Update docs and scripts for installation from COPR

[pmtk]

Closes #195

Summary by CodeRabbit

• New Features

  • Support for installing nightly MicroShift RPMs from COPR and a configurable RPM source selection.

• Documentation

  • Quick Start and install docs updated with COPR nightly link, explicit nightly installation examples, and preserved non-nightly instructions.
  • Clarified that either microshift-kindnet or microshift-networking is required for networking.

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[coderabbitai]

📝 Walkthrough

Walkthrough

Adds COPR/nightly RPM installation support: new RPM_SOURCE and COPR_REPO env vars, refactors quickrpm.sh to fetch helper scripts and branch install flows (github vs copr-nightly), and extends repo creation tooling with create_rhocp_repo and create_local_microshift_repo; updates docs to document COPR/nightly installs and networking requirements. (49 words)

Changes

Cohort / File(s)	Summary
Documentation README.md, docs/run.md	Add COPR nightly link and explicit example for RPM_SOURCE=copr-nightly; replace prior local/releases RPM install flow in docs with COPR-based nightly workflow; note that microshift-kindnet/microshift-networking are mandatory.
Installer script src/quickrpm.sh	Introduce public env vars RPM_SOURCE (default github) and COPR_REPO; add download_script(), install_microshift_packages(), install_rpms_copr(), install_rpms(); conditional tag resolution and case-based install flow for github vs copr-nightly.
Repo creation src/rpm/create_repos.sh	Add create_rhocp_repo() and create_local_microshift_repo(); parameterize repo file naming via variables; add -rhocp-mirror option and refactor create/delete flows to preserve COPR/RHOC P repo handling.

Sequence Diagram

sequenceDiagram
    participant User as User
    participant Quick as quickrpm.sh
    participant Downloader as download_script()
    participant Repos as create_repos.sh
    participant COPR as COPR
    participant DNF as dnf

    User->>Quick: RPM_SOURCE=copr-nightly ./quickrpm.sh
    Quick->>Downloader: fetch create_repos.sh
    Downloader-->>Quick: provide create_repos.sh
    Quick->>Downloader: fetch postinstall.sh
    Downloader-->>Quick: provide postinstall.sh
    Quick->>Repos: request enable COPR / create RHOC P mirror (-rhocp-mirror)
    Repos->>COPR: query nightly repo/version metadata
    COPR-->>Repos: return metadata
    Repos-->>Quick: repo files created
    Quick->>DNF: install microshift packages from COPR
    DNF-->>Quick: install results
    Quick->>Quick: run postinstall.sh / start service

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Estimated code review effort

🎯 4 (Complex) | ⏱️ ~60 minutes

Possibly related PRs

• Implement a quick rpm install procedure #137: Directly related — modifies src/quickrpm.sh and src/rpm/create_repos.sh and provides the quick-rpm install groundwork this change extends.

Suggested reviewers

• ggiguash

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 10.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	Title clearly and concisely summarizes the main change: updating documentation and scripts to support COPR-based installation.
Linked Issues check	✅ Passed	PR addresses issue #195 by documenting COPR installation workflow with dependency handling via RHOCP mirror and COPR-specific installation steps.
Out of Scope Changes check	✅ Passed	All changes directly support COPR installation: documentation updates, script refactoring for RPM source selection, and repository management functions.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In `@src/quickrpm.sh`:
- Line 79: Fix the typo in the comment: replace the misspelled word "greeboot"
with "greenboot" in src/quickrpm.sh (the comment line containing "# Fedora
doesn't have old packages - downgrading greeboot is not possible."). Ensure the
corrected comment reads "# Fedora doesn't have old packages - downgrading
greenboot is not possible." so it's clear and accurate.

[coderabbitai]

Actionable comments posted: 2

🤖 Fix all issues with AI agents

In `@README.md`:
- Around line 53-57: The README's installation snippet uses "sudo
RPM_SOURCE=copr-nightly bash" which can lose the RPM_SOURCE env var under sudo;
update the command in the README to use "sudo env RPM_SOURCE=copr-nightly bash"
so the RPM_SOURCE is preserved when invoking the quickrpm.sh script (update the
code block that currently contains "curl -s
https://microshift-io.github.io/microshift/quickrpm.sh | sudo
RPM_SOURCE=copr-nightly bash" to the env-preserving form).

In `@src/quickrpm.sh`:
- Around line 62-78: The download_script function uses an undefined variable
scriptdir when copying the local RPM script which breaks under set -u; update
the local-copy cp invocation to use the already-defined curscriptdir (i.e.,
replace "${scriptdir}/../${scriptpath}" with "${curscriptdir}/../${scriptpath}")
so the local path check and copy succeed.

[coderabbitai]

Actionable comments posted: 1

🧹 Nitpick comments (1)

src/rpm/create_repos.sh (1)

74-81: Consider preserving stderr for debugging failed queries.

Redirecting stderr to /dev/null on line 75 hides potential dnf errors that could help diagnose why version detection fails.

♻️ Suggested improvement

--rhocp-mirror)
-    repo_version=$(dnf repoquery --qf '%{VERSION}' --latest-limit=1 microshift 2>/dev/null | cut -d. -f1,2)
+    repo_version=$(dnf repoquery --qf '%{VERSION}' --latest-limit=1 microshift | cut -d. -f1,2)
     if [ -z "${repo_version}" ] ; then
         echo "ERROR: Failed to find version of MicroShift available in the repositories"
         usage