borg/docs/misc/asciinema/record.sh
Thomas Waldmann 19f456d20d
new borg 1.4 demo screencast, recorded in a container
Backport of the borg2 demo automation to 1.4-maint, adapted to the borg 1.x
command syntax (borg init, repo::archive, no archive series / archive IDs,
no undelete).

record.sh builds borg from the git tag given by BORG_VERSION in a container
(podman or docker, see #8040), generates the demo data and records the whole
demo automatically - so re-recording it for a new release is one command.

The demo data is generated by demo-data.py: compressible, but not trivially
repetitive, so compression and deduplication show realistic numbers (#6303).

Removes the old borg 1.2 era Vagrant based install/basic/advanced scripts
and their casts.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-22 01:05:25 +02:00

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#!/bin/sh
# Record the borg 1.4 demo screencast in a container, see README.rst.
#
# Usage: ./record.sh [output directory]
#
# Set ENGINE=docker if you do not want to use podman.
set -eu
# The borg release the screencast is recorded with: borg is built from this git
# tag and the tag is what borg --version shows in the screencast. Update it for
# every screencast we publish. Use BORG_VERSION=HEAD (or export it in your
# environment) to record from your work tree while working on the demo.
BORG_VERSION="${BORG_VERSION:-1.4.5}"
cd "$(dirname "$0")"
OUTDIR=$(cd "${1:-.}" && pwd)
ENGINE=${ENGINE:-podman}
command -v "$ENGINE" > /dev/null || { echo "$ENGINE not found, set ENGINE=docker?" >&2; exit 1; }
ROOT=$(git rev-parse --show-toplevel)
git -C "$ROOT" rev-parse --verify --quiet "$BORG_VERSION^{commit}" > /dev/null || {
echo "no such git tag / commit: $BORG_VERSION - tag the release first?" >&2; exit 1; }
# The exported sources have no .git, so we have to tell setuptools-scm the
# version. For HEAD that is something like 1.4.5.dev42+g0123456.
if [ "$BORG_VERSION" = HEAD ]; then
VERSION=$(git -C "$ROOT" describe --tags --match '[0-9]*' \
| sed -e 's/-\([0-9]*\)-g\([0-9a-f]*\)$/.dev\1+g\2/')
else
VERSION="$BORG_VERSION"
fi
# Build the image from a clean context: the borg sources of that tag plus the
# scripts in this directory (and not the whole, possibly dirty, work tree).
CONTEXT=$(mktemp -d)
trap 'rm -rf "$CONTEXT"' EXIT
git -C "$ROOT" archive --format=tar --prefix=borg/ "$BORG_VERSION" > "$CONTEXT/borg-src.tar"
cp Containerfile demo.tcl demo-data.py record.exp entrypoint.sh "$CONTEXT/"
echo "recording with borg $VERSION"
$ENGINE build -t borg14-demo-screencast --build-arg "BORG_VERSION=$VERSION" "$CONTEXT"
# --device /dev/fuse and SYS_ADMIN are needed for the "borg mount" part.
# Without label=disable, the files we back up have a security.selinux xattr,
# which borg extract then complains about (in the middle of the screencast).
$ENGINE run --rm -t \
--hostname host \
--device /dev/fuse --cap-add SYS_ADMIN \
--security-opt apparmor=unconfined --security-opt label=disable \
-v "$OUTDIR:/out" \
borg14-demo-screencast
echo
echo "Play it: asciinema play $OUTDIR/borg14-demo.cast"
echo "Upload it: asciinema upload $OUTDIR/borg14-demo.cast"