Update golang versions everywhere, use alpine 3.13 for image, remove vendor dir.

master
Stanislav Nikitin 1 year ago
parent a0f896dc53
commit 79791ef228
Signed by: pztrn
GPG Key ID: 1E944A0F0568B550
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  5. 19
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  11. 267
      vendor/github.com/alecthomas/chroma/README.md
  12. 35
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  14. 137
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  17. 57
      vendor/github.com/alecthomas/chroma/formatters/api.go
  18. 435
      vendor/github.com/alecthomas/chroma/formatters/html/html.go
  19. 31
      vendor/github.com/alecthomas/chroma/formatters/json.go
  20. 51
      vendor/github.com/alecthomas/chroma/formatters/svg/font_liberation_mono.go
  21. 222
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  22. 18
      vendor/github.com/alecthomas/chroma/formatters/tokens.go
  23. 260
      vendor/github.com/alecthomas/chroma/formatters/tty_indexed.go
  24. 42
      vendor/github.com/alecthomas/chroma/formatters/tty_truecolour.go
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      vendor/github.com/alecthomas/chroma/go.mod
  26. 33
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  27. 76
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  28. 120
      vendor/github.com/alecthomas/chroma/lexer.go
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1
.gitignore vendored

@ -1,6 +1,7 @@
examples/fastpastebin.yaml
dist/
data/
vendor/
.idea
.vscode
*DS_Store*

@ -1,13 +1,13 @@
FROM golang:1.13.1-alpine AS build
FROM golang:1.16.5-alpine AS build
WORKDIR /fastpastebin
COPY . .
WORKDIR /fastpastebin/cmd/fastpastebin
RUN GOFLAGS="-mod=vendor" go build
RUN CGO_ENABLED=0 go build -tags netgo
FROM alpine:3.10
FROM alpine:3.13
LABEL maintainer "Stanislav N. <pztrn@pztrn.name>"
COPY --from=build /fastpastebin/cmd/fastpastebin/fastpastebin /app/fastpastebin

@ -5,7 +5,7 @@ volumes:
services:
database:
image: mariadb:10.3
image: mariadb:10.5
container_name: database
restart: always
volumes:

@ -1,6 +1,6 @@
module go.dev.pztrn.name/fastpastebin
go 1.13
go 1.16
require (
github.com/alecthomas/chroma v0.8.2

@ -1,19 +0,0 @@
# Binaries for programs and plugins
*.exe
*.dll
*.so
*.dylib
/cmd/chroma/chroma
# Test binary, build with `go test -c`
*.test
# Output of the go coverage tool, specifically when used with LiteIDE
*.out
# Project-local glide cache, RE: https://github.com/Masterminds/glide/issues/736
.glide/
_models/
_examples/

@ -1,55 +0,0 @@
run:
tests: true
skip-dirs:
- _examples
output:
print-issued-lines: false
linters:
enable-all: true
disable:
- maligned
- megacheck
- lll
- gocyclo
- dupl
- gochecknoglobals
- funlen
- godox
- wsl
- gomnd
- gocognit
linters-settings:
govet:
check-shadowing: true
gocyclo:
min-complexity: 10
dupl:
threshold: 100
goconst:
min-len: 8
min-occurrences: 3
issues:
max-per-linter: 0
max-same: 0
exclude-use-default: false
exclude:
# Captured by errcheck.
- '^(G104|G204):'
# Very commonly not checked.
- 'Error return value of .(.*\.Help|.*\.MarkFlagRequired|(os\.)?std(out|err)\..*|.*Close|.*Flush|os\.Remove(All)?|.*printf?|os\.(Un)?Setenv). is not checked'
- 'exported method (.*\.MarshalJSON|.*\.UnmarshalJSON|.*\.EntityURN|.*\.GoString|.*\.Pos) should have comment or be unexported'
- 'composite literal uses unkeyed fields'
- 'declaration of "err" shadows declaration'
- 'should not use dot imports'
- 'Potential file inclusion via variable'
- 'should have comment or be unexported'
- 'comment on exported var .* should be of the form'
- 'at least one file in a package should have a package comment'
- 'string literal contains the Unicode'
- 'methods on the same type should have the same receiver name'
- '_TokenType_name should be _TokenTypeName'
- '`_TokenType_map` should be `_TokenTypeMap`'

@ -1,33 +0,0 @@
project_name: chroma
release:
github:
owner: alecthomas
name: chroma
brews:
-
install: bin.install "chroma"
builds:
- goos:
- linux
- darwin
- windows
goarch:
- amd64
- "386"
goarm:
- "6"
main: ./cmd/chroma/main.go
ldflags: -s -w -X main.version={{.Version}} -X main.commit={{.Commit}} -X main.date={{.Date}}
binary: chroma
archives:
-
format: tar.gz
name_template: '{{ .Binary }}-{{ .Version }}-{{ .Os }}-{{ .Arch }}{{ if .Arm }}v{{
.Arm }}{{ end }}'
files:
- COPYING
- README*
snapshot:
name_template: SNAPSHOT-{{ .Commit }}
checksum:
name_template: '{{ .ProjectName }}-{{ .Version }}-checksums.txt'

@ -1,12 +0,0 @@
sudo: false
language: go
go:
- "1.13.x"
script:
- go test -v ./...
- curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | bash -s v1.22.2
- ./bin/golangci-lint run
- git clean -fdx .
after_success:
curl -sL https://git.io/goreleaser | bash && goreleaser

@ -1,19 +0,0 @@
Copyright (C) 2017 Alec Thomas
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

@ -1,19 +0,0 @@
.PHONY: chromad upload all
all: README.md tokentype_string.go
README.md: lexers/*/*.go
./table.py
tokentype_string.go: types.go
go generate
chromad:
(cd ./cmd/chromad && go get github.com/GeertJohan/go.rice/rice@master && go install github.com/GeertJohan/go.rice/rice)
rm -f chromad
(export CGOENABLED=0 GOOS=linux ; cd ./cmd/chromad && go build -o ../../chromad .)
rice append -i ./cmd/chromad --exec=./chromad
upload: chromad
scp chromad root@swapoff.org: && \
ssh root@swapoff.org 'install -m755 ./chromad /srv/http/swapoff.org/bin && service chromad restart'

@ -1,267 +0,0 @@
# Chroma — A general purpose syntax highlighter in pure Go [![Golang Documentation](https://godoc.org/github.com/alecthomas/chroma?status.svg)](https://godoc.org/github.com/alecthomas/chroma) [![Build Status](https://travis-ci.org/alecthomas/chroma.svg)](https://travis-ci.org/alecthomas/chroma) [![Gitter chat](https://badges.gitter.im/alecthomas.svg)](https://gitter.im/alecthomas/Lobby)
> **NOTE:** As Chroma has just been released, its API is still in flux. That said, the high-level interface should not change significantly.
Chroma takes source code and other structured text and converts it into syntax
highlighted HTML, ANSI-coloured text, etc.
Chroma is based heavily on [Pygments](http://pygments.org/), and includes
translators for Pygments lexers and styles.
<a id="markdown-table-of-contents" name="table-of-contents"></a>
## Table of Contents
<!-- TOC -->
1. [Table of Contents](#table-of-contents)
2. [Supported languages](#supported-languages)
3. [Try it](#try-it)
4. [Using the library](#using-the-library)
1. [Quick start](#quick-start)
2. [Identifying the language](#identifying-the-language)
3. [Formatting the output](#formatting-the-output)
4. [The HTML formatter](#the-html-formatter)
5. [More detail](#more-detail)
1. [Lexers](#lexers)
2. [Formatters](#formatters)
3. [Styles](#styles)
6. [Command-line interface](#command-line-interface)
7. [What's missing compared to Pygments?](#whats-missing-compared-to-pygments)
<!-- /TOC -->
<a id="markdown-supported-languages" name="supported-languages"></a>
## Supported languages
Prefix | Language
:----: | --------
A | ABAP, ABNF, ActionScript, ActionScript 3, Ada, Angular2, ANTLR, ApacheConf, APL, AppleScript, Arduino, Awk
B | Ballerina, Base Makefile, Bash, Batchfile, BlitzBasic, BNF, Brainfuck
C | C, C#, C++, Cap'n Proto, Cassandra CQL, Ceylon, CFEngine3, cfstatement, ChaiScript, Cheetah, Clojure, CMake, COBOL, CoffeeScript, Common Lisp, Coq, Crystal, CSS, Cython
D | D, Dart, Diff, Django/Jinja, Docker, DTD
E | EBNF, Elixir, Elm, EmacsLisp, Erlang
F | Factor, Fish, Forth, Fortran, FSharp
G | GAS, GDScript, Genshi, Genshi HTML, Genshi Text, GLSL, Gnuplot, Go, Go HTML Template, Go Text Template, GraphQL, Groovy
H | Handlebars, Haskell, Haxe, HCL, Hexdump, HTML, HTTP, Hy
I | Idris, INI, Io
J | J, Java, JavaScript, JSON, Julia, Jungle
K | Kotlin
L | Lighttpd configuration file, LLVM, Lua
M | Mako, markdown, Mason, Mathematica, Matlab, MiniZinc, MLIR, Modula-2, MonkeyC, MorrowindScript, Myghty, MySQL
N | NASM, Newspeak, Nginx configuration file, Nim, Nix
O | Objective-C, OCaml, Octave, OpenSCAD, Org Mode
P | PacmanConf, Perl, PHP, Pig, PkgConfig, PL/pgSQL, plaintext, PostgreSQL SQL dialect, PostScript, POVRay, PowerShell, Prolog, Protocol Buffer, Puppet, Python, Python 3
Q | QBasic
R | R, Racket, Ragel, react, reg, reStructuredText, Rexx, Ruby, Rust
S | Sass, Scala, Scheme, Scilab, SCSS, Smalltalk, Smarty, SML, Snobol, Solidity, SPARQL, SQL, SquidConf, Swift, SYSTEMD, systemverilog
T | TableGen, TASM, Tcl, Tcsh, Termcap, Terminfo, Terraform, TeX, Thrift, TOML, TradingView, Transact-SQL, Turing, Turtle, Twig, TypeScript, TypoScript, TypoScriptCssData, TypoScriptHtmlData
V | VB.net, verilog, VHDL, VimL, vue
W | WDTE
X | XML, Xorg
Y | YAML
_I will attempt to keep this section up to date, but an authoritative list can be
displayed with `chroma --list`._
<a id="markdown-try-it" name="try-it"></a>
## Try it
Try out various languages and styles on the [Chroma Playground](https://swapoff.org/chroma/playground/).
<a id="markdown-using-the-library" name="using-the-library"></a>
## Using the library
Chroma, like Pygments, has the concepts of
[lexers](https://github.com/alecthomas/chroma/tree/master/lexers),
[formatters](https://github.com/alecthomas/chroma/tree/master/formatters) and
[styles](https://github.com/alecthomas/chroma/tree/master/styles).
Lexers convert source text into a stream of tokens, styles specify how token
types are mapped to colours, and formatters convert tokens and styles into
formatted output.
A package exists for each of these, containing a global `Registry` variable
with all of the registered implementations. There are also helper functions
for using the registry in each package, such as looking up lexers by name or
matching filenames, etc.
In all cases, if a lexer, formatter or style can not be determined, `nil` will
be returned. In this situation you may want to default to the `Fallback`
value in each respective package, which provides sane defaults.
<a id="markdown-quick-start" name="quick-start"></a>
### Quick start
A convenience function exists that can be used to simply format some source
text, without any effort:
```go
err := quick.Highlight(os.Stdout, someSourceCode, "go", "html", "monokai")
```
<a id="markdown-identifying-the-language" name="identifying-the-language"></a>
### Identifying the language
To highlight code, you'll first have to identify what language the code is
written in. There are three primary ways to do that:
1. Detect the language from its filename.
```go
lexer := lexers.Match("foo.go")
```
3. Explicitly specify the language by its Chroma syntax ID (a full list is available from `lexers.Names()`).
```go
lexer := lexers.Get("go")
```
3. Detect the language from its content.
```go
lexer := lexers.Analyse("package main\n\nfunc main()\n{\n}\n")
```
In all cases, `nil` will be returned if the language can not be identified.
```go
if lexer == nil {
lexer = lexers.Fallback
}
```
At this point, it should be noted that some lexers can be extremely chatty. To
mitigate this, you can use the coalescing lexer to coalesce runs of identical
token types into a single token:
```go
lexer = chroma.Coalesce(lexer)
```
<a id="markdown-formatting-the-output" name="formatting-the-output"></a>
### Formatting the output
Once a language is identified you will need to pick a formatter and a style (theme).
```go
style := styles.Get("swapoff")
if style == nil {
style = styles.Fallback
}
formatter := formatters.Get("html")
if formatter == nil {
formatter = formatters.Fallback
}
```
Then obtain an iterator over the tokens:
```go
contents, err := ioutil.ReadAll(r)
iterator, err := lexer.Tokenise(nil, string(contents))
```
And finally, format the tokens from the iterator:
```go
err := formatter.Format(w, style, iterator)
```
<a id="markdown-the-html-formatter" name="the-html-formatter"></a>
### The HTML formatter
By default the `html` registered formatter generates standalone HTML with
embedded CSS. More flexibility is available through the `formatters/html` package.
Firstly, the output generated by the formatter can be customised with the
following constructor options:
- `Standalone()` - generate standalone HTML with embedded CSS.
- `WithClasses()` - use classes rather than inlined style attributes.
- `ClassPrefix(prefix)` - prefix each generated CSS class.
- `TabWidth(width)` - Set the rendered tab width, in characters.
- `WithLineNumbers()` - Render line numbers (style with `LineNumbers`).
- `LinkableLineNumbers()` - Make the line numbers linkable.
- `HighlightLines(ranges)` - Highlight lines in these ranges (style with `LineHighlight`).
- `LineNumbersInTable()` - Use a table for formatting line numbers and code, rather than spans.
If `WithClasses()` is used, the corresponding CSS can be obtained from the formatter with:
```go
formatter := html.New(html.WithClasses())
err := formatter.WriteCSS(w, style)
```
<a id="markdown-more-detail" name="more-detail"></a>
## More detail
<a id="markdown-lexers" name="lexers"></a>
### Lexers
See the [Pygments documentation](http://pygments.org/docs/lexerdevelopment/)
for details on implementing lexers. Most concepts apply directly to Chroma,
but see existing lexer implementations for real examples.
In many cases lexers can be automatically converted directly from Pygments by
using the included Python 3 script `pygments2chroma.py`. I use something like
the following:
```sh
python3 ~/Projects/chroma/_tools/pygments2chroma.py \
pygments.lexers.jvm.KotlinLexer \
> ~/Projects/chroma/lexers/kotlin.go \
&& gofmt -s -w ~/Projects/chroma/lexers/*.go
```
See notes in [pygments-lexers.go](https://github.com/alecthomas/chroma/blob/master/pygments-lexers.txt)
for a list of lexers, and notes on some of the issues importing them.
<a id="markdown-formatters" name="formatters"></a>
### Formatters
Chroma supports HTML output, as well as terminal output in 8 colour, 256 colour, and true-colour.
A `noop` formatter is included that outputs the token text only, and a `tokens`
formatter outputs raw tokens. The latter is useful for debugging lexers.
<a id="markdown-styles" name="styles"></a>
### Styles
Chroma styles use the [same syntax](http://pygments.org/docs/styles/) as Pygments.
All Pygments styles have been converted to Chroma using the `_tools/style.py` script.
When you work with one of [Chroma's styles](https://github.com/alecthomas/chroma/tree/master/styles), know that the `chroma.Background` token type provides the default style for tokens. It does so by defining a foreground color and background color.
For example, this gives each token name not defined in the style a default color of `#f8f8f8` and uses `#000000` for the highlighted code block's background:
~~~go
chroma.Background: "#f8f8f2 bg:#000000",
~~~
Also, token types in a style file are hierarchical. For instance, when `CommentSpecial` is not defined, Chroma uses the token style from `Comment`. So when several comment tokens use the same color, you'll only need to define `Comment` and override the one that has a different color.
For a quick overview of the available styles and how they look, check out the [Chroma Style Gallery](https://xyproto.github.io/splash/docs/).
<a id="markdown-command-line-interface" name="command-line-interface"></a>
## Command-line interface
A command-line interface to Chroma is included. It can be installed with:
```sh
go get -u github.com/alecthomas/chroma/cmd/chroma
```
<a id="markdown-whats-missing-compared-to-pygments" name="whats-missing-compared-to-pygments"></a>
## What's missing compared to Pygments?
- Quite a few lexers, for various reasons (pull-requests welcome):
- Pygments lexers for complex languages often include custom code to
handle certain aspects, such as Perl6's ability to nest code inside
regular expressions. These require time and effort to convert.
- I mostly only converted languages I had heard of, to reduce the porting cost.
- Some more esoteric features of Pygments are omitted for simplicity.
- Though the Chroma API supports content detection, very few languages support them.
I have plans to implement a statistical analyser at some point, but not enough time.

@ -1,35 +0,0 @@
package chroma
// Coalesce is a Lexer interceptor that collapses runs of common types into a single token.
func Coalesce(lexer Lexer) Lexer { return &coalescer{lexer} }
type coalescer struct{ Lexer }
func (d *coalescer) Tokenise(options *TokeniseOptions, text string) (Iterator, error) {
var prev Token
it, err := d.Lexer.Tokenise(options, text)
if err != nil {
return nil, err
}
return func() Token {
for token := it(); token != (EOF); token = it() {
if len(token.Value) == 0 {
continue
}
if prev == EOF {
prev = token
} else {
if prev.Type == token.Type && len(prev.Value) < 8192 {
prev.Value += token.Value
} else {
out := prev
prev = token
return out
}
}
}
out := prev
prev = EOF
return out
}, nil
}

@ -1,164 +0,0 @@
package chroma
import (
"fmt"
"math"
"strconv"
"strings"
)
// ANSI2RGB maps ANSI colour names, as supported by Chroma, to hex RGB values.
var ANSI2RGB = map[string]string{
"#ansiblack": "000000",
"#ansidarkred": "7f0000",
"#ansidarkgreen": "007f00",
"#ansibrown": "7f7fe0",
"#ansidarkblue": "00007f",
"#ansipurple": "7f007f",
"#ansiteal": "007f7f",
"#ansilightgray": "e5e5e5",
// Normal
"#ansidarkgray": "555555",
"#ansired": "ff0000",
"#ansigreen": "00ff00",
"#ansiyellow": "ffff00",
"#ansiblue": "0000ff",
"#ansifuchsia": "ff00ff",
"#ansiturquoise": "00ffff",
"#ansiwhite": "ffffff",
// Aliases without the "ansi" prefix, because...why?
"#black": "000000",
"#darkred": "7f0000",
"#darkgreen": "007f00",
"#brown": "7f7fe0",
"#darkblue": "00007f",
"#purple": "7f007f",
"#teal": "007f7f",
"#lightgray": "e5e5e5",
// Normal
"#darkgray": "555555",
"#red": "ff0000",
"#green": "00ff00",
"#yellow": "ffff00",
"#blue": "0000ff",
"#fuchsia": "ff00ff",
"#turquoise": "00ffff",
"#white": "ffffff",
}
// Colour represents an RGB colour.
type Colour int32
// NewColour creates a Colour directly from RGB values.
func NewColour(r, g, b uint8) Colour {
return ParseColour(fmt.Sprintf("%02x%02x%02x", r, g, b))
}
// Distance between this colour and another.
//
// This uses the approach described here (https://www.compuphase.com/cmetric.htm).
// This is not as accurate as LAB, et. al. but is *vastly* simpler and sufficient for our needs.
func (c Colour) Distance(e2 Colour) float64 {
ar, ag, ab := int64(c.Red()), int64(c.Green()), int64(c.Blue())
br, bg, bb := int64(e2.Red()), int64(e2.Green()), int64(e2.Blue())
rmean := (ar + br) / 2
r := ar - br
g := ag - bg
b := ab - bb
return math.Sqrt(float64((((512 + rmean) * r * r) >> 8) + 4*g*g + (((767 - rmean) * b * b) >> 8)))
}
// Brighten returns a copy of this colour with its brightness adjusted.
//
// If factor is negative, the colour is darkened.
//
// Uses approach described here (http://www.pvladov.com/2012/09/make-color-lighter-or-darker.html).
func (c Colour) Brighten(factor float64) Colour {
r := float64(c.Red())
g := float64(c.Green())
b := float64(c.Blue())
if factor < 0 {
factor++
r *= factor
g *= factor
b *= factor
} else {
r = (255-r)*factor + r
g = (255-g)*factor + g
b = (255-b)*factor + b
}
return NewColour(uint8(r), uint8(g), uint8(b))
}
// BrightenOrDarken brightens a colour if it is < 0.5 brighteness or darkens if > 0.5 brightness.
func (c Colour) BrightenOrDarken(factor float64) Colour {
if c.Brightness() < 0.5 {
return c.Brighten(factor)
}
return c.Brighten(-factor)
}
// Brightness of the colour (roughly) in the range 0.0 to 1.0
func (c Colour) Brightness() float64 {
return (float64(c.Red()) + float64(c.Green()) + float64(c.Blue())) / 255.0 / 3.0
}
// ParseColour in the forms #rgb, #rrggbb, #ansi<colour>, or #<colour>.
// Will return an "unset" colour if invalid.
func ParseColour(colour string) Colour {
colour = normaliseColour(colour)
n, err := strconv.ParseUint(colour, 16, 32)
if err != nil {
return 0
}
return Colour(n + 1)
}
// MustParseColour is like ParseColour except it panics if the colour is invalid.
//
// Will panic if colour is in an invalid format.
func MustParseColour(colour string) Colour {
parsed := ParseColour(colour)
if !parsed.IsSet() {
panic(fmt.Errorf("invalid colour %q", colour))
}
return parsed
}
// IsSet returns true if the colour is set.
func (c Colour) IsSet() bool { return c != 0 }
func (c Colour) String() string { return fmt.Sprintf("#%06x", int(c-1)) }
func (c Colour) GoString() string { return fmt.Sprintf("Colour(0x%06x)", int(c-1)) }
// Red component of colour.
func (c Colour) Red() uint8 { return uint8(((c - 1) >> 16) & 0xff) }
// Green component of colour.
func (c Colour) Green() uint8 { return uint8(((c - 1) >> 8) & 0xff) }
// Blue component of colour.
func (c Colour) Blue() uint8 { return uint8((c - 1) & 0xff) }
// Colours is an orderable set of colours.
type Colours []Colour
func (c Colours) Len() int { return len(c) }
func (c Colours) Swap(i, j int) { c[i], c[j] = c[j], c[i] }
func (c Colours) Less(i, j int) bool { return c[i] < c[j] }
// Convert colours to #rrggbb.
func normaliseColour(colour string) string {
if ansi, ok := ANSI2RGB[colour]; ok {
return ansi
}
if strings.HasPrefix(colour, "#") {
colour = colour[1:]
if len(colour) == 3 {
return colour[0:1] + colour[0:1] + colour[1:2] + colour[1:2] + colour[2:3] + colour[2:3]
}
}
return colour
}

@ -1,137 +0,0 @@
package chroma
import (
"bytes"
)
type delegatingLexer struct {
root Lexer
language Lexer
}
// DelegatingLexer combines two lexers to handle the common case of a language embedded inside another, such as PHP
// inside HTML or PHP inside plain text.
//
// It takes two lexer as arguments: a root lexer and a language lexer. First everything is scanned using the language
// lexer, which must return "Other" for unrecognised tokens. Then all "Other" tokens are lexed using the root lexer.
// Finally, these two sets of tokens are merged.
//
// The lexers from the template lexer package use this base lexer.
func DelegatingLexer(root Lexer, language Lexer) Lexer {
return &delegatingLexer{
root: root,
language: language,
}
}
func (d *delegatingLexer) Config() *Config {
return d.language.Config()
}
// An insertion is the character range where language tokens should be inserted.
type insertion struct {
start, end int
tokens []Token
}
func (d *delegatingLexer) Tokenise(options *TokeniseOptions, text string) (Iterator, error) { // nolint: gocognit
tokens, err := Tokenise(Coalesce(d.language), options, text)
if err != nil {
return nil, err
}
// Compute insertions and gather "Other" tokens.
others := &bytes.Buffer{}
insertions := []*insertion{}
var insert *insertion
offset := 0
var last Token
for _, t := range tokens {
if t.Type == Other {
if last != EOF && insert != nil && last.Type != Other {
insert.end = offset
}
others.WriteString(t.Value)
} else {
if last == EOF || last.Type == Other {
insert = &insertion{start: offset}
insertions = append(insertions, insert)
}
insert.tokens = append(insert.tokens, t)
}
last = t
offset += len(t.Value)
}
if len(insertions) == 0 {
return d.root.Tokenise(options, text)
}
// Lex the other tokens.
rootTokens, err := Tokenise(Coalesce(d.root), options, others.String())
if err != nil {
return nil, err
}
// Interleave the two sets of tokens.
var out []Token
offset = 0 // Offset into text.
tokenIndex := 0
nextToken := func() Token {
if tokenIndex >= len(rootTokens) {
return EOF
}
t := rootTokens[tokenIndex]
tokenIndex++
return t
}
insertionIndex := 0
nextInsertion := func() *insertion {
if insertionIndex >= len(insertions) {
return nil
}
i := insertions[insertionIndex]
insertionIndex++
return i
}
t := nextToken()
i := nextInsertion()
for t != EOF || i != nil {
// fmt.Printf("%d->%d:%q %d->%d:%q\n", offset, offset+len(t.Value), t.Value, i.start, i.end, Stringify(i.tokens...))
if t == EOF || (i != nil && i.start < offset+len(t.Value)) {
var l Token
l, t = splitToken(t, i.start-offset)
if l != EOF {
out = append(out, l)
offset += len(l.Value)
}
out = append(out, i.tokens...)
offset += i.end - i.start
if t == EOF {
t = nextToken()
}
i = nextInsertion()
} else {
out = append(out, t)
offset += len(t.Value)
t = nextToken()
}
}
return Literator(out...), nil
}
func splitToken(t Token, offset int) (l Token, r Token) {
if t == EOF {
return EOF, EOF
}
if offset == 0 {
return EOF, t
}
if offset == len(t.Value) {
return t, EOF
}
l = t.Clone()
r = t.Clone()
l.Value = l.Value[:offset]
r.Value = r.Value[offset:]
return
}

@ -1,7 +0,0 @@
// Package chroma takes source code and other structured text and converts it into syntax highlighted HTML, ANSI-
// coloured text, etc.
//
// Chroma is based heavily on Pygments, and includes translators for Pygments lexers and styles.
//
// For more information, go here: https://github.com/alecthomas/chroma
package chroma

@ -1,43 +0,0 @@
package chroma
import (
"io"
)
// A Formatter for Chroma lexers.
type Formatter interface {
// Format returns a formatting function for tokens.
//
// If the iterator panics, the Formatter should recover.
Format(w io.Writer, style *Style, iterator Iterator) error
}
// A FormatterFunc is a Formatter implemented as a function.
//
// Guards against iterator panics.
type FormatterFunc func(w io.Writer, style *Style, iterator Iterator) error
func (f FormatterFunc) Format(w io.Writer, s *Style, it Iterator) (err error) { // nolint
defer func() {
if perr := recover(); perr != nil {
err = perr.(error)
}
}()
return f(w, s, it)
}
type recoveringFormatter struct {
Formatter
}
func (r recoveringFormatter) Format(w io.Writer, s *Style, it Iterator) (err error) {
defer func() {
if perr := recover(); perr != nil {
err = perr.(error)
}
}()
return r.Formatter.Format(w, s, it)
}
// RecoveringFormatter wraps a formatter with panic recovery.
func RecoveringFormatter(formatter Formatter) Formatter { return recoveringFormatter{formatter} }

@ -1,57 +0,0 @@
package formatters
import (
"io"
"sort"
"github.com/alecthomas/chroma"
"github.com/alecthomas/chroma/formatters/html"
"github.com/alecthomas/chroma/formatters/svg"
)
var (
// NoOp formatter.
NoOp = Register("noop", chroma.FormatterFunc(func(w io.Writer, s *chroma.Style, iterator chroma.Iterator) error {
for t := iterator(); t != chroma.EOF; t = iterator() {
if _, err := io.WriteString(w, t.Value); err != nil {
return err
}
}
return nil
}))
// Default HTML formatter outputs self-contained HTML.
htmlFull = Register("html", html.New(html.Standalone(true), html.WithClasses(true))) // nolint
SVG = Register("svg", svg.New(svg.EmbedFont("Liberation Mono", svg.FontLiberationMono, svg.WOFF)))
)
// Fallback formatter.
var Fallback = NoOp
// Registry of Formatters.
var Registry = map[string]chroma.Formatter{}
// Names of registered formatters.
func Names() []string {
out := []string{}
for name := range Registry {
out = append(out, name)
}
sort.Strings(out)
return out
}
// Get formatter by name.
//
// If the given formatter is not found, the Fallback formatter will be returned.
func Get(name string) chroma.Formatter {
if f, ok := Registry[name]; ok {
return f
}
return Fallback
}
// Register a named formatter.
func Register(name string, formatter chroma.Formatter) chroma.Formatter {
Registry[name] = formatter
return formatter
}

@ -1,435 +0,0 @@
package html
import (
"fmt"
"html"
"io"
"sort"
"strings"
"github.com/alecthomas/chroma"
)
// Option sets an option of the HTML formatter.
type Option func(f *Formatter)
// Standalone configures the HTML formatter for generating a standalone HTML document.
func Standalone(b bool) Option { return func(f *Formatter) { f.standalone = b } }
// ClassPrefix sets the CSS class prefix.
func ClassPrefix(prefix string) Option { return func(f *Formatter) { f.prefix = prefix } }
// WithClasses emits HTML using CSS classes, rather than inline styles.
func WithClasses(b bool) Option { return func(f *Formatter) { f.Classes = b } }
// TabWidth sets the number of characters for a tab. Defaults to 8.
func TabWidth(width int) Option { return func(f *Formatter) { f.tabWidth = width } }
// PreventSurroundingPre prevents the surrounding pre tags around the generated code.
func PreventSurroundingPre(b bool) Option {
return func(f *Formatter) {
if b {
f.preWrapper = nopPreWrapper
} else {
f.preWrapper = defaultPreWrapper
}
}
}
// WithPreWrapper allows control of the surrounding pre tags.
func WithPreWrapper(wrapper PreWrapper) Option {
return func(f *Formatter) {
f.preWrapper = wrapper
}
}
// WithLineNumbers formats output with line numbers.
func WithLineNumbers(b bool) Option {
return func(f *Formatter) {
f.lineNumbers = b
}
}
// LineNumbersInTable will, when combined with WithLineNumbers, separate the line numbers
// and code in table td's, which make them copy-and-paste friendly.
func LineNumbersInTable(b bool) Option {
return func(f *Formatter) {
f.lineNumbersInTable = b
}
}
// LinkableLineNumbers decorates the line numbers HTML elements with an "id"
// attribute so they can be linked.
func LinkableLineNumbers(b bool, prefix string) Option {
return func(f *Formatter) {
f.linkableLineNumbers = b
f.lineNumbersIDPrefix = prefix
}
}
// HighlightLines higlights the given line ranges with the Highlight style.
//
// A range is the beginning and ending of a range as 1-based line numbers, inclusive.
func HighlightLines(ranges [][2]int) Option {
return func(f *Formatter) {
f.highlightRanges = ranges
sort.Sort(f.highlightRanges)
}
}
// BaseLineNumber sets the initial number to start line numbering at. Defaults to 1.
func BaseLineNumber(n int) Option {
return func(f *Formatter) {
f.baseLineNumber = n
}
}
// New HTML formatter.
func New(options ...Option) *Formatter {
f := &Formatter{
baseLineNumber: 1,
preWrapper: defaultPreWrapper,
}
for _, option := range options {
option(f)
}
return f
}
// PreWrapper defines the operations supported in WithPreWrapper.
type PreWrapper interface {
// Start is called to write a start <pre> element.
// The code flag tells whether this block surrounds
// highlighted code. This will be false when surrounding
// line numbers.
Start(code bool, styleAttr string) string
// End is called to write the end </pre> element.
End(code bool) string
}
type preWrapper struct {
start func(code bool, styleAttr string) string
end func(code bool) string
}
func (p preWrapper) Start(code bool, styleAttr string) string {
return p.start(code, styleAttr)
}
func (p preWrapper) End(code bool) string {
return p.end(code)
}
var (
nopPreWrapper = preWrapper{
start: func(code bool, styleAttr string) string { return "" },
end: func(code bool) string { return "" },
}
defaultPreWrapper = preWrapper{
start: func(code bool, styleAttr string) string {
return fmt.Sprintf("<pre%s>", styleAttr)
},
end: func(code bool) string {
return "</pre>"
},
}
)
// Formatter that generates HTML.
type Formatter struct {
standalone bool
prefix string
Classes bool // Exported field to detect when classes are being used
preWrapper PreWrapper
tabWidth int
lineNumbers bool
lineNumbersInTable bool
linkableLineNumbers bool
lineNumbersIDPrefix string
highlightRanges highlightRanges
baseLineNumber int
}
type highlightRanges [][2]int
func (h highlightRanges) Len() int { return len(h) }
func (h highlightRanges) Swap(i, j int) { h[i], h[j] = h[j], h[i] }
func (h highlightRanges) Less(i, j int) bool { return h[i][0] < h[j][0] }
func (f *Formatter) Format(w io.Writer, style *chroma.Style, iterator chroma.Iterator) (err error) {
return f.writeHTML(w, style, iterator.Tokens())
}
// We deliberately don't use html/template here because it is two orders of magnitude slower (benchmarked).
//
// OTOH we need to be super careful about correct escaping...
func (f *Formatter) writeHTML(w io.Writer, style *chroma.Style, tokens []chroma.Token) (err error) { // nolint: gocyclo
css := f.styleToCSS(style)
if !f.Classes {
for t, style := range css {
css[t] = compressStyle(style)
}
}
if f.standalone {
fmt.Fprint(w, "<html>\n")
if f.Classes {
fmt.Fprint(w, "<style type=\"text/css\">\n")
err = f.WriteCSS(w, style)
if err != nil {
return err
}
fmt.Fprintf(w, "body { %s; }\n", css[chroma.Background])
fmt.Fprint(w, "</style>")
}
fmt.Fprintf(w, "<body%s>\n", f.styleAttr(css, chroma.Background))
}
wrapInTable := f.lineNumbers && f.lineNumbersInTable
lines := chroma.SplitTokensIntoLines(tokens)
lineDigits := len(fmt.Sprintf("%d", f.baseLineNumber+len(lines)-1))
highlightIndex := 0
if wrapInTable {
// List line numbers in its own <td>
fmt.Fprintf(w, "<div%s>\n", f.styleAttr(css, chroma.Background))
fmt.Fprintf(w, "<table%s><tr>", f.styleAttr(css, chroma.LineTable))
fmt.Fprintf(w, "<td%s>\n", f.styleAttr(css, chroma.LineTableTD))
fmt.Fprintf(w, f.preWrapper.Start(false, f.styleAttr(css, chroma.Background)))
for index := range lines {
line := f.baseLineNumber + index
highlight, next := f.shouldHighlight(highlightIndex, line)
if next {
highlightIndex++
}
if highlight {
fmt.Fprintf(w, "<span%s>", f.styleAttr(css, chroma.LineHighlight))
}
fmt.Fprintf(w, "<span%s%s>%*d\n</span>", f.styleAttr(css, chroma.LineNumbersTable), f.lineIDAttribute(line), lineDigits, line)
if highlight {
fmt.Fprintf(w, "</span>")
}
}
fmt.Fprint(w, f.preWrapper.End(false))
fmt.Fprint(w, "</td>\n")
fmt.Fprintf(w, "<td%s>\n", f.styleAttr(css, chroma.LineTableTD, "width:100%"))
}
fmt.Fprintf(w, f.preWrapper.Start(true, f.styleAttr(css, chroma.Background)))
highlightIndex = 0
for index, tokens := range lines {
// 1-based line number.
line := f.baseLineNumber + index
highlight, next := f.shouldHighlight(highlightIndex, line)
if next {
highlightIndex++
}
if highlight {
fmt.Fprintf(w, "<span%s>", f.styleAttr(css, chroma.LineHighlight))
}
if f.lineNumbers && !wrapInTable {
fmt.Fprintf(w, "<span%s%s>%*d</span>", f.styleAttr(css, chroma.LineNumbers), f.lineIDAttribute(line), lineDigits, line)
}
for _, token := range tokens {
html := html.EscapeString(token.String())
attr := f.styleAttr(css, token.Type)
if attr != "" {
html = fmt.Sprintf("<span%s>%s</span>", attr, html)
}
fmt.Fprint(w, html)
}
if highlight {
fmt.Fprintf(w, "</span>")
}
}
fmt.Fprintf(w, f.preWrapper.End(true))
if wrapInTable {
fmt.Fprint(w, "</td></tr></table>\n")
fmt.Fprint(w, "</div>\n")
}
if f.standalone {
fmt.Fprint(w, "\n</body>\n")
fmt.Fprint(w, "</html>\n")
}
return nil
}
func (f *Formatter) lineIDAttribute(line int) string {
if !f.linkableLineNumbers {
return ""
}
return fmt.Sprintf(" id=\"%s%d\"", f.lineNumbersIDPrefix, line)
}
func (f *Formatter) shouldHighlight(highlightIndex, line int) (bool, bool) {
next := false
for highlightIndex < len(f.highlightRanges) && line > f.highlightRanges[highlightIndex][1] {
highlightIndex++
next = true
}
if highlightIndex < len(f.highlightRanges) {
hrange := f.highlightRanges[highlightIndex]
if line >= hrange[0] && line <= hrange[1] {
return true, next
}
}
return false, next
}
func (f *Formatter) class(t chroma.TokenType) string {
for t != 0 {
if cls, ok := chroma.StandardTypes[t]; ok {
if cls != "" {
return f.prefix + cls
}
return ""
}
t = t.Parent()
}
if cls := chroma.StandardTypes[t]; cls != "" {
return f.prefix + cls
}
return ""
}
func (f *Formatter) styleAttr(styles map[chroma.TokenType]string, tt chroma.TokenType, extraCSS ...string) string {
if f.Classes {
cls := f.class(tt)
if cls == "" {
return ""
}
return fmt.Sprintf(` class="%s"`, cls)
}
if _, ok := styles[tt]; !ok {
tt = tt.SubCategory()
if _, ok := styles[tt]; !ok {
tt = tt.Category()
if _, ok := styles[tt]; !ok {
return ""
}
}
}
css := []string{styles[tt]}
css = append(css, extraCSS...)
return fmt.Sprintf(` style="%s"`, strings.Join(css, ";"))
}
func (f *Formatter) tabWidthStyle() string {
if f.tabWidth != 0 && f.tabWidth != 8 {
return fmt.Sprintf("; -moz-tab-size: %[1]d; -o-tab-size: %[1]d; tab-size: %[1]d", f.tabWidth)
}
return ""
}
// WriteCSS writes CSS style definitions (without any surrounding HTML).
func (f *Formatter) WriteCSS(w io.Writer, style *chroma.Style) error {
css := f.styleToCSS(style)
// Special-case background as it is mapped to the outer ".chroma" class.
if _, err := fmt.Fprintf(w, "/* %s */ .%schroma { %s }\n", chroma.Background, f.prefix, css[chroma.Background]); err != nil {
return err
}
// Special-case code column of table to expand width.
if f.lineNumbers && f.lineNumbersInTable {
if _, err := fmt.Fprintf(w, "/* %s */ .%schroma .%s:last-child { width: 100%%; }",
chroma.LineTableTD, f.prefix, f.class(chroma.LineTableTD)); err != nil {
return err
}
}
// Special-case line number highlighting when targeted.
if f.lineNumbers || f.lineNumbersInTable {
targetedLineCSS := StyleEntryToCSS(style.Get(chroma.LineHighlight))
for _, tt := range []chroma.TokenType{chroma.LineNumbers, chroma.LineNumbersTable} {
fmt.Fprintf(w, "/* %s targeted by URL anchor */ .%schroma .%s:target { %s }\n", tt, f.prefix, f.class(tt), targetedLineCSS)
}
}
tts := []int{}
for tt := range css {
tts = append(tts, int(tt))
}
sort.Ints(tts)
for _, ti := range tts {
tt := chroma.TokenType(ti)
if tt == chroma.Background {
continue
}
styles := css[tt]
if _, err := fmt.Fprintf(w, "/* %s */ .%schroma .%s { %s }\n", tt, f.prefix, f.class(tt), styles); err != nil {
return err
}
}
return nil
}
func (f *Formatter) styleToCSS(style *chroma.Style) map[chroma.TokenType]string {
classes := map[chroma.TokenType]string{}
bg := style.Get(chroma.Background)
// Convert the style.
for t := range chroma.StandardTypes {
entry := style.Get(t)
if t != chroma.Background {
entry = entry.Sub(bg)
}
if entry.IsZero() {
continue
}
classes[t] = StyleEntryToCSS(entry)
}
classes[chroma.Background] += f.tabWidthStyle()
lineNumbersStyle := "margin-right: 0.4em; padding: 0 0.4em 0 0.4em;"
// All rules begin with default rules followed by user provided rules
classes[chroma.LineNumbers] = lineNumbersStyle + classes[chroma.LineNumbers]
classes[chroma.LineNumbersTable] = lineNumbersStyle + classes[chroma.LineNumbersTable]
classes[chroma.LineHighlight] = "display: block; width: 100%;" + classes[chroma.LineHighlight]
classes[chroma.LineTable] = "border-spacing: 0; padding: 0; margin: 0; border: 0; width: auto; overflow: auto; display: block;" + classes[chroma.LineTable]
classes[chroma.LineTableTD] = "vertical-align: top; padding: 0; margin: 0; border: 0;" + classes[chroma.LineTableTD]
return classes
}
// StyleEntryToCSS converts a chroma.StyleEntry to CSS attributes.
func StyleEntryToCSS(e chroma.StyleEntry) string {
styles := []string{}
if e.Colour.IsSet() {
styles = append(styles, "color: "+e.Colour.String())
}
if e.Background.IsSet() {
styles = append(styles, "background-color: "+e.Background.String())
}
if e.Bold == chroma.Yes {
styles = append(styles, "font-weight: bold")
}
if e.Italic == chroma.Yes {
styles = append(styles, "font-style: italic")
}
if e.Underline == chroma.Yes {
styles = append(styles, "text-decoration: underline")