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  1. 3
      .gitignore
  2. 15
      LICENSE
  3. 67
      README.md
  4. 39
      go.mod
  5. 99
      go.sum
  6. BIN
      logo.png
  7. 316
      sshww.go

3
.gitignore

@ -0,0 +1,3 @@
.ssh
sshww
warm-welcome

15
LICENSE

@ -0,0 +1,15 @@
ssh-warm-welcome: warm welcome pages over SSH
Copyright (C) 2022 decentral1se <d34ae261d3@sinenomine.email>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.

67
README.md

@ -0,0 +1,67 @@
# ssh-warm-welcome
<img align="right" width="150" src="./logo.png"/>
SSH as a publishing interface :tada:
`ssh-warm-welcome` serves a [TUI] for reading markdown documents via a built-in
SSH server. In the context of a [pubnix] or [femserver] it can be a convenient
way to publish documentation to a general public via the terminal instead of
the browser. It's designed to be easy to use for beginners: no user accounts or
SSH keys are required, simply use your standard `/usr/bin/ssh` command to
connect & start reading.
Here's a little demo video: [`vvvvvvaria.org/~decentral1se/sshww/demo.mp4`](https://vvvvvvaria.org/~decentral1se/sshww/demo.mp4)
[pubnix]: https://tilde.town/~cmccabe/online-communities.html
[femserver]: https://gendersec.tacticaltech.org/wiki/index.php/Servers:_From_autonomous_servers_to_feminist_servers
[TUI]: https://en.wikipedia.org/wiki/Text-based_user_interface
## Quickstart
Download `ssh-warm-welcome` like so.
(only `x86_64` is available right now but we can build more if you need it)
```bash
curl https://vvvvvvaria.org/~decentral1se/sshww/sshww -o sshww
chmod +x sshww
```
Write your warm welcome home page in markdown:
```
mkdir -p warm-welcome
echo "# hello, world!\n\nwelcome, welcome" > warm-welcome/welcome.md
```
Then turn on the built-in SSH server:
```
./sshww
2022/04/03 00:11:39 warm welcome waiting on port :1312
```
And from another terminal, connect with your SSH client:
```
ssh -p 1312 localhost
```
That's it!
## Configure
* `sshww` reads markdown files from a folder named `warm-welcome` in the
current working directory. Any file it finds there will be included as a menu
item in the warm welcome environment. `welcome.md` is the only required file,
everything else is optional. Up to 10 markdown files are supported.
## Acknowledgements
* [`egonelbre/gophers`](https://github.com/egonelbre/gophers) for the rad logo
* [`charm.sh`](https://github.com/charmbracelet) for new-wave command line glamour
## License
<a><img src="https://www.gnu.org/graphics/gplv3-or-later.png"/></a>

39
go.mod

@ -0,0 +1,39 @@
module decentral1se/sshww
go 1.18
require (
github.com/charmbracelet/bubbles v0.10.3
github.com/charmbracelet/bubbletea v0.20.0
github.com/charmbracelet/glamour v0.5.0
github.com/charmbracelet/lipgloss v0.4.0
github.com/charmbracelet/wish v0.3.0
github.com/gliderlabs/ssh v0.3.3
)
require (
github.com/alecthomas/chroma v0.10.0 // indirect
github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be // indirect
github.com/aymerick/douceur v0.2.0 // indirect
github.com/charmbracelet/keygen v0.2.1 // indirect
github.com/containerd/console v1.0.3 // indirect
github.com/dlclark/regexp2 v1.4.0 // indirect
github.com/gorilla/css v1.0.0 // indirect
github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
github.com/mattn/go-isatty v0.0.14 // indirect
github.com/mattn/go-runewidth v0.0.13 // indirect
github.com/microcosm-cc/bluemonday v1.0.17 // indirect
github.com/mikesmitty/edkey v0.0.0-20170222072505-3356ea4e686a // indirect
github.com/mitchellh/go-homedir v1.1.0 // indirect
github.com/muesli/ansi v0.0.0-20211018074035-2e021307bc4b // indirect
github.com/muesli/reflow v0.3.0 // indirect
github.com/muesli/termenv v0.11.1-0.20220212125758-44cd13922739 // indirect
github.com/olekukonko/tablewriter v0.0.5 // 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/crypto v0.0.0-20210817164053-32db794688a5 // indirect
golang.org/x/net v0.0.0-20210614182718-04defd469f4e // indirect
golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c // indirect
golang.org/x/term v0.0.0-20210422114643-f5beecf764ed // indirect
)

99
go.sum

@ -0,0 +1,99 @@
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/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be h1:9AeTilPcZAjCFIImctFaOjnTIavg87rW78vTPkQqLI8=
github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be/go.mod h1:ySMOLuWl6zY27l47sB3qLNK6tF2fkHG55UZxx8oIVo4=
github.com/atotto/clipboard v0.1.4/go.mod h1:ZY9tmq7sm5xIbd9bOK4onWV4S6X0u6GY7Vn0Yu86PYI=
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/bubbles v0.10.3 h1:fKarbRaObLn/DCsZO4Y3vKCwRUzynQD9L+gGev1E/ho=
github.com/charmbracelet/bubbles v0.10.3/go.mod h1:jOA+DUF1rjZm7gZHcNyIVW+YrBPALKfpGVdJu8UiJsA=
github.com/charmbracelet/bubbletea v0.19.3/go.mod h1:VuXF2pToRxDUHcBUcPmCRUHRvFATM4Ckb/ql1rBl3KA=
github.com/charmbracelet/bubbletea v0.20.0 h1:/b8LEPgCbNr7WWZ2LuE/BV1/r4t5PyYJtDb+J3vpwxc=
github.com/charmbracelet/bubbletea v0.20.0/go.mod h1:zpkze1Rioo4rJELjRyGlm9T2YNou1Fm4LIJQSa5QMEM=
github.com/charmbracelet/glamour v0.5.0 h1:wu15ykPdB7X6chxugG/NNfDUbyyrCLV9XBalj5wdu3g=
github.com/charmbracelet/glamour v0.5.0/go.mod h1:9ZRtG19AUIzcTm7FGLGbq3D5WKQ5UyZBbQsMQN0XIqc=
github.com/charmbracelet/harmonica v0.1.0/go.mod h1:KSri/1RMQOZLbw7AHqgcBycp8pgJnQMYYT8QZRqZ1Ao=
github.com/charmbracelet/keygen v0.2.1 h1:H1yYTVe6qIDz+UILYXo6q+qLQNkvyXXA5KEhzyuEfzg=
github.com/charmbracelet/keygen v0.2.1/go.mod h1:kFQ3Cvop12fXWX1K29vxDxV9x8ujG4wBSXq//GySSSk=
github.com/charmbracelet/lipgloss v0.4.0 h1:768h64EFkGUr8V5yAKV7/Ta0NiVceiPaV+PphaW1K9g=
github.com/charmbracelet/lipgloss v0.4.0/go.mod h1:vmdkHvce7UzX6xkyf4cca8WlwdQ5RQr8fzta+xl7BOM=
github.com/charmbracelet/wish v0.3.0 h1:DsQ7wC5BfiQz07iOGiWB4GWJM53O4BPt3koO1Gqxw5w=
github.com/charmbracelet/wish v0.3.0/go.mod h1:KB8u7Bp4a/akXmGVqy+R/2OhMxgNoeJ+3lDgSgBrog4=
github.com/containerd/console v1.0.2/go.mod h1:ytZPjGgY2oeTkAONYafi2kSj0aYggsf8acV1PGKCbzQ=
github.com/containerd/console v1.0.3 h1:lIr7SlA5PxZyMV30bDW0MGbiOPXwc63yRuCP0ARubLw=
github.com/containerd/console v1.0.3/go.mod h1:7LqA/THxQ86k76b8c/EMSiaJ3h1eZkMkXar0TQ1gf3U=
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/gliderlabs/ssh v0.3.3 h1:mBQ8NiOgDkINJrZtoizkC3nDNYgSaWtxyem6S2XHBtA=
github.com/gliderlabs/ssh v0.3.3/go.mod h1:ZSS+CUoKHDrqVakTfTWUlKSr9MtMFkC4UvtQKD7O914=
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/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
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 v0.0.10/go.mod h1:RAqKPSqVFrSLVXbA8x7dzmKdmGzieGRCM46jaSJTDAk=
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 h1:Z1a//hgsQ4yjC+8zEkV8IWySkXnsxmdSY642CTFQb5Y=
github.com/microcosm-cc/bluemonday v1.0.17/go.mod h1:Z0r70sCuXHig8YpBzCc5eGHAap2K7e/u082ZUpDRRqM=
github.com/mikesmitty/edkey v0.0.0-20170222072505-3356ea4e686a h1:eU8j/ClY2Ty3qdHnn0TyW3ivFoPC/0F1gQZz8yTxbbE=
github.com/mikesmitty/edkey v0.0.0-20170222072505-3356ea4e686a/go.mod h1:v8eSC2SMp9/7FTKUncp7fH9IwPfw+ysMObcEz5FWheQ=
github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
github.com/muesli/ansi v0.0.0-20211018074035-2e021307bc4b h1:1XF24mVaiu7u+CFywTdcDo2ie1pzzhwjt6RHqzpMU34=
github.com/muesli/ansi v0.0.0-20211018074035-2e021307bc4b/go.mod h1:fQuZ0gauxyBcmsdE3ZT4NasjaRdxmbCS0jRHsrWu3Ho=
github.com/muesli/reflow v0.2.1-0.20210115123740-9e1d0d53df68/go.mod h1:Xk+z4oIWdQqJzsxyjgl3P22oYZnHdZ8FFTHAQQt5BMQ=
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 v0.11.1-0.20220212125758-44cd13922739 h1:QANkGiGr39l1EESqrE0gZw0/AJNYzIvoGLhIoVYtluI=
github.com/muesli/termenv v0.11.1-0.20220212125758-44cd13922739/go.mod h1:Bd5NYQ7pd+SrtBSrSNoBBmXlcY8+Xj4BMJgh8qcZrvs=
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/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
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/sahilm/fuzzy v0.1.0/go.mod h1:VFvziUEIMCrT6A6tw2RFIXPXXmzXbOsSHF0DOI8ZK9Y=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
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/crypto v0.0.0-20210616213533-5ff15b29337e/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.0.0-20210817164053-32db794688a5 h1:HWj/xjIHfjYU5nVXpTM0s39J9CbLn7Cc5a7IC5rwsMQ=
golang.org/x/crypto v0.0.0-20210817164053-32db794688a5/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
golang.org/x/net v0.0.0-20210614182718-04defd469f4e h1:XpT3nA5TvE525Ne3hInMh6+GETgn27Zfm9dxsThnX2Q=
golang.org/x/net v0.0.0-20210614182718-04defd469f4e/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 v0.0.0-20210119212857-b64e53b001e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20210616094352-59db8d763f22/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c h1:F1jZWGFhYfh0Ci55sIpILtKKK8p3i2/krTr0H1rg74I=
golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/term v0.0.0-20210422114643-f5beecf764ed h1:Ei4bQjjpYUsS4efOUz+5Nz++IVkHk87n2zBA0NxBWc0=
golang.org/x/term v0.0.0-20210422114643-f5beecf764ed/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

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316
sshww.go

@ -0,0 +1,316 @@
package main
import (
"context"
"errors"
"flag"
"fmt"
"io/ioutil"
"log"
"os"
"os/signal"
"path/filepath"
"sort"
"strconv"
"strings"
"syscall"
"time"
"github.com/charmbracelet/bubbles/viewport"
tea "github.com/charmbracelet/bubbletea"
"github.com/charmbracelet/glamour"
"github.com/charmbracelet/lipgloss"
"github.com/charmbracelet/wish"
bm "github.com/charmbracelet/wish/bubbletea"
lm "github.com/charmbracelet/wish/logging"
"github.com/gliderlabs/ssh"
)
const help = `ssh-warm-welcome: warm welcome pages over SSH
Options:
-p port for ssh server (default: 1312)
-h output help
`
var portFlag int
var helpFlag bool
var (
titleStyle = func() lipgloss.Style {
b := lipgloss.RoundedBorder()
b.Right = "├"
return lipgloss.NewStyle().BorderStyle(b).Padding(0, 1)
}()
selectedTitleStyle = func() lipgloss.Style {
b := lipgloss.RoundedBorder()
b.Right = "├"
return lipgloss.NewStyle().Underline(true).BorderStyle(b).Padding(0, 1)
}()
infoStyle = func() lipgloss.Style {
b := lipgloss.RoundedBorder()
b.Left = "┤"
return titleStyle.Copy().BorderStyle(b)
}()
)
func main() {
handleCliFlags()
if helpFlag {
fmt.Printf(help)
os.Exit(0)
}
if err := validatePages(); err != nil {
log.Fatalf(err.Error())
}
s, err := wish.NewServer(
wish.WithAddress(fmt.Sprintf("%s:%d", "0.0.0.0", portFlag)),
wish.WithHostKeyPath(".ssh/term_info_ed25519"),
wish.WithMiddleware(
bm.Middleware(teaHandler),
lm.Middleware(),
),
)
if err != nil {
log.Fatalln(err)
}
done := make(chan os.Signal, 1)
signal.Notify(done, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)
log.Printf("warm welcome waiting on port :%d", portFlag)
go func() {
if err = s.ListenAndServe(); err != nil {
log.Fatalln(err)
}
}()
<-done
log.Println("turning off now...")
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer func() { cancel() }()
if err := s.Shutdown(ctx); err != nil {
log.Fatalln(err)
}
}
func teaHandler(s ssh.Session) (tea.Model, []tea.ProgramOption) {
pages, err := gatherPages()
if err != nil {
log.Fatalf(err.Error())
}
model, err := initModel(pages)
if err != nil {
log.Fatalf("unable to initialise model? (%s)", err.Error())
}
return model, []tea.ProgramOption{tea.WithAltScreen()}
}
func handleCliFlags() {
flag.IntVar(&portFlag, "p", 1312, "port for ssh server")
flag.BoolVar(&helpFlag, "h", false, "output help")
flag.Parse()
}
type page struct {
name string
path string
contents string
rendered string
}
type pages map[int]page
func sortByConvention(files []os.FileInfo) {
sort.Slice(files, func(i, j int) bool {
if files[i].Name() == "welcome.md" {
return true // always top of the list
}
return files[i].Name() < files[j].Name()
})
}
func validatePages() error {
warmWelcomeDir, err := filepath.Abs("warm-welcome")
if err != nil {
return err
}
if _, err := os.Stat(warmWelcomeDir); os.IsNotExist(err) {
return errors.New("'warm-welcome' directory missing from current working directory?")
}
files, err := ioutil.ReadDir(warmWelcomeDir)
if err != nil {
return fmt.Errorf("unable to list files in %s (%s)", warmWelcomeDir, err.Error())
}
hasWelcome := false
for _, file := range files {
if file.Name() == "welcome.md" {
hasWelcome = true
}
}
if !hasWelcome {
return errors.New("welcome.md is missing from warm-welcome directory (required)?")
}
return nil
}
func gatherPages() (pages, error) {
pages := make(map[int]page)
warmWelcomeDir, err := filepath.Abs("warm-welcome")
if err != nil {
return pages, err
}
files, err := ioutil.ReadDir(warmWelcomeDir)
if err != nil {
return pages, fmt.Errorf("unable to list files in %s (%s)", warmWelcomeDir, err.Error())
}
sortByConvention(files)
for idx, file := range files {
filePath := filepath.Join(warmWelcomeDir, file.Name())
contents, err := ioutil.ReadFile(filePath)
if err != nil {
return pages, fmt.Errorf("unable to read %s (%s)", filePath, err.Error())
}
rendered, err := glamour.Render(string(contents), "dark")
if err != nil {
return pages, err
}
pages[idx] = page{
name: file.Name(),
path: filePath,
contents: string(contents),
rendered: rendered,
}
}
return pages, nil
}
type model struct {
pages map[int]page
pageIndex int
viewport viewport.Model
ready bool
}
func initModel(pgs pages) (model, error) {
return model{pages: pgs}, nil
}
func (m model) Init() tea.Cmd {
return nil
}
func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
switch msg := msg.(type) {
case tea.KeyMsg:
switch msg.String() {
case "ctrl+c", "q":
return m, tea.Quit
case "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10":
idx, err := strconv.Atoi(msg.String())
if err == nil {
if _, ok := m.pages[idx-1]; ok {
m.pageIndex = idx - 1
m.viewport.SetContent(m.pages[m.pageIndex].rendered)
m.viewport.GotoTop()
}
}
return m, nil
default:
m.viewport.Update(msg)
}
case tea.WindowSizeMsg:
headerHeight := lipgloss.Height(m.headerView())
footerHeight := lipgloss.Height(m.footerView()) + lipgloss.Height(m.helpView())
verticalMarginHeight := headerHeight + footerHeight
if !m.ready {
m.viewport = viewport.New(msg.Width, msg.Height-verticalMarginHeight)
m.viewport.YPosition = headerHeight
m.viewport.SetContent(m.pages[m.pageIndex].rendered)
m.ready = true
} else {
m.viewport.Width = msg.Width
m.viewport.Height = msg.Height - verticalMarginHeight
}
}
var cmd tea.Cmd
m.viewport, cmd = m.viewport.Update(msg)
return m, tea.Batch(cmd)
}
func (m model) View() string {
if !m.ready {
return "\n initializing..."
}
header := m.headerView()
viewp := m.viewport.View()
footer := m.footerView()
return fmt.Sprintf("%s\n%s\n%s\n%s", header, viewp, footer, m.helpView())
}
func (m model) helpView() string {
return "↑/↓: scroll pager • 1/2/3... choose page • q: quit"
}
func (m model) headerView() string {
indices := make([]int, 0, len(m.pages))
for idx := range m.pages {
indices = append(indices, idx)
}
sort.Ints(indices)
var pagesTotalWidth int
var header []string
for _, idx := range indices {
var pageRender string
if idx == m.pageIndex {
pageRender = selectedTitleStyle.Render(m.pages[idx].name)
} else {
pageRender = titleStyle.Render(m.pages[idx].name)
}
header = append(header, pageRender)
pagesTotalWidth += lipgloss.Width(pageRender)
}
line := strings.Repeat("─", max(0, m.viewport.Width-pagesTotalWidth))
header = append(header, line)
return lipgloss.JoinHorizontal(lipgloss.Center, header...)
}
func (m model) footerView() string {
info := infoStyle.Render(fmt.Sprintf("%3.f%%", m.viewport.ScrollPercent()*100))
line := strings.Repeat("─", max(0, m.viewport.Width-lipgloss.Width(info)))
return lipgloss.JoinHorizontal(lipgloss.Center, line, info)
}
func max(a, b int) int {
if a > b {
return a
}
return b
}
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