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Nick Vigilante e458692cb8 refactor(docs): convert absolute coder/coder blob/tree/main links to relative (DOCS-351) (#26341 )

Closes [DOCS-351](https://linear.app/codercom/issue/DOCS-351).

> [!WARNING]
> **DO NOT MERGE** until
[DOCS-349](https://linear.app/codercom/issue/DOCS-349)
([coder.com#877](https://github.com/coder/coder.com/pull/877)) has
shipped to production and baked for at least one Vercel cycle.
>
> Without DOCS-349, the relative links in this PR resolve to broken
docs-route URLs (`/docs/helm/coder/values.yaml` -> 404) instead of
GitHub URLs tagged with the displayed docs version. DOCS-349 fixes the
rewriter to classify these as GitHub blob/tree URLs with the page's
resolved ref.

## TL;DR

Converts 121 absolute
`https://github.com/coder/coder/(blob|tree)/main/<path>` links across 39
docs markdown files to relative paths. After this lands AND DOCS-349
deploys, every one of these links will follow the displayed docs version
(mainline tag on bare URLs, explicit tag on `/@vX.Y.Z/`, `main` on
`/@main/`) instead of always pointing to `main`.

## Why

Today a reader on `/docs/@v2.30.0/install/docker` follows a
`compose.yaml` link and arrives at `main`'s `compose.yaml`, which
doesn't necessarily match what the docs page describes. Helm values,
Terraform templates, and source-code references in particular drift
across versions. The fix is to let the coder.com rewriter substitute the
page's resolved ref into the URL; that only works on relative links.

## Example payoff (post-DOCS-349)

| URL | Today (absolute, always `main`) | After (relative + rewriter) |
|---|---|---|
| `/docs/install/docker` |
`https://github.com/coder/coder/blob/main/compose.yaml` |
`https://github.com/coder/coder/blob/v2.34.1/compose.yaml` (today's
mainline) |
| `/docs/@v2.30.0/install/docker` | same as above |
`https://github.com/coder/coder/blob/v2.30.0/compose.yaml` |
| `/docs/@main/install/docker` | same as above |
`https://github.com/coder/coder/blob/main/compose.yaml` |

## Scope

- **121 conversions** across **39 files**.
- Verb breakdown: `tree/main` (directories) and `blob/main` (files),
both flipped to relative paths.
- Line anchors (`#L23-L24`) and query strings preserved verbatim.
- Conversion is mechanical: relative path computed from the doc file's
directory to the target via `os.path.relpath`. Any path starting at the
same directory or below gets a `./` prefix; otherwise `../` chains.

## Rebased on main

The branch was rebased onto `main` after the DOCS-350 hotfix
([#26339](https://github.com/coder/coder/pull/26339)) merged. The hotfix
repointed 3 `docs-backend-contrib-guide` refs in `backend.md` to `main`,
which then needed the same `main` -> relative conversion this PR is
doing for the other 121 links. The conflict was resolved by reapplying
the mechanical conversion to `backend.md` after taking the hotfix's
content. Net result: those 3 links land here as relative, same as
everything else. New HEAD `3f501cb622`.

## Inline fix folded in: dead `nix` link

- `docs/about/contributing/CONTRIBUTING.md:7` -> `../../../nix`

The original absolute URL `https://github.com/coder/coder/tree/main/nix`
already returned 404 today. Repointed to `flake.nix` (modern Nix
entrypoint, what the prose "Nix environment" semantically refers to).
Closes [DOCS-357](https://linear.app/codercom/issue/DOCS-357) here since
the `check-docs` Linkspector job surfaced it during rebase; cheaper to
fix inline than in a separate single-line PR.

## Out of scope (filed separately)

- [DOCS-350](https://linear.app/codercom/issue/DOCS-350): 3 dead
`docs-backend-contrib-guide` branch refs in `backend.md`
([#26339](https://github.com/coder/coder/pull/26339), merged).
- [DOCS-352](https://linear.app/codercom/issue/DOCS-352): 10 SHA-pinned
`(blob|tree)/<sha>` links pending intent review.
- [DOCS-355](https://linear.app/codercom/issue/DOCS-355): code-server
analog (4 absolute `(blob|tree)/main` links in `coder/code-server`).
- [DOCS-356](https://linear.app/codercom/issue/DOCS-356): 2 upstream
content bugs in `coder/code-server/docs/CONTRIBUTING.md` (independent of
this PR).


## Not triggering `/coder-agents-review`

Docs-only edit; per `AGENTS.md` the bot review is reserved for
product/CI changes.

## Pre-mortem

| Concern | Mitigation |
|---|---|
| Merging before DOCS-349 deploys regresses ~120 currently-working links
into 404s on coder.com | Clear DO-NOT-MERGE banner; tracked as blocker
in Linear. |
| Relative path computed incorrectly (off-by-one `..`) | Verified all
114 newly-relative non-md/non-image paths resolve to existing files in
the repo (only exception is the pre-existing dead `nix` link above). |
| Line anchors stripped during conversion | Preserved by the
substitution regex; verified `#L<n>-L<m>` cases in `airgap.md` and
`speed-up-templates.md`. |
| Future code reorgs change file locations | Relative links will start
pointing to nothing. Same failure mode as absolute links pointing to
renamed files; can be caught with a future link-checker job. |

## Validation

```
$ grep -rE 'github\.com/coder/coder/(blob|tree)/main' docs --include="*.md" | wc -l
0
$ git diff --stat origin/main | tail -1
39 files changed, 118 insertions(+), 118 deletions(-)
```

114 newly-relative paths verified to resolve to existing repo files
(Python `os.path.exists` check on each computed target).

<details>
<summary>Decision log + planning context</summary>

**Why relative over `(blob|tree)/{{currentDocsVersion}}/...`
templating**: relative paths require zero markdown-system support and
zero upstream churn beyond this one PR. Templating would require a
preprocessor on `coder.com` side AND a convention upstream authors have
to remember; relative paths just work in a plain editor and
`github.com`'s own renderer too.

**Why `./` prefix on same-directory targets**: makes the conversion
grep-able later (`grep -E '\((\.\./|\./)'`).

**Why preserve `#L<n>-L<m>` anchors verbatim**: the anchor is meaningful
to the linked file's content, not to the URL form; keeping it as-is
preserves authorial intent. If the file later changes such that the line
range drifts, that's a different problem the SHA-pin audit
([DOCS-352](https://linear.app/codercom/issue/DOCS-352)) will surface.

</details>

---

*Generated by Coder Agents on @nickvigilante's behalf.*





## Drive-by external link fix folded in

`docs/about/contributing/CONTRIBUTING.md:296` cited
`https://reflectoring.io/meaningful-commit-messages/` which is returning
HTTP 503 (the host appears to be down site-wide right now). `check-docs`
Linkspector flagged it after the rebase. Replaced with
`https://cbea.ms/git-commit/` (Chris Beams' canonical "If applied, this
commit will..." article, confirmed 200), which is the original source of
the rule the prose recites anyway.

2026-06-22 11:39:12 -04:00

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Google Cloud Platform

In this guide, you will learn how to deploy the Coder control plane instance and your first template.

Requirements

This guide assumes you have roles/compute.instanceAdmin.v1 access to your Google Cloud Platform project.

Launch a Coder instance from the Google Cloud Marketplace

We publish an Ubuntu 22.04 VM image with Coder and Docker pre-installed.

Two SKU's are available via the Google Cloud Marketplace:

Be sure to keep the default firewall options checked so you can connect over HTTP, HTTPS, and SSH.

We recommend keeping the default instance type (e2-standard-4, 4 cores and 16 GB memory) if you plan on provisioning Docker containers as workspaces on this VM instance. Keep in mind this platforms is intended for proof-of-concept deployments and you should adjust your infrastructure when preparing for production use. See: Scaling Coder

Be sure to add a keypair so that you can connect over SSH to further configure Coder.

After launching the instance, wait 30 seconds and navigate to the public IPv4 address. You should be redirected to a public tunnel URL.

That's all! Use the UI to create your first user, template, and workspace. We recommend starting with a Docker template since the instance has Docker pre-installed.

Configuring Coder server

Coder is primarily configured by server-side flags and environment variables. Given you created or added key-pairs when launching the instance, you can configure your Coder deployment by logging in via SSH or using the console:

ssh ubuntu@<gcp-public-IPv4>
sudo vim /etc/coder.d/coder.env # edit config
sudo systemctl daemon-reload
sudo systemctl restart coder # restart Coder

Give developers VM workspaces (optional)

Instead of running containers on the Coder instance, you can offer developers full VM instances with the gcp-linux template.

Before you can use this template, you must authorize Coder to create VM instances in your GCP project. Follow the instructions in the gcp-linux template README to set up authentication.

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