From 244ca1c3e036f79e35b702aeb508ca1168e4e9ae Mon Sep 17 00:00:00 2001 From: Sam Coe Date: Wed, 10 Aug 2022 15:10:00 +0200 Subject: [PATCH] Add markdown renderer from gh --- go.mod | 17 ++++++++-- go.sum | 42 +++++++++++++++++++++-- pkg/markdown/markdown.go | 64 +++++++++++++++++++++++++++++++++++ pkg/markdown/markdown_test.go | 38 +++++++++++++++++++++ pkg/term/env.go | 12 +++++++ 5 files changed, 169 insertions(+), 4 deletions(-) create mode 100644 pkg/markdown/markdown.go create mode 100644 pkg/markdown/markdown_test.go diff --git a/go.mod b/go.mod index 8dec38c..eb9b6dd 100644 --- a/go.mod +++ b/go.mod @@ -4,26 +4,39 @@ go 1.18 require ( github.com/MakeNowJust/heredoc v1.0.0 + github.com/charmbracelet/glamour v0.5.0 github.com/cli/browser v1.1.0 github.com/cli/safeexec v1.0.0 github.com/cli/shurcooL-graphql v0.0.1 github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 github.com/henvic/httpretty v0.0.6 github.com/mattn/go-runewidth v0.0.13 + github.com/microcosm-cc/bluemonday v1.0.19 // indirect + github.com/muesli/termenv v0.12.0 github.com/stretchr/testify v1.7.0 github.com/thlib/go-timezone-local v0.0.0-20210907160436-ef149e42d28e - golang.org/x/sys v0.0.0-20210831042530-f4d43177bf5e + golang.org/x/sys v0.0.0-20220209214540-3681064d5158 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1 gopkg.in/h2non/gock.v1 v1.1.2 gopkg.in/yaml.v3 v3.0.1 ) require ( - github.com/davecgh/go-spew v1.1.0 // indirect + github.com/alecthomas/chroma v0.10.0 // indirect + github.com/aymerick/douceur v0.2.0 // indirect + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/dlclark/regexp2 v1.4.0 // indirect + github.com/gorilla/css v1.0.0 // indirect github.com/h2non/parth v0.0.0-20190131123155-b4df798d6542 // indirect github.com/kr/pretty v0.1.0 // indirect + github.com/lucasb-eyer/go-colorful v1.2.0 // indirect + github.com/mattn/go-isatty v0.0.14 // indirect + github.com/muesli/reflow v0.3.0 // indirect + github.com/olekukonko/tablewriter v0.0.5 // indirect github.com/pmezard/go-difflib v1.0.0 // indirect github.com/rivo/uniseg v0.2.0 // indirect + github.com/yuin/goldmark v1.4.4 // indirect + github.com/yuin/goldmark-emoji v1.0.1 // indirect golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2 // indirect gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect ) diff --git a/go.sum b/go.sum index c1241b5..437b08a 100644 --- a/go.sum +++ b/go.sum @@ -1,15 +1,26 @@ github.com/MakeNowJust/heredoc v1.0.0 h1:cXCdzVdstXyiTqTvfqk9SDHpKNjxuom+DOlyEeQ4pzQ= github.com/MakeNowJust/heredoc v1.0.0/go.mod h1:mG5amYoWBHf8vpLOuehzbGGw0EHxpZZ6lCpQ4fNJ8LE= +github.com/alecthomas/chroma v0.10.0 h1:7XDcGkCQopCNKjZHfYrNLraA+M7e0fMiJ/Mfikbfjek= +github.com/alecthomas/chroma v0.10.0/go.mod h1:jtJATyUxlIORhUOFNA9NZDWGAQ8wpxQQqNSB4rjA/1s= +github.com/aymerick/douceur v0.2.0 h1:Mv+mAeH1Q+n9Fr+oyamOlAkUNPWPlA8PPGR0QAaYuPk= +github.com/aymerick/douceur v0.2.0/go.mod h1:wlT5vV2O3h55X9m7iVYN0TBM0NH/MmbLnd30/FjWUq4= +github.com/charmbracelet/glamour v0.5.0 h1:wu15ykPdB7X6chxugG/NNfDUbyyrCLV9XBalj5wdu3g= +github.com/charmbracelet/glamour v0.5.0/go.mod h1:9ZRtG19AUIzcTm7FGLGbq3D5WKQ5UyZBbQsMQN0XIqc= github.com/cli/browser v1.1.0 h1:xOZBfkfY9L9vMBgqb1YwRirGu6QFaQ5dP/vXt5ENSOY= github.com/cli/browser v1.1.0/go.mod h1:HKMQAt9t12kov91Mn7RfZxyJQQgWgyS/3SZswlZ5iTI= github.com/cli/safeexec v1.0.0 h1:0VngyaIyqACHdcMNWfo6+KdUYnqEr2Sg+bSP1pdF+dI= github.com/cli/safeexec v1.0.0/go.mod h1:Z/D4tTN8Vs5gXYHDCbaM1S/anmEDnJb1iW0+EJ5zx3Q= github.com/cli/shurcooL-graphql v0.0.1 h1:/9J3t9O6p1B8zdBBtQighq5g7DQRItBwuwGh3SocsKM= github.com/cli/shurcooL-graphql v0.0.1/go.mod h1:U7gCSuMZP/Qy7kbqkk5PrqXEeDgtfG5K+W+u8weorps= -github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8= github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/dlclark/regexp2 v1.4.0 h1:F1rxgk7p4uKjwIQxBs9oAXe5CqrXlCduYEJvrF4u93E= +github.com/dlclark/regexp2 v1.4.0/go.mod h1:2pZnwuY/m+8K6iRw6wQdMtk+rH5tNGR1i55kozfMjCc= github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 h1:El6M4kTTCOh6aBiKaUGG7oYTSPP8MxqL4YI3kZKwcP4= github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510/go.mod h1:pupxD2MaaD3pAXIBCelhxNneeOaAeabZDe5s4K6zSpQ= +github.com/gorilla/css v1.0.0 h1:BQqNyPTi50JCFMTw/b67hByjMVXZRwGha6wxVGkeihY= +github.com/gorilla/css v1.0.0/go.mod h1:Dn721qIggHpt4+EFCcTLTU/vk5ySda2ReITrtgBl60c= github.com/h2non/parth v0.0.0-20190131123155-b4df798d6542 h1:2VTzZjLZBgl62/EtslCrtky5vbi9dd7HrQPQIx6wqiw= github.com/h2non/parth v0.0.0-20190131123155-b4df798d6542/go.mod h1:Ow0tF8D4Kplbc8s8sSb3V2oUCygFHVp8gC3Dn6U4MNI= github.com/henvic/httpretty v0.0.6 h1:JdzGzKZBajBfnvlMALXXMVQWxWMF/ofTy8C3/OSUTxs= @@ -19,12 +30,30 @@ github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORN github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ= github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE= github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI= +github.com/lucasb-eyer/go-colorful v1.2.0 h1:1nnpGOrhyZZuNyfu1QjKiUICQ74+3FNCN69Aj6K7nkY= +github.com/lucasb-eyer/go-colorful v1.2.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0= +github.com/mattn/go-isatty v0.0.13/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU= +github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9Y= +github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94= +github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI= +github.com/mattn/go-runewidth v0.0.12/go.mod h1:RAqKPSqVFrSLVXbA8x7dzmKdmGzieGRCM46jaSJTDAk= github.com/mattn/go-runewidth v0.0.13 h1:lTGmDsbAYt5DmK6OnoV7EuIF1wEIFAcxld6ypU4OSgU= github.com/mattn/go-runewidth v0.0.13/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w= +github.com/microcosm-cc/bluemonday v1.0.17/go.mod h1:Z0r70sCuXHig8YpBzCc5eGHAap2K7e/u082ZUpDRRqM= +github.com/microcosm-cc/bluemonday v1.0.19 h1:OI7hoF5FY4pFz2VA//RN8TfM0YJ2dJcl4P4APrCWy6c= +github.com/microcosm-cc/bluemonday v1.0.19/go.mod h1:QNzV2UbLK2/53oIIwTOyLUSABMkjZ4tqiyC1g/DyqxE= +github.com/muesli/reflow v0.3.0 h1:IFsN6K9NfGtjeggFP+68I4chLZV2yIKsXJFNZ+eWh6s= +github.com/muesli/reflow v0.3.0/go.mod h1:pbwTDkVPibjO2kyvBQRBxTWEEGDGq0FlB1BIKtnHY/8= +github.com/muesli/termenv v0.9.0/go.mod h1:R/LzAKf+suGs4IsO95y7+7DpFHO0KABgnZqtlyx2mBw= +github.com/muesli/termenv v0.12.0 h1:KuQRUE3PgxRFWhq4gHvZtPSLCGDqM5q/cYr1pZ39ytc= +github.com/muesli/termenv v0.12.0/go.mod h1:WCCv32tusQ/EEZ5S8oUIIrC/nIuBcxCVqlN4Xfkv+7A= github.com/nbio/st v0.0.0-20140626010706-e9e8d9816f32 h1:W6apQkHrMkS0Muv8G/TipAy/FJl/rCYT0+EuS8+Z0z4= github.com/nbio/st v0.0.0-20140626010706-e9e8d9816f32/go.mod h1:9wM+0iRr9ahx58uYLpLIr5fm8diHn0JbqRycJi6w0Ms= +github.com/olekukonko/tablewriter v0.0.5 h1:P2Ga83D34wi1o9J6Wh1mRuqd4mF/x/lgBS7N7AbDhec= +github.com/olekukonko/tablewriter v0.0.5/go.mod h1:hPp6KlRPjbx+hW8ykQs1w3UBbZlj6HuIJcUGPhkA7kY= github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM= github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= +github.com/rivo/uniseg v0.1.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc= github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY= github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc= github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= @@ -32,13 +61,22 @@ github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5Cc github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg= github.com/thlib/go-timezone-local v0.0.0-20210907160436-ef149e42d28e h1:BuzhfgfWQbX0dWzYzT1zsORLnHRv3bcRcsaUk0VmXA8= github.com/thlib/go-timezone-local v0.0.0-20210907160436-ef149e42d28e/go.mod h1:/Tnicc6m/lsJE0irFMA0LfIwTBo4QP7A8IfyIv4zZKI= +github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74= +github.com/yuin/goldmark v1.4.4 h1:zNWRjYUW32G9KirMXYHQHVNFkXvMI7LpgNW2AgYAoIs= +github.com/yuin/goldmark v1.4.4/go.mod h1:rmuwmfZ0+bvzB24eSC//bk1R1Zp3hM0OXYv/G2LIilg= +github.com/yuin/goldmark-emoji v1.0.1 h1:ctuWEyzGBwiucEqxzwe0SOYDXPAucOrE9NQC18Wa1os= +github.com/yuin/goldmark-emoji v1.0.1/go.mod h1:2w1E6FEWLcDQkoTE+7HU6QF1F6SLlNGjRIBbIZQFqkQ= +golang.org/x/net v0.0.0-20210614182718-04defd469f4e/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y= golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2 h1:CIJ76btIcR3eFI5EgSo6k1qKw9KJexJuRLI9G7Hp5wE= golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y= +golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20210319071255-635bc2c9138d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= -golang.org/x/sys v0.0.0-20210831042530-f4d43177bf5e h1:XMgFehsDnnLGtjvjOfqWSUzt0alpTR1RSEuznObga2c= +golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= golang.org/x/sys v0.0.0-20210831042530-f4d43177bf5e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= +golang.org/x/sys v0.0.0-20220209214540-3681064d5158 h1:rm+CHSpPEEW2IsXUib1ThaHIjuBVZjxNgSKmBLFfD4c= +golang.org/x/sys v0.0.0-20220209214540-3681064d5158/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1 h1:v+OssWQX+hTHEmOBgwxdZxK4zHq3yOs8F9J7mk0PY8E= golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo= golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= diff --git a/pkg/markdown/markdown.go b/pkg/markdown/markdown.go new file mode 100644 index 0000000..93a7604 --- /dev/null +++ b/pkg/markdown/markdown.go @@ -0,0 +1,64 @@ +// Package markdown facilitates rendering markdown in the terminal. +package markdown + +import ( + "os" + "strings" + + "github.com/charmbracelet/glamour" +) + +// WithoutIndentation is a rendering option that removes indentation from the markdown rendering. +func WithoutIndentation() glamour.TermRendererOption { + overrides := []byte(` + { + "document": { + "margin": 0 + }, + "code_block": { + "margin": 0 + } + }`) + + return glamour.WithStylesFromJSONBytes(overrides) +} + +// WithoutWrap is a rendering option that set the character limit for soft wraping the markdown rendering. +func WithWrap(w int) glamour.TermRendererOption { + return glamour.WithWordWrap(w) +} + +// WithTheme is a rendering option that sets the theme to use while rendering the markdown. +// It can be used in conjunction with [term.Theme]. +// If the enviornment variable GLAMOUR_STYLE is set, it will take precedence over the provided theme. +func WithTheme(theme string) glamour.TermRendererOption { + style := os.Getenv("GLAMOUR_STYLE") + if style == "" || style == "auto" { + switch theme { + case "light", "dark": + style = theme + default: + style = "notty" + } + } + return glamour.WithStylePath(style) +} + +// WithBaseURL is a rendering option that sets the base URL to use when rendering relative URLs. +func WithBaseURL(u string) glamour.TermRendererOption { + return glamour.WithBaseURL(u) +} + +// Render the markdown string according to the specified rendering options. +// By default emoji are rendered and new lines are preserved. +func Render(text string, opts ...glamour.TermRendererOption) (string, error) { + // Glamour rendering preserves carriage return characters in code blocks, but + // we need to ensure that no such characters are present in the output. + text = strings.ReplaceAll(text, "\r\n", "\n") + opts = append(opts, glamour.WithEmoji(), glamour.WithPreservedNewLines()) + tr, err := glamour.NewTermRenderer(opts...) + if err != nil { + return "", err + } + return tr.Render(text) +} diff --git a/pkg/markdown/markdown_test.go b/pkg/markdown/markdown_test.go new file mode 100644 index 0000000..f131b42 --- /dev/null +++ b/pkg/markdown/markdown_test.go @@ -0,0 +1,38 @@ +package markdown + +import ( + "testing" + + "github.com/stretchr/testify/assert" +) + +func Test_Render(t *testing.T) { + t.Setenv("GLAMOUR_STYLE", "") + tests := []struct { + name string + text string + theme string + }{ + { + name: "light style", + text: "some text", + theme: "light", + }, + { + name: "dark style", + text: "some text", + theme: "dark", + }, + { + name: "notty style", + text: "some text", + theme: "none", + }, + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + _, err := Render(tt.text, WithTheme(tt.theme)) + assert.NoError(t, err) + }) + } +} diff --git a/pkg/term/env.go b/pkg/term/env.go index 994c99e..19aa768 100644 --- a/pkg/term/env.go +++ b/pkg/term/env.go @@ -8,6 +8,7 @@ import ( "strconv" "strings" + "github.com/muesli/termenv" "golang.org/x/term" ) @@ -121,6 +122,17 @@ func (t Term) Size() (int, int, error) { return width, height, err } +// Theme returns the theme of the terminal by analyzing the background color of the terminal. +func (t Term) Theme() string { + if !t.IsColorEnabled() { + return "none" + } + if termenv.HasDarkBackground() { + return "dark" + } + return "light" +} + // IsTerminal reports whether a file descriptor is connected to a terminal. func IsTerminal(f *os.File) bool { return term.IsTerminal(int(f.Fd()))