Rust CLI Troubleshooting: CI, Environment, Build Scripts, and Publishing

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Commands for debugging CI failures, environment mismatches, build script output, installation problems, and publish checks in Rust CLI projects.

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## CI and environment debugging

Build with the lockfile enforced

↗#

cargo build --locked

# Refuse dependency resolution changes during CI.

Test with the lockfile enforced

↗#

cargo test --locked

# Run tests without silently changing dependencies.

Build with frozen metadata

↗#

cargo build --frozen

# Disallow network access and lockfile changes.

Inspect Cargo configuration

↗#

cargo config get

# Read resolved configuration values when available.

Print Rust-related environment variables

↗#

env | sort | grep -E '^(CARGO|RUST|CC|AR|PKG_CONFIG)'

# Inspect environment configuration in shells or CI jobs.

## Build scripts, install, and publish checks

Inspect build-script output clearly

↗#

cargo build -vv

# Use very verbose mode to surface build-script details.

Minimal build.rs rerun rule

↗#

fn main() {
    println!("cargo::rerun-if-changed=src/schema.sql");
}

# Prevent unnecessary build-script reruns.

Install the current CLI crate locally

↗#

cargo install --path .

# Compile and install from the current path.

Reinstall a local CLI forcefully

↗#

cargo install --path . --force

# Overwrite an existing installed binary.

See what would be packaged

↗#

cargo package --list

# Preview which files Cargo will include.

Validate publishing without uploading

↗#

cargo publish --dry-run

# Run Cargo’s publish checks as a dry run.

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