81dd43a8eb
Save the original working directory before init scripts cd to /opt/data, then restore it before exec'ing the user command, so the container starts in the Docker -w directory instead of /opt/data. Adds regression test verifying cwd save/restore ordering in main-wrapper.sh.
55 lines
1.9 KiB
Bash
Executable File
55 lines
1.9 KiB
Bash
Executable File
#!/command/with-contenv sh
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# shellcheck shell=sh
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# /opt/hermes/docker/main-wrapper.sh — wraps the container's CMD with
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# the same argument-routing logic the pre-s6 entrypoint.sh used. Runs
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# as /init's "main program" (Docker CMD) so it inherits stdin/stdout/
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# stderr from the container.
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#
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# Shebang note: /init scrubs env before invoking CMD, so a plain
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# `#!/bin/sh` wrapper sees an empty environ and `ENV HERMES_HOME=/opt/data`
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# from the Dockerfile never reaches `hermes`. with-contenv repopulates
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# the env from /run/s6/container_environment before exec'ing, which is
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# what s6-supervised services use too (see main-hermes/run).
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#
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# Routing:
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# no args → exec `hermes` (the default)
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# first arg is an executable → exec it directly (sleep, bash, sh, …)
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# first arg is anything else → exec `hermes <args>` (subcommand passthrough)
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#
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# Drop to hermes via s6-setuidgid, but skip it when already non-root.
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set -e
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drop() { [ "$(id -u)" = 0 ] && set -- s6-setuidgid hermes "$@"; exec "$@"; }
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# HOME comes through with-contenv as /root (the /init context). Override
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# to the hermes user's home before dropping privileges so libraries that
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# resolve paths via $HOME (e.g. discord lockfile under XDG_STATE_HOME)
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# don't try to write to /root.
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export HOME=/opt/data
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# Save the Docker -w (or default) working directory before init
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# scripts cd to /opt/data, so the container starts in the
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# directory the user requested.
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_hermes_orig_cwd="${HERMES_ORIG_CWD:-$PWD}"
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cd /opt/data
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# shellcheck disable=SC1091
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. /opt/hermes/.venv/bin/activate
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# Restore the original working directory before handing off to
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# the user's command so `hermes chat` starts in the Docker -w
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# directory, not /opt/data.
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cd "$_hermes_orig_cwd"
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if [ $# -eq 0 ]; then
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drop hermes
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fi
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if command -v "$1" >/dev/null 2>&1; then
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# Bare executable — pass through directly.
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drop "$@"
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fi
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# Hermes subcommand pass-through.
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drop hermes "$@"
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