Figure out and document styling of player.

Signed-off-by: Fabian Kammel <fk@edgeless.systems>

docs/docs/workflows/verify-cli.md

@@ -2,7 +2,7 @@
 
 import AsciinemaWidget from '../../src/components/AsciinemaWidget';
 
-<AsciinemaWidget src="/constellation/assets/verify-cli.cast" fontSize={16} rows={18} cols={80} idleTimeLimit={3} preload={true} />
+<AsciinemaWidget src="/constellation/assets/verify-cli.cast" fontSize={16} rows={18} cols={80} idleTimeLimit={3} preload={true} theme={'edgeless'} />
 
 Edgeless Systems uses [sigstore](https://www.sigstore.dev/) and [SLSA](https://slsa.dev) to ensure supply-chain security for the Constellation CLI and node images ("artifacts"). sigstore consists of three components: [Cosign](https://docs.sigstore.dev/cosign/overview), [Rekor](https://docs.sigstore.dev/rekor/overview), and Fulcio. Edgeless Systems uses Cosign to sign artifacts. All signatures are uploaded to the public Rekor transparency log, which resides at https://rekor.sigstore.dev/.
 

docs/screencasts/README.md

@@ -0,0 +1,61 @@
+# Screencast / Asciinema
+
+[Asciinema](https://github.com/asciinema/asciinema) is used to automatically generate
+terminal session recordings for our documentation. To fully automate this we use scripts
+that utilize [expect](https://linux.die.net/man/1/expect) to interface with different
+CLI tools, and run them inside a [container](docker/Dockerfile).
+
+## Usage
+
+```sh
+./generate-screencasts.sh
+```
+
+This will:
++ build the container
++ run the expect based scripts
++ copy recordings into the assets folder of our docs
+
+To replay the output you can use `asciinema play recordings/verify-cli.cast`.
+
+Include the generated screencast into our docs using the [`AsciinemaWidget`](../src/components/AsciinemaWidget/index.js):
+
+```md
+import AsciinemaWidget from '../../src/components/AsciinemaWidget';
+
+<AsciinemaWidget src="/constellation/assets/verify-cli.cast" fontSize={16} rows={18} cols={80} idleTimeLimit={3} preload={true} theme={'edgeless'} />
+```
+
+Then [re-build and locally host the docs](../README.md).
+
+## Styling
+
+There are three different locations were styling is applied:
+
+1. **The prompt** is styled using [ANSI escape codes](https://en.wikipedia.org/wiki/ANSI_escape_code).
+More explanation and the actual color codes can be found in [Dockerfile](docker/Dockerfile).
+2. **Font size and player dimensions** are passed to the [`AsciinemaWidget`](../src/components/AsciinemaWidget/index.js)
+when it is [embedded in the docs](../docs/workflows/verify-cli.md#5). Check the `asciinema-player` for a
+[full list of options](https://github.com/asciinema/asciinema-player#options).
+3. **Everything else** is [styled via CSS](../src/css/custom.css). This includes the option to build a custom
+[player theme](https://github.com/asciinema/asciinema-player/wiki/Custom-terminal-themes).
+
+## GitHub README.md
+
+The GitHub `README.md` does not support embedding the `asciinema-player`, therefore we generate an
+`svg` file for that usecase.
+
+{"version": 2, "width": 0, "height": 0, "timestamp": 1676289328, "env": {"SHELL": "/bin/bash", "TERM": "xterm-256color"}}
+
+=> TODO: Automate that change
+
+{"version": 2, "width": 95, "height": 17, "timestamp": 1676289328, "env": {"SHELL": "/bin/bash", "TERM": "xterm-256color"}}
+
+```sh
+# https://github.com/nbedos/termtosvg
+# Archived since 2020, do we want to change?
+pip3 install termtosvg
+# Window-frame.svg contains the styling information
+termtosvg render recordings/readme.cast readme.svg -t window-frame.svg
+cp readme.svg ../static/img/shell-windowframe.svg
+```

docs/screencasts/demo.svg

@@ -0,0 +1,66 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" id="terminal" baseProfile="full" viewBox="0 0 143 285" width="143" version="1.1">
+    <defs>
+        <termtosvg:template_settings xmlns:termtosvg="https://github.com/nbedos/termtosvg">
+            <termtosvg:screen_geometry columns="12" rows="12"/>
+            <termtosvg:animation type="css"/>
+        </termtosvg:template_settings>
+        <style type="text/css" id="generated-style"><![CDATA[#screen {
+                font-family: 'DejaVu Sans Mono', monospace;
+                font-style: normal;
+                font-size: 14px;
+            }
+
+        text {
+            dominant-baseline: text-before-edge;
+            white-space: pre;
+        }
+    
+            :root {
+                --animation-duration: 1001ms;
+            }
+
+            @keyframes roll {
+                0.000%{transform:translateY(0px)}
+0.100%{transform:translateY(-238px)}
+100.000%{transform:translateY(-238px)}
+            }
+
+            #screen_view {
+                animation-duration: 1001ms;
+                animation-iteration-count:infinite;
+                animation-name:roll;
+                animation-timing-function: steps(1,end);
+                animation-fill-mode: forwards;
+            }
+        ]]></style>
+        <style type="text/css" id="user-style">
+            /* The colors defined below are the default 16 colors used for rendering text of the terminal. Adjust
+               them as needed.
+               gjm8 color theme (source: https://terminal.sexy/) */
+            /* customized colors 10, 11, and 14 */
+            .foreground {fill: #f8f8f2}
+            .background {fill: #272822}
+            .color0 {fill: #272822}
+            .color1 {fill: #f92672}
+            .color2 {fill: #a6e22e}
+            .color3 {fill: #f4bf75}
+            .color4 {fill: #66d9ef}
+            .color5 {fill: #ae81ff}
+            .color6 {fill: #a1efe4}
+            .color7 {fill: #f8f8f2}
+            .color8 {fill: #75715e}
+            .color9 {fill: #fd971f}
+            .color10 {fill: #8b04dd}
+            .color11 {fill: #dcaf3b}
+            .color12 {fill: #a59f85}
+            .color13 {fill: #f5f4f1}
+            .color14 {fill: #90ff99}
+            .color15 {fill: #f9f8f5}
+        </style>
+    </defs>
+    <rect id="terminalui" class="background" width="100%" height="100%" ry="4.5826941"/>
+    <circle cx="24" cy="23" r="7" class="color1"/>
+    <circle cx="44" cy="23" r="7" class="color3"/>
+    <circle cx="64" cy="23" r="7" class="color2"/>
+    <svg id="screen" width="96" height="204" x="23" y="50" viewBox="0 0 96 204" preserveAspectRatio="xMidYMin slice"><rect class="background" height="100%" width="100%" x="0" y="0"/><defs><g id="g1"><text x="0" textLength="8" class="background"> </text></g><g id="g2"><text x="0" textLength="96" class="foreground">\[\e[43;30m\</text></g><g id="g3"><text x="0" textLength="96" class="foreground">][\t]\w\r\n[</text></g><g id="g4"><text x="0" textLength="96" class="foreground">\u@\h]\$\[\e</text></g><g id="g5"><text x="0" textLength="40" class="foreground">[0m\]</text><text x="40" textLength="8" class="background"> </text></g></defs><g id="screen_view"><g><rect x="0" y="0" width="8" height="17" class="foreground"/><use xlink:href="#g1" y="0"/></g><g><use xlink:href="#g2" y="238"/><use xlink:href="#g3" y="255"/><use xlink:href="#g4" y="272"/><rect x="40" y="289" width="8" height="17" class="foreground"/><use xlink:href="#g5" y="289"/></g></g></svg>
+</svg>

docs/screencasts/docker/Dockerfile

@@ -14,9 +14,18 @@ ENV PATH="${PATH}:/usr/local/go/bin:/root/go/bin"
 RUN go install github.com/sigstore/cosign/cmd/cosign@latest
 RUN go install github.com/sigstore/rekor/cmd/rekor-cli@latest
 
-ENV SHELL=/bin/bash
+# Enable RGB colors in PS1
 ENV TERM=xterm-256color
-ENV COLUMNS=200
+# Set width of terminal, default is ~80 and leads to broken lines for long lines,
+# e.g., curl & cosign commands.
+ENV COLUMNS=512
+# For PS1 to work shell needs to specified
+ENV SHELL=/bin/bash
+# ANSI color codes are used to control PS1 prompt. We use "\033[38;2;<r>;<g>;<b>m"
+# to control the foreground color with RBG colors [1]. Non-printable characters
+# need to  be escaped with additional \[ and \], see [2].
+# [1]: https://stackoverflow.com/a/33206814/2306355
+# [2]: https://stackoverflow.com/a/19501528/2306355
 RUN echo 'export PS1="\[\033[38;2;144;255;153m\]~/constellation\[\033[0m\]\r\n\[\033[38;2;139;4;221m\]$\[\033[0m\] "' >> /root/.bashrc
 
 # Copy install scripts

docs/screencasts/docker/check-sbom.sh

@@ -7,7 +7,7 @@ set CTRLC \003
 set record_name [lindex $argv 0];
 
 proc expect_prompt {} {
-    # make sure this matches your prompt
+    # This matches the trailing 0m of our ANSI control sequence. See PS1 in Dockerfile.
     expect "0m "
 }
 
@@ -17,12 +17,6 @@ proc run_command {cmd} {
     expect -timeout 1
 }
 
-proc send_keystroke_to_interactive_process {key {addl_sleep 2}} {
-    send "$key"
-    expect -timeout 1
-    sleep $addl_sleep
-}
-
 # Start recording
 spawn asciinema rec --overwrite /recordings/check-sbom.cast
 send "\r"
@@ -47,7 +41,7 @@ run_command "curl -sLO https://github.com/edgelesssys/constellation/releases/lat
 expect_prompt
 run_command "grype constellation.spdx.sbom -o table -q"
 expect_prompt
-run_command "echo We are safe! :)"
+run_command "echo We are safe!"
 
 # Stop recording
 send "exit"

docs/screencasts/docker/verify-cli.sh

@@ -2,18 +2,19 @@
 # Note: Expects to be able to run 'sudo install' without a password
 
 set timeout -1
-set send_human {0.005 0.015 1 0.05 0.3}
+set send_human {0.05 0 1 0.05 0.3}
 set CTRLC \003
 set record_name [lindex $argv 0];
 
 proc expect_prompt {} {
-    # make sure this matches your prompt
+    # This matches the trailing 0m of our ANSI control sequence. See PS1 in Dockerfile.
     expect "0m "
 }
 
 proc run_command {cmd} {
-    send -h "$cmd\r"
+    send -h "$cmd"
-    expect -timeout 3
+    send "\r"
+    expect -timeout 1
 }
 
 # Start recording
@@ -22,25 +23,26 @@ send "\r"
 expect_prompt
 
 ### Step 0: Requirements
-# run_command "echo Step 0: Installing requirements"
+run_command "echo Step 0: Installing requirements"
-# expect_prompt
+expect_prompt
-# run_command "go install github.com/sigstore/cosign/cmd/cosign@latest"
+run_command "go install github.com/sigstore/cosign/cmd/cosign@latest"
-# expect_prompt
+expect_prompt
-# run_command "go install github.com/sigstore/rekor/cmd/rekor-cli@latest"
+run_command "go install github.com/sigstore/rekor/cmd/rekor-cli@latest"
-# expect_prompt
+expect_prompt
 
 ### Step 1: Download CLI
 run_command "echo Step 1: Download CLI and signature"
 expect_prompt
-run_command "curl -LO https://github.com/edgelesssys/constellation/releases/latest/download/constellation-linux-amd64"
+run_command "curl -sLO https://github.com/edgelesssys/constellation/releases/download/v2.2.2/constellation-linux-amd64"
 expect_prompt
-run_command "curl -LO https://github.com/edgelesssys/constellation/releases/latest/download/constellation-linux-amd64.sig"
+run_command "curl -sLO https://github.com/edgelesssys/constellation/releases/download/v2.2.2/constellation-linux-amd64.sig"
 expect_prompt
 
 ### Step 2: Verify the CLI using cosign
 run_command "echo Step 2: Verify the CLI using cosign and the public Rekor transparency log"
 expect_prompt
-run_command "COSIGN_EXPERIMENTAL=1 cosign verify-blob --key https://edgeless.systems/es.pub --signature constellation-linux-amd64.sig constellation-linux-amd64"
+# run_command "COSIGN_EXPERIMENTAL=1 cosign verify-blob --key https://edgeless.systems/es.pub --signature constellation-linux-amd64.sig constellation-linux-amd64"
+run_command "COSIGN_EXPERIMENTAL=1 cosign verify-blob --key https://github.com/edgelesssys/constellation/releases/download/v2.2.2/cosign.pub --signature constellation-linux-amd64.sig constellation-linux-amd64"
 expect_prompt
 
 ### Step 2b: Verify the CLI manually

docs/screencasts/generate-screencasts.sh

@@ -3,14 +3,9 @@
 docker build -t screenrecodings docker
 
 # Generate cast to verify CLI
-docker run -it -v "$(pwd)"/recordings:/recordings screenrecodings
+docker run -it -v "$(pwd)"/recordings:/recordings screenrecodings verify-cli.sh
 cp recordings/verify-cli.cast ../static/assets/verify-cli.cast
 
 # Generate cast to check SBOM
-# docker run -it -v "$(pwd)"/recordings:/recordings screenrecodings check-sbom.sh /recordings/check-sbom.cast
+docker run -it -v "$(pwd)"/recordings:/recordings screenrecodings check-sbom.sh
-# cp recordings/check-sbom.cast ../static/assets/check-sbom.cast
+cp recordings/check-sbom.cast ../static/assets/check-sbom.cast
-
-# docker rm -f recorder || true
-# docker build -t screenrecodings docker
-# docker run --name recorder -d -v "$(pwd)"/recordings:/recordings screenrecodings
-# docker exec recorder /bin/bash < . check-sbom.sh /recordings/check-sbom.cast

docs/screencasts/window-frame.svg

@@ -0,0 +1,38 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" id="terminal" baseProfile="full" viewBox="0 0 703 404" width="703" version="1.1">
+    <defs>
+        <termtosvg:template_settings xmlns:termtosvg="https://github.com/nbedos/termtosvg">
+            <termtosvg:screen_geometry columns="82" rows="19"/>
+            <termtosvg:animation type="css"/>
+        </termtosvg:template_settings>
+        <style type="text/css" id="generated-style"></style>
+        <style type="text/css" id="user-style">
+            /* The colors defined below are the default 16 colors used for rendering text of the terminal. Adjust
+               them as needed.
+               gjm8 color theme (source: https://terminal.sexy/) */
+            /* customized colors 10, 11, and 14 */
+            .foreground {fill: #f8f8f2}
+            .background {fill: #272822}
+            .color0 {fill: #272822}
+            .color1 {fill: #f92672}
+            .color2 {fill: #a6e22e}
+            .color3 {fill: #f4bf75}
+            .color4 {fill: #66d9ef}
+            .color5 {fill: #ae81ff}
+            .color6 {fill: #a1efe4}
+            .color7 {fill: #f8f8f2}
+            .color8 {fill: #75715e}
+            .color9 {fill: #fd971f}
+            .color10 {fill: #8b04dd}
+            .color11 {fill: #dcaf3b}
+            .color12 {fill: #a59f85}
+            .color13 {fill: #f5f4f1}
+            .color14 {fill: #90ff99}
+            .color15 {fill: #f9f8f5}
+        </style>
+    </defs>
+    <rect id="terminalui" class="background" width="100%" height="100%" ry="4.5826941"/>
+    <circle cx="24" cy="23" r="7" class="color1"/>
+    <circle cx="44" cy="23" r="7" class="color3"/>
+    <circle cx="64" cy="23" r="7" class="color2"/>
+    <svg id="screen" width="656" height="323" x="23" y="50" viewBox="0 0 656 323" preserveAspectRatio="xMidYMin slice"></svg>
+</svg>

docs/src/css/custom.css

@@ -70,3 +70,17 @@ html[data-theme='dark'] .header-github-link:before {
 .footer--dark {
   background-color: black;
 }
+
+/*
+ * https://github.com/asciinema/asciinema-player/wiki/Custom-terminal-themes
+ */
+.asciinema-theme-edgeless .asciinema-terminal {
+  color: #ffffff;                    /* default text color */
+  background-color: #000000;         /* terminal background color */
+}
+.asciinema-theme-edgeless .fg-bg {    /* inverse for default text color */
+  color: #000000;
+}
+.asciinema-theme-edgeless .bg-fg {    /* inverse for terminal background color */
+  background-color: #ffffff; /* controls color of the cursor */
+}

docs/static/assets/check-sbom.cast

@@ -1,46 +1,449 @@
-{"version": 2, "width": 0, "height": 0, "timestamp": 1675859957, "env": {"SHELL": null, "TERM": "xterm"}}
+{"version": 2, "width": 0, "height": 0, "timestamp": 1676289431, "env": {"SHELL": "/bin/bash", "TERM": "xterm-256color"}}
-[0.003825, "o", "$ "]
+[0.010065, "o", "\u001b[38;2;144;255;153m~/constellation\u001b[0m\r\r\n\u001b[38;2;139;4;221m$\u001b[0m "]
-[0.00491, "o", "e"]
+[0.011766, "o", "e"]
-[0.137328, "o", "c"]
+[0.14535, "o", "c"]
-[0.187967, "o", "h"]
+[0.197918, "o", "h"]
-[0.240046, "o", "o"]
+[0.250453, "o", "o"]
-[0.290357, "o", " "]
+[0.305929, "o", " "]
-[0.340857, "o", "S"]
+[0.358916, "o", "S"]
-[0.390951, "o", "t"]
+[0.417165, "o", "t"]
-[0.511681, "o", "e"]
+[0.562178, "o", "e"]
-[0.56956, "o", "p"]
+[0.619655, "o", "p"]
-[0.61976, "o", " "]
+[0.674731, "o", " "]
-[0.672456, "o", "0"]
+[0.725565, "o", "0"]
-[0.723166, "o", ":"]
+[0.778399, "o", ":"]
-[0.773122, "o", " "]
+[0.828688, "o", " "]
-[0.860846, "o", "I"]
+[0.918494, "o", "I"]
-[0.919429, "o", "n"]
+[0.977915, "o", "n"]
-[0.970394, "o", "s"]
+[1.033904, "o", "s"]
-[1.159058, "o", "t"]
+[1.209349, "o", "t"]
-[1.237391, "o", "a"]
+[1.283352, "o", "a"]
-[1.35056, "o", "l"]
+[1.378754, "o", "l"]
-[1.403067, "o", "l"]
+[1.435191, "o", "l"]
-[1.561877, "o", "i"]
+[1.565195, "o", "i"]
-[1.619898, "o", "n"]
+[1.616437, "o", "n"]
-[1.683962, "o", "g"]
+[1.704011, "o", "g"]
-[1.734714, "o", " "]
+[1.757502, "o", " "]
-[1.788163, "o", "r"]
+[1.81547, "o", "r"]
-[1.846651, "o", "e"]
+[1.876849, "o", "e"]
-[1.910593, "o", "q"]
+[1.929904, "o", "q"]
-[1.979596, "o", "u"]
+[1.986258, "o", "u"]
-[2.03013, "o", "i"]
+[2.044923, "o", "i"]
-[2.080866, "o", "r"]
+[2.095257, "o", "r"]
-[2.184044, "o", "e"]
+[2.202731, "o", "e"]
-[2.239835, "o", "m"]
+[2.256149, "o", "m"]
-[2.289997, "o", "e"]
+[2.306507, "o", "e"]
-[2.34052, "o", "n"]
+[2.357922, "o", "n"]
-[2.394017, "o", "t"]
+[2.421063, "o", "t"]
-[2.447544, "o", "s\r\n"]
+[2.482765, "o", "s\r\nStep 0: Installing requirements\r\n"]
-[2.44777, "o", "Step 0: Installing requirements\r\n$ "]
+[2.483198, "o", "\u001b[38;2;144;255;153m~/constellation\u001b[0m\r\r\n\u001b[38;2;139;4;221m$\u001b[0m "]
-[3.481334, "o", "c"]
+[3.496328, "o", "c"]
-[3.630236, "o", "u"]
+[3.643737, "o", "u"]
-[3.687787, "o", "r"]
+[3.715523, "o", "r"]
-[3.753317, "o", "l"]
+[3.786563, "o", "l"]
-[3.805315, "o", " "]
+[3.843781, "o", " "]
-[3.873631, "o", "-"]
+[3.912909, "o", "-"]
-[3.925427, "o", "s"]
+[3.989469, "o", "s"]
+[4.074841, "o", "L"]
+[4.130715, "o", "O"]
+[4.188683, "o", " "]
+[4.24825, "o", "h"]
+[4.305274, "o", "t"]
+[4.416963, "o", "t"]
+[4.470515, "o", "p"]
+[4.52327, "o", "s"]
+[4.578221, "o", ":"]
+[4.683201, "o", "/"]
+[4.741166, "o", "/"]
+[4.804372, "o", "g"]
+[4.924326, "o", "i"]
+[5.016468, "o", "t"]
+[5.198474, "o", "h"]
+[5.26163, "o", "u"]
+[5.381812, "o", "b"]
+[5.43709, "o", "."]
+[5.562643, "o", "c"]
+[5.616182, "o", "o"]
+[5.886818, "o", "m"]
+[5.938105, "o", "/"]
+[6.011136, "o", "a"]
+[6.091172, "o", "n"]
+[6.142385, "o", "c"]
+[6.193507, "o", "h"]
+[6.250383, "o", "o"]
+[6.333686, "o", "r"]
+[6.385412, "o", "e"]
+[6.436346, "o", "/"]
+[6.487965, "o", "g"]
+[6.539328, "o", "r"]
+[6.591988, "o", "y"]
+[6.647236, "o", "p"]
+[6.705102, "o", "e"]
+[6.762539, "o", "/"]
+[6.819832, "o", "r"]
+[6.987963, "o", "e"]
+[7.038719, "o", "l"]
+[7.233329, "o", "e"]
+[7.343044, "o", "a"]
+[7.393851, "o", "s"]
+[7.444695, "o", "e"]
+[7.49752, "o", "s"]
+[7.550141, "o", "/"]
+[7.601687, "o", "d"]
+[7.665518, "o", "o"]
+[7.728279, "o", "w"]
+[7.857819, "o", "n"]
+[7.912409, "o", "l"]
+[7.964188, "o", "o"]
+[8.022729, "o", "a"]
+[8.082686, "o", "d"]
+[8.143153, "o", "/"]
+[8.208225, "o", "v"]
+[8.263525, "o", "0"]
+[8.314678, "o", "."]
+[8.368788, "o", "5"]
+[8.445452, "o", "6"]
+[8.50976, "o", "."]
+[8.563722, "o", "0"]
+[8.613906, "o", "/"]
+[8.673754, "o", "g"]
+[8.732258, "o", "r"]
+[8.784188, "o", "y"]
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