Summary:
In addition to the obvious benefit of having a favicon, this gets rid of
a 404 Not Found error on our home page, tremendously boosting our hacker
cred.
Test Plan:
The favicon is displayed in both `yarn start` and the static site (as a
result of the build script). The added build test fails before this
change.
wchargin-branch: add-favicon
Summary:
This is a follow-up to #514, wherein we disabled new service workers and
instructed any existing service workers to self-destruct. (See that PR
for the rationale.) This commit removes them from our codebase entirely,
enabling us to slim down our build process and our build output.
Test Plan:
Running `yarn start` still works. Building the static site and exploring
it works, too.
wchargin-branch: remove-sw
Summary:
We plan to allow plugins to store permanent data in `$SC/data/` and
temporary, ephemeral, or intermediate data in `$SC/cache/`. The latter
subtree will be excluded from the static site at build time, so it
behooves us to also exclude it from the development environment.
Test Plan:
Run `yarn start`. Then,
```shell
$ root='localhost:8080/api/v1/data'
$ curl -sI "${root}/repositoryRegistry.json" | head -1
HTTP/1.1 200 OK
$ curl -sI "${root}/data/sourcecred/example-git/github/view.json" | head -1
HTTP/1.1 200 OK
$ curl -sI "${root}/cache" | head -1
HTTP/1.1 400 Bad Request
$ curl -sI "${root}/cache/" | head -1
HTTP/1.1 400 Bad Request
$ curl -sI "${root}/cache/foo" | head -1
HTTP/1.1 400 Bad Request
$ curl -sI "${root}/cache/foo/bar/baz" | head -1
HTTP/1.1 400 Bad Request
```
Also, check that the app still works.
wchargin-branch: exclude-cache-from-dev-server
Summary:
We never use the `node ./bin/sourcecred.js start` command. This command
contains an Express server to combine the static files with the build
output, which duplicates the logic in our Webpack config, which we
actually use (with `yarn start`). Once we actually want the command line
entry point to be a useful tool for end users, we can consider
reimplementing it the right way, whatever that may be. Until then, it’s
simply one more thing to keep in sync.
Test Plan:
Running `yarn test --full` passes; the `load` CLI command still works;
running `yarn start` still works.
wchargin-branch: remove-start
Summary:
We will shortly want to perform testing of shell scripts; it makes the
most sense to do so via the shell. We could roll our own testing
framework, but it makes more sense to use an existing one. By choosing
Sharness, we’re in good company: `go-ipfs` and `go-multihash` use it as
well, and it’s derived from Git’s testing library. I like it a lot.
For now, we need a dummy test file; our test runner will fail if there
are no tests to run. As soon as we have a real test, we can remove this.
This commit was generated by following the “per-project installation”
instructions at https://github.com/chriscool/sharness, and by
additionally including that repository’s `COPYING` file as
`SHARNESS_LICENSE`, with a header prepended. I considered instead adding
Sharness as a submodule, which is supported and has clear advantages
(e.g., you can update the thing), but opted to avoid the complexity of
submodules for now.
Test Plan:
Create the following tests in the `sharness` directory:
```shell
$ cat sharness/good.t
#!/bin/sh
test_description='demo of passing tests'
. ./sharness.sh
test_expect_success "look at me go" true
test_expect_success EXPENSIVE "this may take a while" 'sleep 2'
test_done
# vim: ft=sh
$ cat sharness/bad.t
#!/bin/sh
test_description='demo of failing tests'
. ./sharness.sh
test_expect_success "I don't feel so good" false
test_done
# vim: ft=sh
```
Note that `yarn sharness` and `yarn test` fail appropriately. Note that
`yarn sharness-full` fails appropriately after taking two extra seconds,
and `yarn test --full` runs the latter. Each failure message should
print the name of the failing test case, not just the suite name, and
should indicate that the passing tests passed.
Then, remove `sharness/bad.t`, and note that the above commands all
pass, with the `--full` variants still taking longer.
Finally, remove `sharness/good.t`, and note that the above commands all
pass (and all pass quickly).
wchargin-branch: add-sharness
Summary:
This subtree has no effect on the new build process; it contains only
stale code.
Test Plan:
Running `yarn test --full` passes. Running `yarn build` and running an
HTTP server on the result indicates the expected behavior, as does
running `yarn start`. A quick `git grep public` finds no amok results.
wchargin-branch: remove-public
Summary:
We were asking the `clean-webpack-plugin` to remove the `build/`
directory in all cases. However, Webpack accepts a command-line
parameter `--output-path`. When such a parameter is passed, we would be
removing the wrong directory.
The proper behavior is to remove “whatever the actual output path is”.
Webpack exposes this information, but it appears that the
`clean-webpack-plugin` does not take advantage of it. Therefore, this
commit includes a small Webpack plugin to do the right thing.
Test Plan:
Test that the behavior is correct when no output directory is specified:
```
mkdir -p build && touch build/wat && yarn build && ! [ -e build/wat ]
```
Test that the behavior is correct with an explicit `--output-path`:
```
outdir="$(mktemp -d)" && touch "${outdir}/wat" && \
yarn build --output-path "${outdir}" && \
! [ -e "${outdir}/wat" ]
```
Test that the plugin refuses to remove the root directory:
```
! yarn build --output-path . && \
sed -i '/path: /d' config/makeWebpackConfig.js && ! yarn build
```
(Feel free to comment out the actual `rimraf.sync` line in the plugin
when testing this.)
wchargin-branch: clean-actual-build-directory
Summary:
Running `yarn test` (equiv. `npm test` or `npm run test`) now runs all
checks. It takes the place of the former `yarn travis`. This is more in
line with the expectation of a top-level `test` command: if it passes,
your code is good.
The `unit` command now runs Jest once, not in watch mode. It takes the
place of the former `ci-test`. To run tests in watch mode, run any of
the following:
- `yarn unit --watch`, or
- `npm run unit -- --watch`, or
- `npm unit -- --watch`.
This behavior is more consistent with the standard behavior of commands
like `make test`. It is also empirically what @wchargin and
@decentralion want most of the time.
Test Plan:
Verify that each of the scripts `test`, `unit`, and `coverage` passes.
Verify that each of the aforementioned `--watch` invocations works.
Verify that `.travis.yml` has the correct `script:` command.
wchargin-branch: reorganize-test-command
Summary:
In our current system, we build by invoking `scripts/build.js`, which
begins by removing the `build/` directory. This behavior is nice,
because it prevents cross-contamination between builds. In this commit,
we add a plugin to achieve the same result from directly within Webpack.
Test Plan:
Run
```
mkdir -p ./build
touch ./build/wat
NODE_ENV=production node ./node_modules/.bin/webpack \
--config config/makeWebpackConfig.js
```
and ensure that `./build/wat` does not exist after the build completes.
wchargin-branch: webpack-clean-build
Summary:
This commit makes the Webpack dev server fully functional under the new
config, by serving the static SourceCred directory via a piece of
injected middleware.
Test Plan:
Run
```
NODE_ENV=development node ./node_modules/.bin/webpack-dev-server \
--config config/makeWebpackConfig.js
```
and navigate to the cred explorer. Note that the repository registry is
fetched, and the whole cred explorer works.
wchargin-branch: webpack-statics
Summary:
Extraction of the plugin list to a function is mostly trivial, but
requires a novel `// $ExpectFlowError`. The error has been there the
whole time, but Flow only catches it now. Why? Who knows.
Test Plan:
Run
```
NODE_ENV=development node ./node_modules/.bin/webpack-dev-server \
--config config/makeWebpackConfig.js
```
Note that the compilation/recompilation time is much faster than
previously.
wchargin-branch: webpack-minify-prod-only
Summary:
In addition to simply disabling the prod-only check, we apply a
workaround for a known bug that breaks static site generation in Webpack
versions >= 2.0.
Test Plan:
Run
```
NODE_ENV=development node ./node_modules/.bin/webpack-dev-server \
--config config/makeWebpackConfig.js
```
and visit http://localhost:8080/webpack-dev-server/ (note the trailing
slash) or just http://localhost:8080/. Expect the server to be slow, as
it is actually building for production.
wchargin-branch: webpack-enable-dev
Summary:
This will enable us to differentiate the production and development
behavior where necessary (primarily, only running minification in prod).
Best reviewed with `git show -w`.
Test Plan:
The diff with `git show -w` and the fact that `yarn flow` passes should
be sufficient. If you really want to be thorough, run Webpack with this
config file and `NODE_ENV` set to `production`.
wchargin-branch: webpack-functionize
Summary:
There really should be an `// $ExpectFlowError` on the dynamic `require`
on line 182:
```js
paths: require(paths.appRouteData).routeData.map(({path}) => path),
```
However, for some reason Flow does not catch this error now, so adding a
suppression comment generates an “unused suppression” warning. We
therefore omit the suppression in this commit; we will add it later,
once Flow magically finds the error.
Test Plan:
`yarn flow` reports no errors; a deliberately introduced error is
properly caught.
wchargin-branch: webpack-flow
Summary:
This module will become the shared home of the production and
development configurations.
Test Plan:
Run:
```
rm -r build/
NODE_ENV=production node node_modules/.bin/webpack \
--config config/makeWebpackConfig.js
(cd build && python -m SimpleHTTPServer)
```
and load http://localhost:8000. Note that the main content of app still
works, although the static assets in the SourceCred directory are not
loaded so the useful functionality is crippled.
wchargin-branch: webpack-init
Also add config/jest/setupJest.js so we can configure jest-fetch-mock
Test plan: I have verified that mocked fetch works as expected in a
downstream commit.
Summary:
This removes the hard-coded route data from the Webpack config,
replacing it with the list of paths exported by the route data module.
Test Plan:
Note that the output of `yarn build` is identical before and after this
change: namely,
```shell
$ find build -exec shasum -a 256 {} + | shasum -a 256
7610a61f8a977f1d8edd849fc81256ca15f41f366e5fdb4b59a5d5ce37d6d58e
```
wchargin-branch: non-hard-coded-route-data
Summary:
Some of the code here is adapted from my site (source available on
GitHub at wchargin/wchargin.github.io). It has been improved when
possible and made worse when necessary to fit into our existing build
system with minimal churn.
As of this commit, there remain the following outstanding tasks:
- Use a non-hardcoded list of paths in static site generation router.
This is not trivial. We have the paths nicely available in
`routes.js`, but this module is written in ES6, and transitively
depends on many files written in ES6 (i.e., the whole app). Yet
naïvely it would be required from a Webpack config file, which is
interpreted as vanilla JavaScript.
- Add `csso-loader` to minify our CSS. This is easy.
- Add unit tests for `dedent`. (As is, it comes from my site
verbatim. I wrote it. dmnd’s `dedent` package on npm is insufficient
because it dedents arguments as well as the format string, which is
incorrect at least for our purposes.)
- Link in canonical static data for the site.
- Rip out the whole build system and replace it with my build config,
which is orders of magnitude saner and less bad. (By “the whole
build system” I mostly mean `webpack.config.{dev,prod}.js`.)
Test Plan:
```shell
$ yarn backend
$ yarn build
$ node ./bin/sourcecred.js start
```
wchargin-branch: static-v0
Test plan:
`git grep -i v3` only shows incidental hits in longer strings
`yarn travis --full` passes
`yarn backend` works
`yarn build` works
`yarn start` works
`node bin/sourcecred.js start` works
`node bin/sourcecred.js load sourcecred example-github` works
Paired with @wchargin
Summary:
The bridge introduced in #448 has now served its purpose, and may be
deconstructed. This implements the first part of the last step of the
plan described in that pull request.
Paired with @decentralion.
Test Plan:
After `yarn backend && yarn build`:
- `node bin/sourcecred.js start` works, and
- `yarn start` works, and
- `yarn travis --full` works.
wchargin-branch: demolish-bridge
Test plan:
`node bin/sourcecred.js load sourcecred example-github` works
`yarn start` works
`node bin/sourcecred.js start-v3` works
`yarn travis --full` passes
Paired with @wchargin
Summary:
This could also be moved into the bridge directory, but this way is
marginally easier, and it doesn’t really matter in the end.
Test Plan:
`yarn backend` followed by `node bin/sourcecredV3.js start-v3` works.
wchargin-branch: start-v3
The `load` command replaces `plugin-load`. By default, it loads data for
all plugins, and does so in parallel using execDependencyGraph. If
passed the optional `--plugin` flag, then it will load data just for
that plugin.
As an implementation detail, when loading all plugins, load calls itself
with the plugin flag set.
Usage:
`node bin/sourcecred.js load repoOwner repoName`
Test plan:
Tested by hand; I blew away my SourceCred directory and then loaded the
example-github repository.
Summary:
Our build system doesn’t make it easy to have two separate React
applications, which we would like to have for the V1 and V3 branches.
Instead, we’ll implement a bridge to maintain compatibility.
The plan looks like this:
1. Change the app from pointing to V1 to pointing to a bridge
2. Move the router into the bridge and move the V1 app from the `/`
route to the `/v1` route (e.g., `/v1/explorer`)
3. Add a V3 app under the `/v3` route
4. ???
5. Delete the V1 app and remove it from the bridge
6. Delete the bridge and move the V3 app from the `/v3` route to `/`
This commit implements Step 1.
Test Plan:
To verify that the bridge is in fact showing, apply
```diff
diff --git a/src/bridge/app/index.js b/src/bridge/app/index.js
index 379e289..72e784c 100644
--- a/src/bridge/app/index.js
+++ b/src/bridge/app/index.js
@@ -9,5 +9,11 @@ const root = document.getElementById("root");
if (root == null) {
throw new Error("Unable to find root element!");
}
-ReactDOM.render(<V1App />, root);
+ReactDOM.render(
+ <React.Fragment>
+ <h1>Hello</h1>
+ <V1App />
+ </React.Fragment>,
+ root
+);
registerServiceWorker();
```
and say “hello” back to the app.
wchargin-branch: bridge
Summary:
This provides a command-line entry point `load-plugin-v3` (which will
become `load-plugin` eventually), which fetches the GitHub data via
GraphQL and saves the resulting `RelationalStore` to disk.
A change to the Babel config is needed to prevent runtime errors of the
form `_callee7` is not defined, where `_callee7` is a gensym that is
appears exactly once in the source (in use position, not definition
position). I’m not sure exactly what is causing the error or why this
config change fixes it. But while this patch may be fragile, I don’t
think that it’s likely to subtly break anything, so I’m okay with
pushing it for now and dealing with any resulting breakage as it arises.
Paired with @decentralion.
Test Plan:
Run `yarn backend`, then run something like:
```
node bin/sourcecredV3.js load-plugin-v3 \
sourcecred example-github --plugin github
```
Inspect results in `SOURCECRED_DIR/data/OWNER/NAME/github/view.json`,
where `SOURCECRED_DIR` is `/tmp/sourcecred` by default, and `OWNER` and
`NAME` are the repository owner and name.
This example repository takes about 1.1 seconds to run. The SourceCred
repository takes about 45 seconds.
wchargin-branch: cli-load-plugin
Summary:
Due to oclif’s structure, this entry point shares its `commands`
directory with that of the V1 entry point. We’ll therefore add commands
like `start-v3` as we go.
Test Plan:
`yarn backend` works, and `node bin/sourcecredV3.js start` launches the
V1 server.
wchargin-branch: v3-cli
Summary:
Many files are unchanged. Some files have had paths updated, or new
build/test targets added.
The `types.js` file includes payload type definitions. These are
technically independent of the graph abstraction (i.e., nothing from V1
is imported and the code all still works), but it of course implicitly
depends on the V1 model. For now, we include the entirety of this file,
just so that we have a clean copy operation. Subsequent commits will
strip out this extraneous code.
Suggest reviewing with the `--find-copies-harder` argument to Git’s
diffing functions.
Test Plan:
Running `yarn travis --full` passes. Running
./src/v3/plugins/git/demoData/synchronizeToGithub.sh --dry-run
yields “Everything up-to-date”.
wchargin-branch: git-v3-copy
This commit copies the following logic necessary for downloading GitHub
data into v3. Minimal changes have been made to accomodate the new path
structure.
Test plan:
- Manually ran plugins/github/fetchGithubRepoTest.sh and verified that
it can correctly pass and fail
- Added the v3 github repo test to `yarn travis --full`
- Ran `yarn travis --full` and it passed
Paired with @wchargin
We want to reset some of our basic assumptions, and make `Graph` into a
pure graph implementation, rather than a hybrid graph and key-value
store.
This is a substantial rewrite, so we want to start from scratch in a v3/
directory and pull code into v3 as necessary. So that we can do this in
a relatively clean fashion, we're first moving the v1 and v2 code into
their own directories.
Paired with @wchargin
Test plan: Travis, and `yarn backend`, `node bin/sourcecred.js start`.
Note that `yarn backend` and `node bin/sourcecred.js start` both use the
v1 versions. We'll migrate those (by changing paths.js) to v3 when
appropriate.
Summary:
This fixes a bug introduced in #317, which only occurred in the cron job
variant of the CI script (`yarn travis --full`): the two scripts run in
the cron job depend on `yarn backend` having previously written to the
`bin/` directory, but this is precisely what we wanted to prevent. To
fix this, we simply add an additional target for `yarn backend` during
the cron job. This is a little bit wasteful in that we compile the
backend applications twice, but it’s not a big deal because (a) it only
runs in cron jobs, so it won’t slow down normal builds, and (b) it only
takes about 5 seconds, anyway.
Test Plan:
Export a `GITHUB_TOKEN` and run `yarn travis --full`, which fails before
this change and passes after it.
wchargin-branch: cron-ci-overwrite-bin
Summary:
Previously, our CI script would run `yarn backend`, which has the
side-effect of erasing the `bin/` directory. By itself, this is not
great, but not awful. However, this frequently triggers a race condition
in Prettier, causing the `check-pretty` step of the build to fail. (More
details: https://github.com/prettier/prettier/issues/4468.)
This patch changes the CI script to build the backend scripts into a
temporary directory.
Test Plan:
Before applying this patch: `yarn backend` and then `yarn travis`. If
this consistently causes a Travis failure due to `check-pretty`, then
your machine can reproduce the race condition that we‛re trying to
eliminate. (Otherwise, you can try creating a bunch more Git history…
I’m not really sure what to say. It is a race condition, after all.)
Then, apply this patch, and repeat the above steps; note that the error
no longer occurs, and that the build output is to a temporary directory.
wchargin-branch: ci-preserve-bin
As of this commit, adding the comment `//$ExpectFlowError` in flow-typed
code asserts that the next line must cause a flow error. If it does, no
error or warning is generated. If it does not, then this produces a flow
warning, which is visible to developers running `yarn flow` and
additionally causes travis to fail.
Test plan:
- As committed, `yarn travis` passes.
- I added `//$ExpectFlowError` above some line of flow-checked code which does
not currently throw an error. Afterwards, `yarn travis` failed (and a
helpful message was displayed in console on running `yarn flow`)
- I added the following bad code into one of our files:
```javascript
//$ExpectFlowError
const foo: string = 3;
```
As expected, `yarn flow` and `yarn travis` both passed.
Test Plan:
Run `yarn flow stop; yarn travis | cat` and note the absence of the
really long line that has ~2500 bytes of “Server is initializing”.
wchargin-branch: quiet-flow-server
Summary:
Placing `STOPSHIP` or `stopship` (or any case variant) in any file
tracked by Git will now cause a `yarn travis` failure. If you need to
use this string, you can concatenate it as `"stop" + "ship"` or
equivalent.
Test Plan:
In `travis.js`, change `"check-stop" + "ships"` to `"check-stopships"`,
and note that this causes the build to fail with a nice message. Note
that this also causes `check-stopships.sh` to fail even when invoked
from an unrelated directory, like `src`.
wchargin-branch: check-stopships
Summary:
A few changes were made to code that is correct (as far as I can tell),
but for which Flow can no longer infer a type parameter. The change is a
bit more annoying than it otherwise would be, because this particular
file is run directly via node and so must use Flow’s comment syntax for
type annotations, but Prettier breaks such comments in the cases that we
need. We work around this by rewriting the original code to avoid the
need for comments.
Test Plan:
In addition to standard CI, run `yarn build` and then run a server from
`build/`, to see that the production build produces a working bundle.
(That the app loads and renders is sufficient.)
wchargin-branch: upgrade-flow-v0.72.0
Summary:
This way, our frontend can talk to a backend that can read from the
filesystem (among other things).
Paired with @decentralion.
Test Plan:
```
$ yarn backend
$ SOURCECRED_DIRECTORY=/tmp/srccrd yarn start
$ # verify that the browser looks good
$ mkdir /tmp/srccrd
$ echo hello >/tmp/srccrd/world
$ curl localhost:3000/api/v1/data/world
hello
$ curl localhost:4000/api/v1/data/world
hello
```
wchargin-branch: webpack-proxy
It was doing some clever array construction that added possible booleans
to the array, then filtered them out. To make the typing simpler for
Flow's inspection, we now only put string elements in the array.
Test plan: `yarn travis --full` passed, and the CLI still works.
- scripts/backend.js: We incorrectly set an environment variable to
a boolean, when in fact it must be a string. Fixed it to set a string
value "true", and updated usage in config/babel.js
- scripts/test.js: No changes
- scripts/build.js: Removed a call to printHostingInstructions, so that
we don't need to require the package.json.
Test plan:
`yarn travis --full` passes, and the SourceCred cli still works.
- Fix accidental string-to-NaN coercion in ensureSlash
- Don't dynamically require package.json; to determine public url, just
use the environment variable or "/"
Test plan: `yarn start` and travis still work
This commit executes a micro-refactor to move all top-level app setup
code out of src/plugins/artifact/editor and into src/app. The observed
behavior from `yarn start`, which is to show the artifact editor, is
unchanged.
Summary:
We need a way for our web applications to interact with data on the
filesystem. In this commit, we introduce a webserver that serves
statically from two directory trees: first, the result of a live-updated
Webpack build; second, the SourceCred data directory.
Test Plan:
Run `yarn backend` and `node ./bin/sourcecred.js start`. When ready,
navigate to the server’s root route in a web browser. Note that a nice
React app is displayed. Then, change something in that React app source.
Note that the server console displays Webpack’s update messages, and
that refreshing the page in the browser renders the new version of the
app. Finally, visit
/__data__/graphs/sourcecred/example-github/graph.json
in the browser to see the graph for the example repository, assuming
that you had generated its graph previously.
wchargin-branch: start
This script ensures that either //@flow or //@no-flow is present in
every js file. Every existing js file that would fail this check has
been given //@no-flow, we should work to remove all of these in the
future.
Test plan:
I verified that `yarn travis` fails before fixing the other js files,
and passes afterwards.
Our SourceCred CLI tool now ipmlements printCombinedGraph and
cloneAndPrintGitGraph, but with more principled implementations and
interfaces :)
Test plan:
`yarn travis --full` passes, so I didn't delete any needed test infra.
Summary:
This commit implements the `sourcecred` command-line utility, which has
three subcommands:
- `plugin-graph` creates one plugin’s graph;
- `combine` combines multiple on-disk graphs; and
- `graph` creates all plugins’ graphs and combines them.
As an implementation detail, the `into.sh` script is very convenient,
avoiding needing to do any pipe management in Node (which is Not Fun).
When we build for release, we may want to factor that differently.
Test Plan:
To see it all in action, run `yarn backend`, and then try:
```
$ export SOURCECRED_GITHUB_TOKEN="your_token_here"
$ node ./bin/sourcecred.js graph sourcecred sourcecred
Using output directory: /tmp/sourcecred/sourcecred
Starting tasks
GO create-git
GO create-github
PASS create-github
PASS create-git
GO combine
PASS combine
Full results
PASS create-git
PASS create-github
PASS combine
Overview
Final result: SUCCESS
$ ls /tmp/sourcecred/sourcecred/
graph-github.json graph-git.json graph.json
$ jq '.nodes | length' /tmp/sourcecred/sourcecred/*.json
1000
7302
8302
```
The `node sourcecred.js graph` command takes 9.8s for me.
(The salient point of the last command is that the two small graphs have
node count adding up to the node count of the big graph. Incidentally,
we are [almost][1] at a nice round number of nodes in the GitHub graph.)
[1]: https://xkcd.com/1000/
wchargin-branch: cli
Summary:
To be honest, I have no idea what exactly this does or why it’s
necessary, but if we don’t do this then it is not possible to `import`
the exported member from a Webpack-bundled script. I’ve seen this
pattern before; one day I’ll actually figure out what it does. :-)
Test Plan:
Note that `yarn travis` (success) and `yarn travis --full` (failure; no
GitHub token) both have the expected behaviors.
wchargin-branch: execdependencygraph-export
This commit adds [oclif] as a command-line framework. It is successfully
integrated with webpack.
[oclif]: https://github.com/oclif/oclif
Usage:
`yarn backend` to build the cli.
`node bin/sourcecred.js` to launch the CLI and see usage
`node bin/sourcecred.js example` for one example command
`node bin/sourcecred.js goodbye` for another example command
William Chargin
Dandelion Mané
Dandelion Mané