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utils/docker-run: mount and pass BR2_EXTERNAL dirs

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The BR2_EXTERNAL environment variable is passed into the container,
and each path listed in it mounted. This allows using external trees
when running a build using utils/docker-run. Testing the existence of
the variable instead of a non-empty value allows passing an empty
BR2_EXTERNAL variable to disable currently set external trees.

The --mount option needs an absolute path for the destination. Make the
paths absolute the same way br2-external itself does it. Do not use
realpath since that resolves symlinks and would make it different from
what is in the BR2_EXTERNAL variable.

Signed-off-by: Fiona Klute <fiona.klute@gmx.de>
Signed-off-by: Arnout Vandecappelle <arnout@rnout.be>
This commit is contained in:
Fiona Klute
2026-04-05 20:56:08 +02:00
committed by Arnout Vandecappelle
parent f1fae6867b
commit ddd4788c1f
1 changed files with 11 additions and 0 deletions
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11
utils/docker-run
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@@ -97,6 +97,17 @@ if [ "${BR2_DL_DIR}" ]; then
docker_opts+=( --env BR2_DL_DIR )
fi
# Testing the existence of the variable instead of a non-empty value
# allows passing an empty BR2_EXTERNAL variable to disable currently
# set external trees.
if [ "${BR2_EXTERNAL+set}" ]; then
docker_opts+=( --env BR2_EXTERNAL )
for br2_ext in ${BR2_EXTERNAL//:/ }; do
# bind volume source paths must be absolute
mountpoints+=( "$(cd "${br2_ext}" && pwd)" )
done
fi
# shellcheck disable=SC2013 # can't use while-read because of the assignment
for dir in $(printf '%s\n' "${mountpoints[@]}" |LC_ALL=C sort -u); do
docker_opts+=( --mount "type=bind,src=${dir},dst=${dir}" )