| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package pipeline |
| 4 | |
| 5 | import ( |
| 6 | "maps" |
| 7 | "regexp" |
| 8 | "strconv" |
| 9 | "text/template" |
| 10 | |
| 11 | "github.com/netdata/netdata/go/plugins/pkg/matcher" |
| 12 | |
| 13 | "github.com/Masterminds/sprig/v3" |
| 14 | "github.com/bmatcuk/doublestar/v4" |
| 15 | "gopkg.in/yaml.v2" |
| 16 | ) |
| 17 | |
| 18 | func newFuncMap() template.FuncMap { |
| 19 | fm := sprig.TxtFuncMap() |
| 20 | |
| 21 | extra := map[string]any{ |
| 22 | "match": funcMatchAny, |
| 23 | "glob": func(value, pattern string, patterns ...string) bool { |
| 24 | return funcMatchAny("glob", value, pattern, patterns...) |
| 25 | }, |
| 26 | "promPort": func(port string) string { |
| 27 | v, _ := strconv.Atoi(port) |
| 28 | return prometheusPortAllocations[v] |
| 29 | }, |
| 30 | "toYaml": func(v any) (string, error) { |
| 31 | bs, err := yaml.Marshal(v) |
| 32 | return string(bs), err |
| 33 | }, |
| 34 | } |
| 35 | |
| 36 | maps.Copy(fm, extra) |
| 37 | |
| 38 | return fm |
| 39 | } |
| 40 | |
| 41 | func funcMatchAny(typ, value, pattern string, patterns ...string) bool { |
| 42 | switch len(patterns) { |
| 43 | case 0: |
| 44 | return funcMatch(typ, value, pattern) |
| 45 | default: |
| 46 | return funcMatch(typ, value, pattern) || funcMatchAny(typ, value, patterns[0], patterns[1:]...) |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | func funcMatch(typ string, value, pattern string) bool { |
| 51 | switch typ { |
| 52 | case "glob", "": |
| 53 | m, err := matcher.NewGlobMatcher(pattern) |
| 54 | return err == nil && m.MatchString(value) |
| 55 | case "sp": |
| 56 | m, err := matcher.NewSimplePatternsMatcher(pattern) |
| 57 | return err == nil && m.MatchString(value) |
| 58 | case "re": |
| 59 | ok, err := regexp.MatchString(pattern, value) |
| 60 | return err == nil && ok |
| 61 | case "dstar": |
| 62 | ok, err := doublestar.Match(pattern, value) |
| 63 | return err == nil && ok |
| 64 | default: |
| 65 | return false |
| 66 | } |
| 67 | } |