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73 lines
3.2 KiB
Bash
Executable file
73 lines
3.2 KiB
Bash
Executable file
#!/bin/bash
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set -euo pipefail
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. "$(dirname "$0")"/setup_standard_config.sh
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# NOTE ON TOOLS: the only two nice tools I'm aware of that support our use-case
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# (non-animated svgs) are https://github.com/slowli/term-transcript and
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# https://github.com/FHPythonUtils/AnsiToImg. They have slightly different
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# limitations and advantages. If one of them stops being developed, we could
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# look at the other one.
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#
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# AnsiToImg can also generate PNGs, but that is currently harder to setup than
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# `magick`. `magick` supports different backends. I do not completely
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# understand them. On Debian, it did not work well without `sudo apt install
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# inkscape`. It's unclear to me whether `magick` used Inkscape or one of its
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# dependencies. Inkscape can be also used manually for SVG -> PNG conversion.
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which term-transcript > /dev/null \
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|| (echo '`term-transcript` must be installed with e.g.'\
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'`cargo binstall term-transcript-cli`.' \
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'See also https://github.com/slowli/term-transcript' >&2;
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false)
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which magick > /dev/null \
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|| echo '`magick` from ImageMagick needs to be installed to create pngs.' \
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'Only svgs will be created.' >&2
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echo "jj --version: (set PATH to change)"
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jj --version
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# Make `jj` wrap text as opposed to `term-transcript`. `term-transcript` wraps
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# at 80 columns. Also, 80 seems to be the maximum number of columns that's
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# somewhat readable on mobile devices.
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#
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# Note that `bash` likes to reset the value of $COLUMNS, so we use a different
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# variable here that is interpreted by `run_command()` in `helpers.sh`.
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RUN_COMMAND_COLUMNS=80
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export RUN_COMMAND_COLUMNS
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run_script_through_term_transcript_and_pipe_result_to_stderr() {
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script="$1"
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script_base="${script%.sh}"
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script_base="${script_base#demo_}"
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outfile=$(mktemp --tmpdir "$script_base"-output-XXXX.ansi)
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# We use `term-transcript capture` instead of `term-transcript exec` so that
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# we can show the output of the script via `tee`.
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(bash "$script" || (echo "SCRIPT FAILED WITH EXIT CODE $?"; false)) 2>&1 | \
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tee "$outfile"
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term-transcript capture \
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--no-inputs --pure-svg --palette powershell \
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--font "Fira Code, Liberation Mono, SFMono-Regular, Consolas, Menlo" \
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--out "$script_base".svg "$script_base" < "$outfile"
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# The default font choice term-transcript would make is:
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# SFMono-Regular, Consolas, Liberation Mono, Menlo
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# We add the fonts that were checked and seem to contain all the relevant
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# unicode in front.
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rm "$outfile"
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}
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for script in "$@"; do
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run_script_through_term_transcript_and_pipe_result_to_stderr "$script" 2>&1
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# By default, 1 SVG unit becomes 1 pixel. The term-transcript output
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# defaults to 720 SVG units width.
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#
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# `-background black` is important because the SVGs use transparency to make
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# rounded corners, and the transparent portion becomes white by default.
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# TODO(ilyagr): Figure out if `magick` can make PNGs have transparency.
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#
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# `-resize 100%` is a no-op. `-resize 700x10000`` would make the width 700 px
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# and preserve aspect ratio.
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which magick > /dev/null \
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&& magick "$script_base".svg \
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-colors 63 -background black -resize 100% \
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"$script_base".png \
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|| true
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done
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