Running Java in Codex Web | Ex falso sequitur quodlibet

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This article was translated by GPT-5.4. The original is here.

When I had Codex Web work on a Java (Gradle) repository, the build failed. I figured out how to fix it, so I am leaving a note here.

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The solution was posted on the OpenAI Developer Community forum.

Issue with Running Java Maven Tests in Codex - Dependency Resolution Failure - Codex / Codex CLI - OpenAI Developer Community

Open Codex environment settings and select the environment you use for Java repository development. Click "Edit" and paste the following script into "Setup script."

1#!/usr/bin/env bash
2set -euxo pipefail     # fail hard, fail fast, print everything
3
4# 1. System update & required packages
5apt-get update -qq
6apt-get install -yqq maven
7
8# 2. Verify the install (good for debugging)
9mvn   -v
10
11# 3. Configure Maven to use the Codex proxy
12mkdir -p ~/.m2
13cat > ~/.m2/settings.xml <<'EOF'
14<settings>
15  <proxies>
16    <proxy>
17      <id>codexProxy</id>
18      <active>true</active>
19      <protocol>http</protocol>
20      <host>proxy</host>
21      <port>8080</port>
22    </proxy>
23  </proxies>
24</settings>
25EOF

I removed step 4 from the referenced post. If I left it in, it caused an error instead. With this, I can now do Java development from Codex Web 🎉

##Settings

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