z21_epic_main.sh: block propagation of $1

[veprbl]

Currently a simple

singularity exec /cvmfs/eic.opensciencegrid.org/singularity/eicweb/eic_xl:26.07.1-stable eicrecon test.edm4hep.root

fails with

ERROR: file: /opt/software/linux-x86_64_v2/epic-26.07.1-uzwreubimqduvctpoysj5wmbj6ay5emu/share/epic/eicrecon.xml does not exist!
Check that your DETECTOR_PATH and DETECTOR_CONFIG environment variables are set correctly.

i.e. eicrecon is passed as $1 and is used by entrypoint.sh as the command to exec and by thisepic.sh to set DETECTOR_CONFIG.

This will source thisepic.sh in such a way that no detector config is set.

[github-actions]

Capybara summary for PR 430

• rec_dis_10x100_minQ2=1000_epic_craterlake_amd64 (Δ: 1) (new artifact) (ref artifact)
• rec_dis_10x100_minQ2=1_epic_craterlake_amd64 (Δ: 1) (new artifact) (ref artifact)
• rec_dis_18x275_minQ2=1000_epic_craterlake_amd64 (Δ: 1) (new artifact) (ref artifact)
• rec_dis_18x275_minQ2=1_epic_craterlake_amd64 (Δ: 1) (new artifact) (ref artifact)
• rec_dis_5x41_minQ2=1_epic_craterlake_amd64 (Δ: 1) (new artifact) (ref artifact)
• rec_dis_5x41_minQ2=1_epic_craterlake_amd64_vs_arm64 (Δ: 4156)
• rec_dis_5x41_minQ2=1_epic_craterlake_arm64 (Δ: 1) (new artifact) (ref artifact)
• rec_e_1GeV_20GeV_epic_craterlake_amd64 (Δ: 1) (new artifact) (ref artifact)
• rec_e_1GeV_20GeV_epic_craterlake_amd64_vs_arm64 (Δ: 3713)
• rec_e_1GeV_20GeV_epic_craterlake_arm64 (Δ: 1) (new artifact) (ref artifact)
• rec_pi_1GeV_20GeV_epic_craterlake_amd64 (Δ: 1) (new artifact) (ref artifact)
• rec_pi_1GeV_20GeV_epic_craterlake_amd64_vs_arm64 (Δ: 3420)
• rec_pi_1GeV_20GeV_epic_craterlake_arm64 (Δ: 1) (new artifact) (ref artifact)
• sim_dis_10x100_minQ2=1000_epic_craterlake_amd64 (Δ: 1) (new artifact) (ref artifact)
• sim_dis_10x100_minQ2=1_epic_craterlake_amd64 (Δ: 1) (new artifact) (ref artifact)
• sim_dis_18x275_minQ2=1000_epic_craterlake_amd64 (Δ: 1) (new artifact) (ref artifact)
• sim_dis_18x275_minQ2=1_epic_craterlake_amd64 (Δ: 1) (new artifact) (ref artifact)
• sim_dis_5x41_minQ2=1_epic_craterlake_amd64 (Δ: 1) (new artifact) (ref artifact)
• sim_dis_5x41_minQ2=1_epic_craterlake_amd64_vs_arm64 (Δ: 395)
• sim_dis_5x41_minQ2=1_epic_craterlake_arm64 (Δ: 1) (new artifact) (ref artifact)
• sim_e_1GeV_20GeV_epic_craterlake_amd64 (Δ: 1) (new artifact) (ref artifact)
• sim_e_1GeV_20GeV_epic_craterlake_amd64_vs_arm64 (Δ: 395)
• sim_e_1GeV_20GeV_epic_craterlake_arm64 (Δ: 1) (new artifact) (ref artifact)
• sim_pi_1GeV_20GeV_epic_craterlake_amd64 (Δ: 1) (new artifact) (ref artifact)
• sim_pi_1GeV_20GeV_epic_craterlake_amd64_vs_arm64 (Δ: 328)
• sim_pi_1GeV_20GeV_epic_craterlake_arm64 (Δ: 1) (new artifact) (ref artifact)
  ^{_{Last updated 2026-09-20T13:27-04:00 09a75b3}}

[veprbl]

Tested using singularity exec docker://ghcr.io/eic/eic_xl:unstable-mr-430-nightly eicrecon /dev/null

[Copilot]

Copilot review overview

🟢 Approval recommended

The wrapper correctly isolates positional parameters while preserving existing detector initialization behavior.

Review effort: Lite
Findings: None

What changed in this PR

Prevents container command arguments from being interpreted as detector configuration when sourcing thisepic.sh.

Changes:

• Adds a wrapper that clears positional arguments before sourcing.
• Uses the wrapper for automatic EPIC environment initialization.

File	Description
containers/​eic/​profile.d/​z21_epic_main.sh	Prevents $1 propagation into thisepic.sh.

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.

[wdconinc]

How does this change behavior of echo command | eic-shell or eic-shell -- command when args are present?

[veprbl]

How does this change behavior of echo command | eic-shell or eic-shell -- command when args are present?

Don't see a problem:

% echo ps | singularity exec docker://ghcr.io/eic/eic_xl:unstable-mr-430-nightly eic-shell sh
INFO:    Using cached SIF image
    PID TTY          TIME CMD
1064804 pts/10   00:00:00 starter
1064846 pts/10   00:00:00 bash
1064871 pts/10   00:00:00 squashfuse_ll
1064929 pts/10   00:00:00 bash
1064931 pts/10   00:00:00 ps