cloudflare/pint
Publicmirrored from https://github.com/cloudflare/pintAvailable
internal/discovery/discovery.go
143lines · modecode
| 1 | package discovery |
| 2 | |
| 3 | import ( |
| 4 | "errors" |
| 5 | "os" |
| 6 | "regexp" |
| 7 | "strings" |
| 8 | |
| 9 | "github.com/prometheus/prometheus/model/rulefmt" |
| 10 | |
| 11 | "github.com/cloudflare/pint/internal/output" |
| 12 | "github.com/cloudflare/pint/internal/parser" |
| 13 | |
| 14 | "github.com/rs/zerolog/log" |
| 15 | ) |
| 16 | |
| 17 | const ( |
| 18 | FileOwnerComment = "file/owner" |
| 19 | RuleOwnerComment = "rule/owner" |
| 20 | ) |
| 21 | |
| 22 | var ignoredErrors = []string{ |
| 23 | "one of 'record' or 'alert' must be set", |
| 24 | "field 'expr' must be set in rule", |
| 25 | "could not parse expression: ", |
| 26 | "cannot unmarshal !!seq into rulefmt.ruleGroups", |
| 27 | ": template: __", |
| 28 | } |
| 29 | |
| 30 | func isStrictIgnored(err error) bool { |
| 31 | s := err.Error() |
| 32 | |
| 33 | werr := &rulefmt.WrappedError{} |
| 34 | if errors.As(err, &werr) { |
| 35 | if uerr := werr.Unwrap(); uerr != nil { |
| 36 | s = uerr.Error() |
| 37 | } |
| 38 | } |
| 39 | for _, ign := range ignoredErrors { |
| 40 | if strings.Contains(s, ign) { |
| 41 | return true |
| 42 | } |
| 43 | } |
| 44 | return false |
| 45 | } |
| 46 | |
| 47 | type RuleFinder interface { |
| 48 | Find() ([]Entry, error) |
| 49 | } |
| 50 | |
| 51 | type Entry struct { |
| 52 | Path string |
| 53 | PathError error |
| 54 | ModifiedLines []int |
| 55 | Rule parser.Rule |
| 56 | Owner string |
| 57 | } |
| 58 | |
| 59 | func readFile(path string, isStrict bool) (entries []Entry, err error) { |
| 60 | p := parser.NewParser() |
| 61 | |
| 62 | f, err := os.Open(path) |
| 63 | if err != nil { |
| 64 | return nil, err |
| 65 | } |
| 66 | |
| 67 | content, err := parser.ReadContent(f) |
| 68 | f.Close() |
| 69 | if err != nil { |
| 70 | return nil, err |
| 71 | } |
| 72 | |
| 73 | contentLines := []int{} |
| 74 | for i := 1; i <= strings.Count(string(content), "\n"); i++ { |
| 75 | contentLines = append(contentLines, i) |
| 76 | } |
| 77 | |
| 78 | fileOwner, _ := parser.GetComment(string(content), FileOwnerComment) |
| 79 | |
| 80 | if isStrict { |
| 81 | if _, errs := rulefmt.Parse(content); len(errs) > 0 { |
| 82 | for _, err := range errs { |
| 83 | if isStrictIgnored(err) { |
| 84 | continue |
| 85 | } |
| 86 | log.Error(). |
| 87 | Err(err). |
| 88 | Str("path", path). |
| 89 | Str("lines", output.FormatLineRangeString(contentLines)). |
| 90 | Msg("Failed to unmarshal file content") |
| 91 | entries = append(entries, Entry{ |
| 92 | Path: path, |
| 93 | PathError: err, |
| 94 | Owner: fileOwner.Value, |
| 95 | ModifiedLines: contentLines, |
| 96 | }) |
| 97 | } |
| 98 | if len(entries) > 0 { |
| 99 | return entries, nil |
| 100 | } |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | rules, err := p.Parse(content) |
| 105 | if err != nil { |
| 106 | log.Error(). |
| 107 | Err(err). |
| 108 | Str("path", path). |
| 109 | Str("lines", output.FormatLineRangeString(contentLines)). |
| 110 | Msg("Failed to parse file content") |
| 111 | entries = append(entries, Entry{ |
| 112 | Path: path, |
| 113 | PathError: err, |
| 114 | Owner: fileOwner.Value, |
| 115 | ModifiedLines: contentLines, |
| 116 | }) |
| 117 | return entries, nil |
| 118 | } |
| 119 | |
| 120 | for _, rule := range rules { |
| 121 | owner, ok := rule.GetComment(RuleOwnerComment) |
| 122 | if !ok { |
| 123 | owner = fileOwner |
| 124 | } |
| 125 | entries = append(entries, Entry{ |
| 126 | Path: path, |
| 127 | Rule: rule, |
| 128 | Owner: owner.Value, |
| 129 | }) |
| 130 | } |
| 131 | |
| 132 | log.Debug().Str("path", path).Int("rules", len(entries)).Msg("File parsed") |
| 133 | return entries, nil |
| 134 | } |
| 135 | |
| 136 | func matchesAny(re []*regexp.Regexp, s string) bool { |
| 137 | for _, r := range re { |
| 138 | if v := r.MatchString(s); v { |
| 139 | return true |
| 140 | } |
| 141 | } |
| 142 | return false |
| 143 | } |
| 144 | |