Add create_from_github(); add figures

usage-new-project-github-first.Rmd

@@ -63,6 +63,53 @@ Make sure you remove the `git clone ...` that shows up at the beginning.
 
 ## New RStudio Project via git clone {#new-rstudio-project-via-git}
 
+```{r new-project-github-first, echo = FALSE, out.width = "100%", fig.cap = "Clone a remote repo."}
+knitr::include_graphics("img/new-project-github-first.jpeg")
+```
+
+I present two ways to do this:
+
+* `usethis::create_from_github()`
+* Via the RStudio IDE
+
+*(Recall that we showed how to do this with command line Git in chapter \@ref(push-pull-github).)*
+
+When you are cloning your own GitHub repository, the two methods are equivalent.
+In other scenarios, especially fork-and-clone (chapter \@ref(fork-and-clone)), I think `usethis::create_from_github()` is superior, because it does additional, recommended setup.
+
+Pick **one** of these methods below.
+
+### `usethis::create_from_github()`
+
+You can execute these commands in any R session.
+If you use RStudio, then do this in the R console of any RStudio instance.
+
+```{r eval = FALSE}
+usethis::create_from_github(
+  "https://github.com/YOU/YOUR_REPO.git",
+  destdir = "~/path/to/where/you/want/the/local/repo/"
+)
+```
+
+The first argument is `repo_spec` and it accepts the GitHub repo specification in various forms.
+In particular, you can paste the URL we just copied from GitHub.
+
+The `destdir` argument specifies the parent directory where you want the new folder (and local Git repo) to live.
+If you don't specify `destdir`, usethis defaults to some very conspicuous place, like your desktop.
+If you like to keep Git repos in a certain folder on your computer, you can personalize this default by setting the `usethis.destdir` option in your `.Rprofile`.
+
+We're accepting the default behaviour of two other arguments, `rstudio` and `open`, because that's what most people will want.
+For example, for an RStudio user, `create_from_github()` does this:
+
+  * Creates a new local directory in `destdir`, which is all of these things:
+    - a directory or folder on your computer
+    - a Git repository, linked to a remote GitHub repository
+    - an RStudio Project
+  * Opens a new RStudio instance in the new Project
+  * **In the absence of other constraints, I suggest that all of your R projects have exactly this set-up.**
+
+### RStudio IDE
+
 In RStudio, start a new Project:
 
   * *File > New Project > Version Control > Git*. In the "repository URL" paste the URL of your new GitHub repository. It will be something like this `https://github.com/jennybc/myrepo.git`.
@@ -74,14 +121,24 @@ In RStudio, start a new Project:
     - an RStudio Project
   * **In the absence of other constraints, I suggest that all of your R projects have exactly this set-up.**
 
-This should download the `README.md` file that we created on GitHub in the previous step.
+### Have a look around
+
+Regardless of whether you used usethis or RStudio, you should now be working in the new Git repo.
+The implicit `git clone` should download the `README.md` file that we created on GitHub in the previous step.
 Look in RStudio's file browser pane for the `README.md` file.
 
 There's a big advantage to the "GitHub first, then RStudio" workflow: the remote GitHub repo is configured as the `origin` remote for your local repo and your local `main` branch is now tracking the `main` on GitHub.
 This is a technical but important point about Git.
 The practical implication is that you are now set up to push and pull.
 No need to fanny around setting up Git remotes and tracking branches on the command line.
 
+We're about to confirm we are setup for pulling and pushing.
+
+```{r github-pull-push, echo = FALSE, out.width = "100%", fig.cap = "Pull and push."}
+knitr::include_graphics("img/github-pull-push.jpeg")
+```
+
+
 ### Optional: peek under the hood
 
 Completely optional activity: use command line Git to see what we're talking about above, i.e. the remote and tracking branch setup.