cloudflare/pint
Publicmirrored from https://github.com/cloudflare/pintAvailable
internal/parser/read.go
185lines · modecode
| 1 | package parser |
| 2 | |
| 3 | import ( |
| 4 | "bufio" |
| 5 | "io" |
| 6 | "strings" |
| 7 | |
| 8 | "github.com/cloudflare/pint/internal/comments" |
| 9 | "github.com/cloudflare/pint/internal/diags" |
| 10 | ) |
| 11 | |
| 12 | type skipMode uint8 |
| 13 | |
| 14 | const ( |
| 15 | skipNone skipMode = iota |
| 16 | skipNextLine |
| 17 | skipBegin |
| 18 | skipEnd |
| 19 | skipCurrentLine |
| 20 | skipFile |
| 21 | ) |
| 22 | |
| 23 | func newContentReader(r io.Reader) *ContentReader { |
| 24 | return &ContentReader{ |
| 25 | src: bufio.NewReader(r), |
| 26 | buf: nil, |
| 27 | lines: make([]string, 0, 100), |
| 28 | comments: nil, |
| 29 | diagnostics: nil, |
| 30 | lineno: 0, |
| 31 | skipAll: false, |
| 32 | skipNext: false, |
| 33 | autoReset: false, |
| 34 | inBegin: false, |
| 35 | } |
| 36 | } |
| 37 | |
| 38 | type ContentReader struct { |
| 39 | src *bufio.Reader |
| 40 | buf []byte |
| 41 | comments []comments.Comment |
| 42 | diagnostics []diags.Diagnostic |
| 43 | lines []string |
| 44 | lineno int |
| 45 | |
| 46 | skipAll bool |
| 47 | skipNext bool |
| 48 | autoReset bool |
| 49 | inBegin bool |
| 50 | } |
| 51 | |
| 52 | func (r *ContentReader) Read(b []byte) (got int, err error) { |
| 53 | for got < cap(b) && err == nil { |
| 54 | if len(r.buf) == 0 { |
| 55 | err = r.readNextLine() |
| 56 | } |
| 57 | n := copy(b[got:], r.buf) |
| 58 | r.buf = r.buf[n:] |
| 59 | got += n |
| 60 | } |
| 61 | if err != nil && len(r.buf) > 0 { |
| 62 | err = nil |
| 63 | } |
| 64 | return got, err |
| 65 | } |
| 66 | |
| 67 | func (r *ContentReader) readNextLine() (err error) { |
| 68 | r.buf, err = r.src.ReadBytes('\n') |
| 69 | if len(r.buf) == 0 { |
| 70 | return err |
| 71 | } |
| 72 | |
| 73 | r.lineno++ |
| 74 | r.parseComments() |
| 75 | r.lines = append(r.lines, strings.TrimSuffix(string(r.buf), "\n")) |
| 76 | return err |
| 77 | } |
| 78 | |
| 79 | func (r *ContentReader) parseComments() { |
| 80 | lineComments := comments.Parse(r.lineno, string(r.buf)) |
| 81 | |
| 82 | if r.skipAll { |
| 83 | r.emptyCurrentLine(lineComments) |
| 84 | return |
| 85 | } |
| 86 | |
| 87 | var found bool |
| 88 | var skip skipMode |
| 89 | for _, comment := range lineComments { |
| 90 | // nolint:exhaustive |
| 91 | switch comment.Type { |
| 92 | case comments.IgnoreFileType: |
| 93 | skip = skipFile |
| 94 | found = true |
| 95 | r.diagnostics = append(r.diagnostics, diags.Diagnostic{ |
| 96 | Message: "This file was excluded from pint checks.", |
| 97 | Pos: diags.PositionRanges{ |
| 98 | { |
| 99 | Line: r.lineno, |
| 100 | FirstColumn: comment.Offset + 1, |
| 101 | LastColumn: len(r.buf) - 1, |
| 102 | }, |
| 103 | }, |
| 104 | FirstColumn: comment.Offset + 1, |
| 105 | LastColumn: len(r.buf) - 1, |
| 106 | }) |
| 107 | case comments.IgnoreLineType: |
| 108 | skip = skipCurrentLine |
| 109 | found = true |
| 110 | case comments.IgnoreBeginType: |
| 111 | skip = skipBegin |
| 112 | found = true |
| 113 | case comments.IgnoreEndType: |
| 114 | skip = skipEnd |
| 115 | found = true |
| 116 | case comments.IgnoreNextLineType: |
| 117 | skip = skipNextLine |
| 118 | found = true |
| 119 | case comments.FileOwnerType: |
| 120 | r.comments = append(r.comments, comment) |
| 121 | case comments.RuleOwnerType: |
| 122 | // pass |
| 123 | case comments.FileDisableType: |
| 124 | r.comments = append(r.comments, comment) |
| 125 | case comments.DisableType: |
| 126 | // pass |
| 127 | case comments.FileSnoozeType: |
| 128 | r.comments = append(r.comments, comment) |
| 129 | case comments.SnoozeType: |
| 130 | // pass |
| 131 | case comments.RuleSetType: |
| 132 | // pass |
| 133 | case comments.InvalidComment: |
| 134 | r.comments = append(r.comments, comment) |
| 135 | } |
| 136 | } |
| 137 | switch { |
| 138 | case found: |
| 139 | switch skip { // nolint: exhaustive |
| 140 | case skipFile: |
| 141 | r.emptyCurrentLine(lineComments) |
| 142 | r.skipNext = true |
| 143 | r.autoReset = false |
| 144 | r.skipAll = true |
| 145 | case skipCurrentLine: |
| 146 | r.emptyCurrentLine(lineComments) |
| 147 | if !r.inBegin { |
| 148 | r.skipNext = false |
| 149 | r.autoReset = true |
| 150 | } |
| 151 | case skipNextLine: |
| 152 | r.skipNext = true |
| 153 | r.autoReset = true |
| 154 | case skipBegin: |
| 155 | r.skipNext = true |
| 156 | r.autoReset = false |
| 157 | r.inBegin = true |
| 158 | case skipEnd: |
| 159 | r.skipNext = false |
| 160 | r.autoReset = true |
| 161 | r.inBegin = false |
| 162 | } |
| 163 | case r.skipNext: |
| 164 | r.emptyCurrentLine(lineComments) |
| 165 | if r.autoReset { |
| 166 | r.skipNext = false |
| 167 | } |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | func (r *ContentReader) emptyCurrentLine(comments []comments.Comment) { |
| 172 | offset := len(r.buf) |
| 173 | for _, c := range comments { |
| 174 | offset = c.Offset |
| 175 | break |
| 176 | } |
| 177 | for i := range r.buf { |
| 178 | if r.buf[i] == '\n' { |
| 179 | continue |
| 180 | } |
| 181 | if i < offset || r.inBegin { |
| 182 | r.buf[i] = ' ' |
| 183 | } |
| 184 | } |
| 185 | } |
| 186 | |