Add bitcoind to eget_packages and update installation command

[kenorb]

Summary by Sourcery

New Features:

• Add Bitcoin Core full-node installation through the eget package list, with configurable version and supported architecture selection.

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[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

The PR integrates Bitcoin Core's bitcoind into the eget package installation flow, using architecture-specific upstream archives and a configurable bitcoin_version variable, while enabling it in the example package configuration.

File-Level Changes

Change	Details	Files
Add Bitcoin Core bitcoind as an optional eget-managed package with architecture-aware downloads.	Define the bitcoind download URL using the configured Bitcoin Core version. Map supported eget architectures to Bitcoin Core archive names and extract only the bitcoind binary. Register bitcoind in the example eget_packages list.	.ansible/playbooks/tasks/eget.yml .ansible/variables-example.yml
Expose the Bitcoin Core version as a configurable Ansible variable.	Add bitcoin_version with a default example value of 31.1. Use the variable when constructing the bitcoind download URL, falling back to 31.1 when unset.	.ansible/playbooks/tasks/eget.yml .ansible/variables-example.yml

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[github-actions]

⛔ Workflow Failures Detected

The following job errors and annotations were found:

• Check / check / Link Checker at .github:126: Process completed with exit code 2.
• Check / check / Link Checker at .github:125: Summary report available at: https://github.com/kenorb/dotfiles/actions/runs/30289834085#summary-90056611669
• Check / check / Pre-commit at .github:96: Process completed with exit code 1.
• Check / check / Pre-commit at .ansible/variables-example.yml:174: Line too long (125 > 120 characters)
• Check / check / Pre-commit at .ansible/playbooks/tasks/eget.yml:118: Line too long (122 > 120 characters)
• Check / check / Pre-commit at .ansible/playbooks/tasks/eget.yml:109: Line too long (131 > 120 characters)
• Check / check / Pre-commit at .ansible/playbooks/tasks/eget.yml:88: Line too long (139 > 120 characters)
• Check / check / Pre-commit at .ansible/playbooks/tasks/eget.yml:118: 118:121 [line-length] line too long (122 > 120 characters)
• Check / check / Pre-commit at .ansible/playbooks/tasks/eget.yml:109: 109:121 [line-length] line too long (131 > 120 characters)
• Check / check / Pre-commit at .ansible/playbooks/tasks/eget.yml:88: 88:121 [line-length] line too long (139 > 120 characters)
• Check / check / Pre-commit at .ansible/variables-example.yml:174: 174:121 [line-length] line too long (125 > 120 characters)

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[sourcery-ai]

Hey - I've found 1 issue

Prompt for AI Agents

Please address the comments from this code review:

## Individual Comments

### Comment 1
<location path=".ansible/playbooks/tasks/eget.yml" line_range="89-92" />
<code_context>
+      bitcoind: >-
+        --file '*/bin/bitcoind' --to bitcoind
+        https://bitcoincore.org/bin/bitcoin-core-{{ bitcoin_version | default('31.1') }}/bitcoin-{{ bitcoin_version | default('31.1') }}-{{
+          'x86_64' if eget_arch == 'x86_64'
+          else 'aarch64' if eget_arch == 'arm64'
+          else 'arm'
+        }}-linux-gnu.tar.gz
       btop: "-a btop-{{ eget_plain_arch }}-unknown-linux-musl.tar.gz aristocratos/btop"
</code_context>
<issue_to_address>
**issue (bug_risk):** On 32-bit ARM hosts, the URL is built with the `arm-linux-gnu` suffix, but Bitcoin Core's ARM archive uses `arm-linux-gnueabihf.tar.gz`; `eget` therefore receives a nonexistent URL and bitcoind installation fails.

**Triggers:** When `ansible_facts['architecture']` contains `arm` but is not `x86_64` or `aarch64`.

**Suggested fix:** Map the 32-bit ARM case to `arm-linux-gnueabihf` rather than appending the generic `-linux-gnu` suffix.

```suggestion
          'x86_64-linux-gnu' if eget_arch == 'x86_64'
          else 'aarch64-linux-gnu' if eget_arch == 'arm64'
          else 'arm-linux-gnueabihf'
        }}.tar.gz
```
</issue_to_address>

Sourcery assessment

Needs a human reviewer. 1 finding to address first, and a merge can install and potentially run a new bitcoind binary from an external URL, and a bad version, archive, or architecture choice could leave behind software and downloaded node data after the configuration is reverted. The impact is bounded and repairable by removing the package/data or rerunning installation with the correct version.

Blocking findings: .ansible/playbooks/tasks/eget.yml:92

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[sourcery-ai]

issue (bug_risk): On 32-bit ARM hosts, the URL is built with the arm-linux-gnu suffix, but Bitcoin Core's ARM archive uses arm-linux-gnueabihf.tar.gz; eget therefore receives a nonexistent URL and bitcoind installation fails.

Triggers: When ansible_facts['architecture'] contains arm but is not x86_64 or aarch64.

Suggested fix: Map the 32-bit ARM case to arm-linux-gnueabihf rather than appending the generic -linux-gnu suffix.

Suggested change

	'x86_64' if eget_arch == 'x86_64'
	else 'aarch64' if eget_arch == 'arm64'
	else 'arm'
	}}-linux-gnu.tar.gz
	'x86_64-linux-gnu' if eget_arch == 'x86_64'
	else 'aarch64-linux-gnu' if eget_arch == 'arm64'
	else 'arm-linux-gnueabihf'
	}}.tar.gz