I've regenerated the yarn.lock file (by removing it and then re-running
yarn). This picks up [a fix I authored][fix] for node-eval, which was
preventing `yarn test --full` from passing in node 10 and 12. With this
upgrde of transitive dependencies, we're now ready to officially support
newer versions of node.
Test plan: `yarn test` passes.
Since upgrading to flow 0.102.0, we've been having CI issues where flow
fails as "out of retries". In my testing, downgrading flow seems to
resolve this, although it's hard to be certain as the issue strikes
sporadically.
Test plan: This commit definitely works locally; hopefully it will
consistently pass in CI as well.
This commit enables Greenkeeper, along with an initial upgrade push for our dependencies.
I've reverted a number of upgrades, and also added them to the
greenkeeper ignore list. They mostly relate to babel/webpack stuff,
which I'm reluctant to dive into now (there have been major upgrades for
both babel and webpack) but we should address eventually. There are also
a few oddballs like whatwg-fetch and history.
Test plan: `yarn test --full` passes.
This commit updates eslint from v4 to v6. In doing so, I've moved off of
the create-react-app base eslint config. We were on an old version (v2)
and it doesn't make sense to update to v4, as in v4 create-react-app
uses typescript. Also, it didn't make sense to stay on
create-react-app's v2 config, because then it had unmet peer dependency
constraints on old versions of eslint.
Instead, I've moved us to use the default rules for eslint,
eslint-plugin-react, and eslint-plugin-flowtype.
I also made some changes to the codebase to satisfy the new lint rules
that came with this change.
Test plan: `yarn test` passes.
This commit deletes and regenerates the `yarn.lock` file, with the
effect that all dependencies are upaded to the latest version allowed by
our package.json. (For example, if we are pinned to `^2.4.0`, we might
now get `2.6.3`.)
This commit was generated via:
```Bash
$ rm yarn.lock
$ yarn
```
Test plan: `yarn test --full` passes, and I also manually tested the
frontend.
This necessitated a number of type fixes:
- Upgraded the express flow-typed file to latest
- Added manual flow error suppression to where the express flow-typed
file is still using a deprecated utility type
- Removed type polymorphism support on map.merge (see context here[1]).
We weren't using the polymorphism anywhere so I figured it was simplest
to just remove it.
- Improve typing around jest mocks throughout the codebase.
Test plan: `yarn test --full` passes.
[1]: https://github.com/flow-typed/flow-typed/issues/2991
This commit updates our prettier version from `1.13` to `1.18`. Looks
like software does get better over time! I like all of the changes.
Test plan: `yarn test` passes. I've manually inspected the diffs.
When we took a dep on better-sqlite3 in #836, we used a fork, because
better-sqlite3 did not yet support private in-memory databases via the
`:memory:` filepath. As of better-sqlite3 v5, this has been added to
mainline, so we no longer need the fork.
The v4->v5 transition involves some breaking changes. The only ones that
affected us were two field renames, from `lastUpdateROWID` to
`lastUpdateRowid`, and `returnsData` to `reader`.
Test plan:
After updating the field accesses, `yarn test --full` passes. For added
safety, I also blew away cache, loaded a nontrivial repository, and
verified that the full cred workflow still works.
cc @wchargin
* Add FileUploader with inspection test
TODO: get it working
* Add a FileUploader component, with inspection test
This adds a FileUploader component, which allows the user to upload JSON
files. Rather than using automated testing, it has an inspection test.
The inspection test may be run by navigating to:
http://localhost:8080/test/FileUploader/
This commit also adds some basic utility functions for defining
inspection tests to `routeData.js`. We should improve support for
inspection tests in the future; see [#1148].
[#1148]: https://github.com/sourcecred/sourcecred/issues/1148
Test plan: Ran the included inspection test.
Resolves#1067
Adds the CLI commands:
`sourcecred clear --all` -- removes the $SOURCECRED_DIRECTORY
`sourcecred clear --cache` -- removes the cache directory
`sourcecred clear --help` -- provides usage info
`sourcecred clear` -- prompts the user to be more specific
Test plan:
The unit tests ensure that the command is properly wired into the
sourcecred CLI, including help text integration. However, just to be
safe, we can start by verifying that calling `sourcecred` without
arguments lists the `clear` command as a valid option, and that
calling `sourcecred help clear` prints help information. (Note: it's
necessary to run `yarn backend` before testing these changes)
The unit tests also ensure that the command removes the proper
directories, so there isn't really a need to manually test it,
although the reviewer may choose to do so to be safe.
Although out of scope for unit tests on this function, we can also do
integration tests, to make sure that running the clear command doesn't
leave the sourcecred directory in an invalid state from the perspective of the `load` command.
```js
$ yarn backend;
$ node bin/sourcecred.js load sourcecred/example-github;
$ node bin/sourcecred.js clear --cache;
$ node bin/sourcecred.js load sourcecred/example-github;
$ node bin/sourcecred.js clear --all;
$ node bin/sourcecred.js load sourcecred/example-github;
```
The expected behavior of the above command block is that the load command never fails or throws an error.
@decentralion and I discussed the scenario where `rimraf` errors.
We decided that testing this scenario wasn't necessary, because
`rimraf` doesn't error if a directory doesn't exist, and
rimraf's maintainer suggests [monkey-patching the fs module]
to get rimraf to error in testing scenarios.
Thanks @decentralion for reviewing and pair-programming this with me.
[monkey-patching the fs module]: https://github.com/isaacs/rimraf/issues/31#issuecomment-29534796
This commit integrates an bare skeleton of the odyssey frontend that we
implemented in the [odyssey-hackathon] repository. You can see the
working frontend that we are trying to port over at
[sourcecred.io/odyssey-hackathon/][scio].
The prototype in the other repository has some tooling choices which are
incompatible/redundant with decisions in our codebase (sass vs
aphrodite), and requires some tools not yet present here
(svg-react-loader). This commit includes the build and integration work
needed to port the prototype frontend into mainline SourceCred. The
frontend scaffold isn't yet integrated with any "real" Odyssey data.
One potential issue: right now, every page that is rendered from the
SourceCred homepage is contained within a [homepage/Page], meaning that
it has full SourceCred website styling, along with the SourceCred
website header. The [application][scio] also has a header. Currently, I
work around this by having the Odyssey UI cover up the base header (via
absolute positioning), which works but is hacky. We can consider more
principled solutions:
- Finding a way to specify routes which aren't contained by
[homepage/Page]; maybe by adding a new top-level route
[here][route-alternative].
- Unify the headers for the Odyssey viewer and the page as a whole
(sounds like inappropriate entanglement?)
- Have a website header and also an application header (sounds ugly?)
[homepage/Page]: ee1d2fb996/src/homepage/Page.js
[route-alternative]: ee1d2fb996/src/homepage/createRoutes.js (L17)
Test plan: Run `yarn start`, and then navigate to
`localhost:8080/odyssey/`. observe that a working website is displayed,
and that the cred logo next to the word "SourceCred" is loaded properly
(i.e. svg-react-loader is integrated properly). Observe that there are
no build/compile errors from either `yarn start` or `yarn build`. Also,
observe that the UI looks passably nice, and that if the number of
elements in the entity lists is larger than can be displayed, the
sidebar pane scrolls independently.
The UI was tested in both Chrome and Firefox.
[odyssey-hackathon]: https://github.com/sourcecred/odyssey-hackathon
[scio]: https://sourcecred.io/odyssey-hackathon/
Thanks to @jmnemo, as the implementation is based on [his work].
[his work]: https://github.com/jmnemo/hackathon-event/
Summary:
There have been some breaking changes that require new type annotations,
which is a good thing: these prevent `any`-leakage.
Test Plan:
Run `yarn flow`.
wchargin-branch: flow-v0.86.0
Motivated by my desire for `.toMatchInlineSnapshot()`. Really we just
need and updated typing file for this, but I upgraded `jest` too to just
get us in a clean state.
Commit generated via:
```
yarn add --dev jest
flow-typed install jest@23.6.0
```
Test plan: `yarn test`
This commit upgrades the flow-type eslint plugin to latest, and writes
new rules into the eslintrc. To keep the diff clean, the rules are
disabled: I will turn them on individually (fixing errors) in followon
commits.
Test plan: `yarn test`.
Uncommenting the lines produces many lint errors (but the linter still operates as expected).
Summary:
I selected this over the alternatives, `sqlite` and `sqlite3`, primarily
because its README explicitly acknowledges that using asynchronous APIs
for CPU-bound or serialized work units are worse than useless. To me,
this is a sign that the maintainer has his head on straight.
The many-fold performance increase over `sqlite` and `sqlite3` is nice
to have, too.
For now, we use my fork of the project, which includes a critical patch
to support private in-memory databases via SQLite’s standard `:memory:`
filepath. When this patch is merged upstream, we can move back to
mainline.
Test Plan:
The following session demonstrates the basic API and validates that the
install has completed successfully:
```js
const Database = require("better-sqlite3");
const db = new Database("/tmp/irrelevant", {memory: true});
db.prepare("CREATE TABLE pythagorean_triples (x, y, z)").run();
const insert = db.prepare("INSERT INTO pythagorean_triples VALUES (?, ?, ?)");
const get = db.prepare(
"SELECT rowid, x * x + y * y AS xxyy, z * z AS zz FROM pythagorean_triples"
);
function print(x) {
console.log(JSON.stringify(x));
}
print(insert.run(3, 4, 5));
print(get.all());
print(insert.run(5, 12, 13));
print(get.all());
db.prepare("DELETE FROM pythagorean_triples").run();
print(get.all());
```
It prints:
```js
{"changes":1,"lastInsertROWID":1}
[{"rowid":1,"xxyy":25,"zz":25}]
{"changes":1,"lastInsertROWID":2}
[{"rowid":1,"xxyy":25,"zz":25},{"rowid":2,"xxyy":169,"zz":169}]
[]
```
wchargin-branch: dep-better-sqlite3
Summary:
This upgrade didn’t require fixing any new errors, but Flow is a good
dependency to keep on top of.
Test Plan:
Running `yarn flow` suffices.
wchargin-branch: flow-v0.80.0
Summary:
Mostly Webpack loaders that have become unused through various config
changes.
Test Plan:
Check that these packages are not used anywhere except as transitive
dependencies:
```shell
$ git show --format= package.json |
> sed '1,4d' | grep '^-' | cut -d\" -f2 | git grep -cf -
yarn.lock:3
```
Also, `yarn && yarn test --full` works, and `yarn start` works, and
`yarn backend && node ./bin/sourcecred.js load sourcecred/example-git`
works.
wchargin-branch: remove-unused-deps
Summary:
As of #775, this is no longer used.
Test Plan:
A `git grep eslint-loader` shows no results, and `yarn test --full`
passes.
wchargin-branch: remove-eslint-loader
Test Plan:
Note that `yarn backend; node bin/sourcecred.js help` still works.
Note that `git grep -i oclif` returns no results.
Rejoice.
wchargin-branch: remove-oclif
Summary:
We store the relational view in `view.json.gz` instead of `view.json`,
taking advantage of the isomorphic `pako` library for gzip encoding and
decoding.
Sample space savings (note that post bodies are included; i.e., #747 has
not been applied):
SAVE OLD (B) NEW (B) REPO
89.7% 25326 2617 sourcecred/example-github
82.9% 3257576 555948 sourcecred/sourcecred
85.2% 11287621 1665884 ipfs/js-ipfs
88.0% 20953425 2520358 gitcoinco/web
84.4% 38196825 5951459 ipfs/go-ipfs
84.9% 205770642 31101452 tensorflow/tensorflow
<details>
<summary>Script to generate space savings output</summary>
```shell
savings() {
printf '% 7s % 11s % 11s %s\n' 'SAVE' 'OLD (B)' 'NEW (B)' 'REPO'
for repo; do
file="${SOURCECRED_DIRECTORY}/data/${repo}/github/view.json.gz"
if ! [ -f "${file}" ]; then
printf >&2 'warn: no such file %s\n' "${file}"
continue
fi
script="$(sed -e 's/^ *//' <<EOF
repo = '${repo}'
pre_size = $(<"${file}" gzip -dc | wc -c)
post_size = $(<"${file}" wc -c)
percentage = '%0.1f%%' % (100 * (1 - post_size / pre_size))
p = '% 7s % 11d % 11d %s' % (percentage, pre_size, post_size, repo)
print(p)
EOF
)"
python3 -c "${script}"
done
}
```
</details>
Closes#750.
Test Plan:
Comparing the raw old version with the decompressed new version shows
that they are identical:
```
$ <~/tmp/sourcecred/data/sourcecred/example-github/github/view.json \
> shasum -a 256 -
63853b9d3f918274aafacf5198787e18185a61b9c95faf640a1e61f5d11fa19f -
$ <~/tmp/sourcecred/data/sourcecred/example-github/github/view.json.gz \
> gzip -dc | shasum -a 256
63853b9d3f918274aafacf5198787e18185a61b9c95faf640a1e61f5d11fa19f -
```
Additionally, `yarn test --full` passes, and `yarn start` still loads
data and runs PageRank properly.
wchargin-branch: gzip-relational-view
Summary:
This patch adds independent exponential backoff to each individual
GitHub GraphQL query. We remove the fixed `GITHUB_DELAY_MS` delay before
each query in favor of this solution, which requires no additional
configuration (thus resolving a TODO in the process).
We use the NPM module `retry` with its default settings: namely, a
maximum of 10 retries with factor-2 backoff starting at 1000ms.
Empirically, it seems very unlikely that we should require much more
than 2 retries for a query. (See Test Plan for more details.)
This is both a short-term unblocker and a good kind of thing to have in
the long term.
Test Plan:
Note that `yarn test --full` passes, including `fetchGithubRepoTest.sh`.
Consider manual testing as follows.
Add `console.info` statements in `retryGithubFetch`, then load a large
repository like TensorFlow, and observe the output:
```shell
$ node bin/sourcecred.js load --plugin github tensorflow/tensorflow 2>&1 | ts -s '%.s'
0.252566 Fetching repo...
0.258422 Trying...
5.203014 Trying...
[snip]
1244.521197 Trying...
1254.848044 Will retry (n=1)...
1260.893334 Trying...
1271.547368 Trying...
1282.094735 Will retry (n=1)...
1283.349192 Will retry (n=2)...
1289.188728 Trying...
[snip]
1741.026869 Ensuring no more pages...
1742.139978 Creating view...
1752.023697 Stringifying...
1754.697116 Writing...
1754.697772 Done.
```
This took just under half an hour, with 264 queries total, of which:
- 225 queries required 0 retries;
- 38 queries required exactly 1 retry;
- 1 query required exactly 2 retries; and
- 0 queries required 3 or more retries.
wchargin-branch: github-backoff
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 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:
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:
In addition to a routine libdef update, we also need to work around a
particularly nasty new bug in Flow, which requires `any`-casts that are
even more unsafe than usual. That said, I think that it’s worth that
cost to remain up to date with Flow, so that we can amortize future such
issues.
Test Plan:
Running `yarn travis --full` passes.
wchargin-branch: upgrade-flow-v0.76.0
This required adding a [files property] to the package.json,
otherwise oclif started complaining.
Test plan: I manually tested both CLI commands, and they seem fine.
[files property]: https://docs.npmjs.com/files/package.json#files
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:
Pending the resolution of brigand/babel-plugin-flow-react-proptypes#201,
we’re removing this plugin from our build, because it results in
incorrect code generation. We’ll be happy to add it back if the bug is
fixed.
Test Plan:
Fingers crossed.
wchargin-branch: remove-bpfrpt
Summary:
We plan to use this to more intelligently extract references from GitHub
text content. See #432.
Test Plan:
In a Node shell, running
```js
const cm = require("commonmark");
var parser = new cm.Parser();
var ast = parser.parse("Hello\nworld");
var html = new cm.HtmlRenderer({softbreak: " "}).render(ast);
console.log(html);
```
prints `<p>Hello world</p>`.
wchargin-branch: commonmark
Summary:
This just slows down commits by a few seconds. We `check-pretty` in
Travis, so this doesn’t actually catch anything—and, anecdotally, it has
never caught anything for me because I automatically run `prettier` on
save and also (almost) always run Travis before pushing.
Test Plan:
Run `git commit --amend --no-edit` and note that it is now fast!
wchargin-branch: no-lint-on-commit
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
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
Setup following directions from [webpack-node-externals]
[webpack-node-externals]: https://www.npmjs.com/package/webpack-node-externals
This unblocks #210.
Test plan: `yarn backend` still succeeds, and the binary scripts still
work. The resultant binaries are much smaller, as seen below (note build
time is the same).
before:
```
❯ yarn backend
yarn run v1.5.1
$ node scripts/backend.js
Building backend applications...
Compiled successfully.
File sizes after gzip:
231.37 KB bin/printCombinedGraph.js
199.5 KB bin/fetchAndPrintGithubRepo.js
46.41 KB bin/cloneAndPrintGitGraph.js
21.48 KB bin/createExampleRepo.js
17.71 KB bin/loadAndPrintGitRepository.js
Build completed; results in 'bin'.
Done in 4.46s.
```
after:
```
❯ yarn backend
yarn run v1.5.1
$ node scripts/backend.js
Building backend applications...
Compiled successfully.
File sizes after gzip:
27.78 KB bin/printCombinedGraph.js
12.73 KB bin/cloneAndPrintGitGraph.js
12.41 KB bin/fetchAndPrintGithubRepo.js
6.03 KB bin/loadAndPrintGitRepository.js
5.52 KB bin/createExampleRepo.js
Build completed; results in 'bin'.
Done in 4.28s.
```
Test Plan:
This snapshot test is too unwieldy to actually read—it’s 1000 lines of
opaque SHAs and thrice-stringified JSON objects—so it should be
interpreted as a regression test only. The programmatic tests should
suffice.
wchargin-branch: wip-git-create-graph
Previously, the address module exported `sortedByAddress`, a utility
function that sorts an array of `Addressable`s. This function was only
used in test code.
This commit replaces it with generic usage of `lodash.sortBy`. This
reduces the API surface area of the module, and removes test-only code
from the exported api.
New dependency added: `lodash.sortby`
https://www.npmjs.com/package/lodash.sortby
Summary:
This commit moves our existing frontend tests to use Enzyme’s shallow
rendering API <http://airbnb.io/enzyme/docs/api/shallow.html>. The
benefit over also using `react-test-renderer` is simply consistency (the
two are functionally equivalent); the benefits over `mount` are that
subcomponents cannot contaminate the test state (i.e., you’re only
testing one component at a time), that the resulting snapshots are more
readable because the root props are not shown, and that the
implementation is more efficient. This is a follow-up to #102.
In a case where we actually need a full DOM tree, we should still feel
free to use `mount`, but we haven’t needed that yet.
Test Plan:
Verify that the new `ContributionList.test.js.snap` represents the same
data as the old one.
wchargin-branch: standardize-enzyme-shallow
Summary:
This is our first dynamic test of a React component! Enzyme looks pretty
easy to use to me, for both snapshot tests and interaction simulation.
In doing so, we catch a minor bug in the edge case where a contribution
is not owned by any plugin (`colSpan`, not `colspan`). This edge case
does not appear in the sample data, but it does appear in the test data,
even prior to this commit. The previous renderer, `react-test-renderer`,
appears not to surface this error. Furthermore, this bug did not cause
any user-visible errors except a `console.error`.
Test Plan:
Inspect the snapshot file to make sure that it is reasonable. (The
existing test case has its snapshot regenerated due to formatting
differences between the two renderers.)
To test that the browser error is fixed, render a contribution list on a
GitHub graph but with an empty adapter set. One way to do this is to comment out line 7 of
`standardAdapterSet.js`; alternately, you can use the React Dev Tools to
select the `ContributionList` node, then run
```js
$r.props.adapters.adapters = {};
$r.forceUpdate();
```
Note subsequently that there is no console error and that the `<td>`s in
question span three columns.
wchargin-branch: contributionlist-dynamic-test
Summary:
This commit begins to extend the artifact editor to display
contributions. To display contributions from arbitrary plugins, we need
to communicate with those plugins somehow. We do so via an adapter
interface that plugins implement; included in this commit is an
implementation of this interface for the GitHub plugin (partially: we
punt on rendering).
This includes a snapshot test. The snapshot format is designed to be
human-readable and -auditable so that it can serve as documentation.
Test Plan:
Run the application with `yarn start`. Then, fetch a graph and watch as
its contributions appear in the view.
wchargin-branch: contributions-and-adapters
Summary:
It’s a whole new world of GraphQL! Our parser is now just a GraphQL
query that asks for exactly what we want and dumps it to a file. The
data exposed by the v4 API is also in a much nicer format than that of
the v3 API, so this is pretty much a universal improvement.
Currently, we do not handle pagination. We require that the repository
in question have fewer than a fixed number of issues, and comments per
issue, and reviews per PR, and review comments per PR, and so on. If
this limit is exceeded, the script will fail-fast with a nice error
message. To fix this, we’ll need to write a general-purpose pagination
API that allows traversing cursors at any level of the query.
Paired with @wchargin.
Test Plan:
Run
$ GITHUB_TOKEN="your_token_here" src/backend/fetchGitHubRepoTest.sh
and verify that it exits with 0. Note that if you change this script’s
repository from `tiny-example-repository` to `sourcecred`, the script
correctly fails and outputs a useful diff.
wchargin-branch: github-v4-graphql
Summary:
We need this for testing graph equality: deep-equality is not sufficient
because two graphs can be logically equal even if, say, two nodes are
added in different orders.
This commit adds a dependency on `lodash.isequal` for deep equality.
Test Plan:
New unit tests added. Run `yarn flow && yarn test`.
wchargin-branch: graph-equals
Reorganize the code so that we have a single package.json file, which is at the root.
All source code now lives under `src`, separated into `src/backend` and `src/explorer`.
Test plan:
- run `yarn start` - it works
- run `yarn test` - it finds the tests (all in src/explorer) and they pass
- run `yarn flow` - it works. (tested with an error, that works too)
- run `yarn prettify` - it finds all the js files and writes to them
dependabot[bot]
Dandelion Mané
greenkeeper[bot]
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Brian Litwin
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