fix(coder/modules/dotfiles): allow tilde in DOTFILES_URI shell validation (#904)

Fixes https://github.com/coder/registry/issues/762

## Problem

The shell-side URI validation regex in `run.sh` did not include `~` in
the allowed character set. URLs containing tilde paths (common in
Bitbucket Server personal repositories, e.g.
`ssh://git@bitbucket.example.org:7999/~user/repo.git`) were rejected at
runtime with `ERROR: DOTFILES_URI contains invalid characters`.

The Terraform-side validations in `main.tf` already allowed `~`, so the
inconsistency only surfaced when the script actually ran in a workspace.

## Changes

- **`run.sh`**: Added `~` to the character class in the shell validation
regex, making it consistent with the three Terraform regex patterns in
`main.tf`.
- **`main.test.ts`**: The "accepts valid git URL formats" test now also
executes the rendered shell script and asserts that the shell-side
validation does not reject any of the valid URLs. This closes the
coverage gap that let the Terraform/shell inconsistency go undetected.

> 🤖 Generated by Coder Agents

---------

Authored-by: Jay Kumar <jay.kumar@coder.com>

registry/coder/modules/dotfiles/README.md

@@ -18,7 +18,7 @@ Under the hood, this module uses the [coder dotfiles](https://coder.com/docs/v2/
 module "dotfiles" {
   count    = data.coder_workspace.me.start_count
   source   = "registry.coder.com/coder/dotfiles/coder"
-  version  = "1.4.1"
+  version  = "1.4.2"
   agent_id = coder_agent.example.id
 }
 ```
@@ -31,7 +31,7 @@ module "dotfiles" {
 module "dotfiles" {
   count    = data.coder_workspace.me.start_count
   source   = "registry.coder.com/coder/dotfiles/coder"
-  version  = "1.4.1"
+  version  = "1.4.2"
   agent_id = coder_agent.example.id
 }
 ```
@@ -42,7 +42,7 @@ module "dotfiles" {
 module "dotfiles" {
   count    = data.coder_workspace.me.start_count
   source   = "registry.coder.com/coder/dotfiles/coder"
-  version  = "1.4.1"
+  version  = "1.4.2"
   agent_id = coder_agent.example.id
   user     = "root"
 }
@@ -54,14 +54,14 @@ module "dotfiles" {
 module "dotfiles" {
   count    = data.coder_workspace.me.start_count
   source   = "registry.coder.com/coder/dotfiles/coder"
-  version  = "1.4.1"
+  version  = "1.4.2"
   agent_id = coder_agent.example.id
 }
 
 module "dotfiles-root" {
   count        = data.coder_workspace.me.start_count
   source       = "registry.coder.com/coder/dotfiles/coder"
-  version      = "1.4.1"
+  version      = "1.4.2"
   agent_id     = coder_agent.example.id
   user         = "root"
   dotfiles_uri = module.dotfiles.dotfiles_uri
@@ -90,7 +90,7 @@ You can set a default dotfiles repository for all users by setting the `default_
 module "dotfiles" {
   count                = data.coder_workspace.me.start_count
   source               = "registry.coder.com/coder/dotfiles/coder"
-  version              = "1.4.1"
+  version              = "1.4.2"
   agent_id             = coder_agent.example.id
   default_dotfiles_uri = "https://github.com/coder/dotfiles"
 }

registry/coder/modules/dotfiles/main.test.ts

@@ -1,9 +1,11 @@
 import { describe, expect, it } from "bun:test";
 import {
+  findResourceInstance,
   runTerraformApply,
   runTerraformInit,
   testRequiredVariables,
 } from "~test";
+import { readableStreamToText, spawn } from "bun";
 
 describe("dotfiles", async () => {
   await runTerraformInit(import.meta.dir);
@@ -34,6 +36,24 @@ describe("dotfiles", async () => {
         dotfiles_uri: url,
       });
       expect(state.outputs.dotfiles_uri.value).toBe(url);
+
+      // Run the rendered shell script to verify the shell-side URI
+      // validation also accepts the URL. The script will fail later
+      // (no coder binary available), but it must not fail at the
+      // URI validation step.
+      const instance = findResourceInstance(state, "coder_script");
+      const proc = spawn(["bash", "-c", instance.script], {
+        stdout: "pipe",
+        stderr: "pipe",
+      });
+      const stderr = await readableStreamToText(proc.stderr);
+      await proc.exited;
+      expect(stderr).not.toContain(
+        "ERROR: DOTFILES_URI contains invalid characters",
+      );
+      expect(stderr).not.toContain(
+        "ERROR: DOTFILES_URI must be a valid repository URL",
+      );
     }
   });
 

registry/coder/modules/dotfiles/run.sh

@@ -9,7 +9,7 @@ DOTFILES_BRANCH="${DOTFILES_BRANCH}"
 # Validate DOTFILES_URI to prevent command injection (defense in depth)
 if [ -n "$DOTFILES_URI" ]; then
   # shellcheck disable=SC2250
-  if [[ "$DOTFILES_URI" =~ [^a-zA-Z0-9._/:@-] ]]; then
+  if [[ "$DOTFILES_URI" =~ [^a-zA-Z0-9._/:@~-] ]]; then
     echo "ERROR: DOTFILES_URI contains invalid characters" >&2
     exit 1
   fi