k8sgpt filters list", strings.Join(invalidFilters, ", "))
+			os.Exit(1)
+		}
+
+		// Get defined default_filters
+		defaultFilters := viper.GetStringSlice("default_filters")
+		if len(defaultFilters) == 0 {
+			defaultFilters = []string{}
+		}
+
+		mergedFilters := append(defaultFilters, args...)
+
+		uniqueFilters, dupplicateFilters := util.RemoveDuplicates(mergedFilters)
+
+		// Verify dupplicate
+		if len(dupplicateFilters) != 0 {
+			color.Red("Duplicate filters found: %s", strings.Join(dupplicateFilters, ", "))
+			os.Exit(1)
+		}
+
+		viper.Set("default_filters", uniqueFilters)
+
+		if err := viper.WriteConfig(); err != nil {
+			color.Red("Error writing config file: %s", err.Error())
+			os.Exit(1)
+		}
+		color.Green("Filter %s added", strings.Join(args, ", "))
+	},
+}

cmd/filters/filtersRemove.go

@@ -0,0 +1,62 @@
+package filters
+
+import (
+	"os"
+	"strings"
+
+	"github.com/fatih/color"
+	"github.com/k8sgpt-ai/k8sgpt/pkg/util"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+var filtersRemoveCmd = &cobra.Command{
+	Use:   "remove [filter(s)]",
+	Short: "Remove one or more filters.",
+	Long:  `The add command remove one or more filters to the default set of filters used by the analyze.`,
+	Args:  cobra.MinimumNArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+
+		// Get defined default_filters
+		defaultFilters := viper.GetStringSlice("default_filters")
+		if len(defaultFilters) == 0 {
+			defaultFilters = []string{}
+		}
+
+		// verify dupplicate filters example: k8sgpt filters remove Pod Pod
+		uniqueFilters, dupplicateFilters := util.RemoveDuplicates(args)
+		if len(dupplicateFilters) != 0 {
+			color.Red("Duplicate filters found: %s", strings.Join(dupplicateFilters, ", "))
+			os.Exit(1)
+		}
+
+		// Verify if filter exist in config file and update default_filter
+		filterNotFound := []string{}
+		for _, filter := range uniqueFilters {
+			foundFilter := false
+			for i, f := range defaultFilters {
+				if f == filter {
+					foundFilter = true
+					defaultFilters = append(defaultFilters[:i], defaultFilters[i+1:]...)
+					break
+				}
+			}
+			if !foundFilter {
+				filterNotFound = append(filterNotFound, filter)
+			}
+		}
+
+		if len(filterNotFound) != 0 {
+			color.Red("Filter(s) %s does not exist in configuration file. Please use k8sgpt filters add.", strings.Join(filterNotFound, ", "))
+			os.Exit(1)
+		}
+
+		viper.Set("default_filters", defaultFilters)
+
+		if err := viper.WriteConfig(); err != nil {
+			color.Red("Error writing config file: %s", err.Error())
+			os.Exit(1)
+		}
+		color.Green("Filter(s) %s removed", strings.Join(args, ", "))
+	},
+}

pkg/analyzer/analyzer.go

@@ -24,8 +24,10 @@ func RunAnalysis(ctx context.Context, filters []string, config *AnalysisConfigur
 	client *kubernetes.Client,
 	aiClient ai.IAI, analysisResults *[]Analysis) error {
 
-	// if there are no filters selected then run all of them
-	if len(filters) == 0 {
+	defaultFilters := viper.GetStringSlice("default_filters")
+
+	// if there are no filters selected and no default_filters then run all of them
+	if len(filters) == 0 && len(defaultFilters) == 0 {
 		for _, analyzer := range analyzerMap {
 			if err := analyzer(ctx, config, client, aiClient, analysisResults); err != nil {
 				return err
@@ -34,7 +36,20 @@ func RunAnalysis(ctx context.Context, filters []string, config *AnalysisConfigur
 		return nil
 	}
 
-	for _, filter := range filters {
+	// if the filters flag is specified
+	if len(filters) != 0 {
+		for _, filter := range filters {
+			if analyzer, ok := analyzerMap[filter]; ok {
+				if err := analyzer(ctx, config, client, aiClient, analysisResults); err != nil {
+					return err
+				}
+			}
+		}
+		return nil
+	}
+
+	// use default_filters
+	for _, filter := range defaultFilters {
 		if analyzer, ok := analyzerMap[filter]; ok {
 			if err := analyzer(ctx, config, client, aiClient, analysisResults); err != nil {
 				return err

pkg/util/util.go

@@ -65,3 +65,20 @@ func GetParent(client *kubernetes.Client, meta metav1.ObjectMeta) (string, bool)
 	}
 	return meta.Name, false
 }
+
+func RemoveDuplicates(slice []string) ([]string, []string) {
+	set := make(map[string]bool)
+	duplicates := []string{}
+	for _, val := range slice {
+		if _, ok := set[val]; !ok {
+			set[val] = true
+		} else {
+			duplicates = append(duplicates, val)
+		}
+	}
+	uniqueSlice := make([]string, 0, len(set))
+	for val := range set {
+		uniqueSlice = append(uniqueSlice, val)
+	}
+	return uniqueSlice, duplicates
+}