feat(dotfiles): add ability to provide an arbitrary user

dotfiles/main.tf

@@ -21,6 +21,13 @@ variable "dotfiles_uri" {
   default = null
 }
 
+variable "user" {
+  type        = string
+  description = "The name of the user to apply the dotfiles to. (optional, applies to the current user by default)"
+
+  default = null
+}
+
 data "coder_parameter" "dotfiles_uri" {
   count = var.dotfiles_uri == null ? 1 : 0
 
@@ -35,12 +42,14 @@ data "coder_parameter" "dotfiles_uri" {
 
 locals {
   dotfiles_uri = var.dotfiles_uri != null ? var.dotfiles_uri : data.coder_parameter.dotfiles_uri[0].value
+  user         = var.user != null ? var.user : ""
 }
 
 resource "coder_script" "personalize" {
   agent_id = var.agent_id
   script = templatefile("${path.module}/run.sh", {
     DOTFILES_URI : local.dotfiles_uri,
+    DOTFILES_USER : local.user
   })
   display_name = "Dotfiles"
   icon         = "/icon/dotfiles.svg"

dotfiles/run.sh

@@ -1,6 +1,21 @@
+#!/usr/bin/env bash
 DOTFILES_URI="${DOTFILES_URI}"
+DOTFILES_USER="${DOTFILES_USER}"
 
 if [ -n "$${DOTFILES_URI// }" ]; then
-  echo "✨ Applying dotfiles for user $USER"
+  if [ -z "$DOTFILES_USER" ]; then
+    DOTFILES_USER="$USER"
+  fi
+
+  echo "✨ Applying dotfiles for user $DOTFILES_USER"
+
+  if [ "$DOTFILES_USER" = "$USER" ]; then
     coder dotfiles "$DOTFILES_URI" -y 2>&1 | tee -a ~/.dotfiles.log
+  else
+    # The "eval echo ~$USER" part is used to dynamically get the home directory of the user, see https://superuser.com/a/484280
+    # sudo -u coder sh -c 'eval echo ~$USER' -> "/home/coder"                                                                                               ~/projects/coder-modules
+    # sudo sh -c 'eval echo ~$USER'          -> "/root"
+
+    sudo -u "$DOTFILES_USER" sh -c "$(which coder) dotfiles \"$DOTFILES_URI\" -y 2>&1 | tee -a $(eval echo ~$USER)/.dotfiles.log"
+  fi
 fi