32efc13d99
Derive a runtime-bin PATH prefix (MOSAIC_RUNTIME_BIN override, then
npm-prefix/bin, then ~/.npm-global/bin / ~/.local/bin) and bake it
into the tmux pane command as `export PATH="<prefix>:${PATH}"; exec
<cmd>` so the runtime binary (mosaic/pi/codex) is always found in a
login+non-interactive pane shell that does not source ~/.bashrc.
Using `exec` makes the runtime the pane foreground process, eliminating
the DRIFT false-positive in `mosaic fleet ps`.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RMoEx7hfdFGjUiCHuN1RRi
152 lines
5.1 KiB
Bash
Executable File
152 lines
5.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -euo pipefail
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SCRIPT_DIR=$(cd -- "$(dirname -- "$0")" && pwd)
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START="$SCRIPT_DIR/start-agent-session.sh"
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SOCKET="mosaic-agent-test-$RANDOM-$$"
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AGENT="agent-$RANDOM"
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WORKDIR=$(mktemp -d)
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# Keep a single cleanup trap that accumulates resources.
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CLEANUP_DIRS=("$WORKDIR")
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CLEANUP_SOCKETS=("$SOCKET")
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trap '_cleanup' EXIT
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_cleanup() {
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for s in "${CLEANUP_SOCKETS[@]:-}"; do
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tmux -L "$s" kill-server >/dev/null 2>&1 || true
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done
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for d in "${CLEANUP_DIRS[@]:-}"; do
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rm -rf "$d"
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done
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}
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fail() {
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echo "FAIL: $*" >&2
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exit 1
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}
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# ── Test 1: basic session creation with workdir check ─────────────────────────
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MOSAIC_TMUX_SOCKET="$SOCKET" \
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MOSAIC_AGENT_WORKDIR="$WORKDIR" \
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MOSAIC_AGENT_COMMAND='bash --noprofile --norc -i' \
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"$START" "$AGENT"
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tmux -L "$SOCKET" has-session -t "=$AGENT:0.0" || fail "agent session was not created"
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actual_dir=$(tmux -L "$SOCKET" display-message -p -t "=$AGENT:0.0" '#{pane_current_path}')
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[ "$actual_dir" = "$WORKDIR" ] || fail "agent workdir mismatch: $actual_dir"
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# ── Test 2: idempotency (duplicate start prints 'already running') ─────────────
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MOSAIC_TMUX_SOCKET="$SOCKET" \
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MOSAIC_AGENT_WORKDIR="$WORKDIR" \
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MOSAIC_AGENT_COMMAND='bash --noprofile --norc -i' \
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"$START" "$AGENT" >/tmp/mosaic-start-agent-idempotent.out
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grep -qF 'already running' /tmp/mosaic-start-agent-idempotent.out || fail "duplicate start was not idempotent"
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# ── Test 3: runtime-bin PATH prefix is baked into the pane command ────────────
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#
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# We capture the command the script would hand to tmux by injecting a fake
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# 'tmux' shim into PATH. The shim:
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# - Intercepts 'new-session' calls and records its arguments to a file.
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# - For 'has-session' calls, exits 1 (session does not exist) so the script
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# proceeds to launch instead of printing "already running".
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# - For all other subcommands, exits 0.
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#
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# Assertions:
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# a) 'export PATH=' with the synthetic MOSAIC_RUNTIME_BIN prefix appears.
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# b) 'exec' appears so the runtime replaces the wrapper shell.
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# c) MOSAIC_AGENT_COMMAND with flags is forwarded intact.
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FAKE_BIN=$(mktemp -d)
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FAKE_RUNTIME_BIN=$(mktemp -d)
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TMUX_ARGS_FILE=$(mktemp)
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CLEANUP_DIRS+=("$FAKE_BIN" "$FAKE_RUNTIME_BIN")
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# Write the fake tmux shim (uses only positional args, no sourced vars).
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cat > "$FAKE_BIN/tmux" <<SHIM
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#!/usr/bin/env bash
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# Fake tmux: record new-session args; report has-session as missing.
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subcmd="\$3" # argv: tmux -L <socket> <subcmd> ...
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if [ "\$subcmd" = "has-session" ]; then
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exit 1 # session not found → script will attempt new-session
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fi
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if [ "\$subcmd" = "new-session" ]; then
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printf '%s\n' "\$@" > "$TMUX_ARGS_FILE"
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exit 0
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fi
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exit 0
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SHIM
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chmod +x "$FAKE_BIN/tmux"
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SOCKET3="mosaic-agent-test3-$RANDOM-$$"
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AGENT3="agent3-$RANDOM"
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WORKDIR3=$(mktemp -d)
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CLEANUP_DIRS+=("$WORKDIR3")
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PATH="$FAKE_BIN:$PATH" \
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MOSAIC_TMUX_SOCKET="$SOCKET3" \
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MOSAIC_AGENT_WORKDIR="$WORKDIR3" \
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MOSAIC_AGENT_RUNTIME="pi" \
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MOSAIC_RUNTIME_BIN="$FAKE_RUNTIME_BIN" \
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MOSAIC_AGENT_COMMAND="mosaic yolo pi --model openai-codex/gpt-5.5:high" \
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"$START" "$AGENT3"
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all_args=$(cat "$TMUX_ARGS_FILE" 2>/dev/null || true)
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rm -f "$TMUX_ARGS_FILE"
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echo "--- captured tmux new-session args ---"
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echo "$all_args"
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echo "--- end args ---"
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# a) PATH prefix containing FAKE_RUNTIME_BIN must appear.
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echo "$all_args" | grep -qF "export PATH=" || fail "pane command does not export PATH"
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echo "$all_args" | grep -qF "$FAKE_RUNTIME_BIN" || fail "pane command does not include MOSAIC_RUNTIME_BIN in PATH prefix"
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# b) exec must appear so the runtime replaces the wrapper shell.
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echo "$all_args" | grep -qF "exec " || fail "pane command does not use exec"
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# c) Full MOSAIC_AGENT_COMMAND (with flags) must be forwarded.
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echo "$all_args" | grep -qF "mosaic yolo pi --model openai-codex/gpt-5.5:high" || \
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fail "pane command does not forward MOSAIC_AGENT_COMMAND with flags intact"
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# ── Test 4: when no extra runtime-bin dirs exist, exec still appears ───────────
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TMUX_ARGS_FILE2=$(mktemp)
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FAKE_BIN2=$(mktemp -d)
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CLEANUP_DIRS+=("$FAKE_BIN2")
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cat > "$FAKE_BIN2/tmux" <<SHIM2
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#!/usr/bin/env bash
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subcmd="\$3"
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if [ "\$subcmd" = "has-session" ]; then exit 1; fi
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if [ "\$subcmd" = "new-session" ]; then
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printf '%s\n' "\$@" > "$TMUX_ARGS_FILE2"
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exit 0
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fi
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exit 0
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SHIM2
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chmod +x "$FAKE_BIN2/tmux"
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SOCKET4="mosaic-agent-test4-$RANDOM-$$"
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AGENT4="agent4-$RANDOM"
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WORKDIR4=$(mktemp -d)
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CLEANUP_DIRS+=("$WORKDIR4")
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# MOSAIC_RUNTIME_BIN points to a non-existent dir so prefix will be empty;
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# .npm-global/bin and .local/bin may or may not exist but we just want exec.
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PATH="$FAKE_BIN2:$PATH" \
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MOSAIC_TMUX_SOCKET="$SOCKET4" \
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MOSAIC_AGENT_WORKDIR="$WORKDIR4" \
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MOSAIC_AGENT_RUNTIME="pi" \
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MOSAIC_RUNTIME_BIN="/nonexistent-dir-$$" \
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MOSAIC_AGENT_COMMAND="mosaic yolo pi" \
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"$START" "$AGENT4"
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all_args4=$(cat "$TMUX_ARGS_FILE2" 2>/dev/null || true)
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rm -f "$TMUX_ARGS_FILE2"
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rm -rf "$WORKDIR4"
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echo "$all_args4" | grep -qF "exec " || fail "pane command (no prefix dirs) does not use exec"
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echo "$all_args4" | grep -qF "mosaic yolo pi" || fail "pane command does not include agent command when no prefix"
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echo "ok - start-agent-session"
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