fixes#18831
We update the nix derivation to build android by passing `hermesEnabled` flag which checks the environment variable and if the environment variable is not set we default `hermesEnabled` to `true`.
This ensures that `hermes` is disabled for debug builds and enabled for release builds.
In this commit we also
- rename `nix/mobile/android/release.nix` → `nix/mobile/android/build.nix` since that nix file no longer generates release only builds.
- cleanup 2 other env vars and use the `gradle` project format
- replace `BUILD_NUMBER` with `verisonCode` for consistency
- replace `androidGradleOpts ` with `buildUrl `
- bump `status-jenkins-lib` to v1.8.7
After upgrading `react-native` to `0.72.5` we frequently started seeing the _red screen of death_ on both `Android` and `iOS` simulators right after the app was built and installed.
This used to happen because our workflow required us to do the following :
- `make run-clojure`
- `make run-metro`
- `make run-ios` OR `make run-android`
The problem with this approach was after `metro` was started the `iOS`, `Android` build step would change the files that `metro` couldn't handle and hence metro would go out of sync.
The quick fix back then was to restart `metro` terminal and to open the app again from the simulator.
This was however not a good DX.
This commit fixes that.
We no longer rely on `react-native` cli to generate and deploy debug builds on simulators. We take control of the process via our own script. The new workflow introduced in this commit will first build the app, then install the app on the simulators and then start metro terminal. When `metro` is successfully running the script will then open the app.
The new workflow now is :
- `make run-clojure`
- `make run-ios` OR `make run-android`
We are moving location of symlinks for build derivations for `gcroots`
from `/nix/var/nix/gcroots/per-user` to `.nix-gcroots` in the repo to
avoid errors like this caused by profile migration in `2.14` release:
```
error: creating directory '/nix/var/nix/gcroots/per-user/joe': Permission denied
```
For more details see: https://github.com/NixOS/nix/issues/8564
To upgrade without using `make nix-purge` use `make nix-upgrade`.
Related infra change:
https://github.com/status-im/infra-ci/commit/37c6ce47
Signed-off-by: Jakub Sokołowski <jakub@status.im>
The purpose of this commit is to allow running `maestro` automations to enhance productivity by **automating** mundane tasks.
Other flows like
- send contact request
- sync devices
- join a community
etc will be a part of follow ups.
In this commit we provide a `make` command to run a very common task like creating account & login :
`make auto-login`
We also allow another `make` command to run any other custom flow :
`make auto-custom FLOW="maestro/create-account-or-login.yaml"`
A `maestro` folder has been added with 3 `yaml` files which are very easy to understand
ref : https://maestro.mobile.dev/api-reference/commands
We recently disabled `hermes` for debug builds here -> https://github.com/status-im/status-mobile/pull/18675
A side effect of that is when we run `make nix-update-gradle` the `hermes` pom gets removed from `deps.list`
This pom is necessary for release builds.
Currently that pom exists in `deps.list` but someone may accidentally remove it when running `make nix-update-gradle`
In this commit we remove the conditional implementation of `hermes` or `jsc` in `build.gradle`
This ensures that the `hermes` pom we need during release builds is not removed from `deps.list`.
I also ran `make nix-update-gradle` just to be sure.
I compared the apk in this commit to other PRs and the size increased by 2MB.
A small price to pay so that the team can run Malli locally without crashing their debug app frequently.
I've added a FIXME comment in the code for when we want to cut back on bundle size later.
fixes#18493
We enabled `hermes` for android in the `react-native` upgrade to `0.72.5`
Although things seemed fine but developers were seeing frequent crashes in their local environment.
After some investigation the crashes were traced to max native call stack depth in `hermes` engine.
Disabling `hermes` for local debug builds helps fix that issue.
This commit disables `hermes` by default with the help of a exporting an environment variable in the `make run-android` command.
It is annoying that this also modifies `android/gradle.properties` so we keep `hermesEnabled` as `false` there as well.
We also enable `hermes` when generating release builds so that we can take advantage of `hermes` engine in release builds.
We also add a log to print whether `hermes` is enabled or not. I think its helpful to have this so that we know whether `hermes` is enabled or not.
* feat: added react-native-biometrics dependency
* chore: added malli schema to auth
* fix: malli schema
* feat: using react-native-biometrics
* fix: removed biometry not-enrolled error supression
* feat: added check for enabled biometric
* fix: biometrics error handling on ios
* chore: remove touch-id library
* chore: cleanup
* removed proj.list dep
* fix: gradle get_projects regex edge-case
Handles cases when the gradle project has a description, which shows up when running `gradle projects` as (`react-native-biometrics` - react-native-biometrics), breaking `make nix-update-gradle`. Here we're just adjusting the regex to ignore everything in the line after the closing (`).
* build: ran "make nix-update-gradle"
* chore: comment typo
* chore: replaced old lib in test mocks
* fix: addressed review comments
* fix: using event for standard-auth biometrics
* ref: using ex-cause for biometric error codes
* fix: removed promesa changes
* fix: auth slide biometric success not triggered
### Summary
We need to bump `kotlin` Plugin version to `1.9.0` because the `nixpkgs` upgrade will set default `gradle` version to `8.4`.
`gradle` version `8.4` comes with a base `kotlin` version of `1.9.0` which becomes incompatible with our existing version of `1.7`
Otherwise we get errors like this :
```
e: /Users/siddarthkumar/code/experiments/status-mobile/node_modules/@react-native/
gradle-plugin/src/main/kotlin/com/facebook/react/utils/TaskUtils.kt: (25, 7): Class
'kotlin.collections.CollectionsKt__CollectionsKt' was compiled with an incompatible version of Kotlin.
The binary version of its metadata is 1.9.0, expected version is 1.7.1.
The class is loaded from /nix/store/3a228ppiiljfvsrxyq15h25chmiwsmbh-gradle-8.4/lib/gradle/lib/
kotlin-stdlib-1.9.10.jar!/kotlin/collections/CollectionsKt__CollectionsKt.class
.
.
.
```
needed for https://github.com/status-im/status-mobile/pull/18321
In this commit we set `kotlinPluginVersion` to `1.9.0` and update `gradle` dependencies.
#### Platforms
- Android
`getEnvWithDefault.nix` prints a trace message in console when a default value is not set.
In this commit we add a check to see if default value matches the value of that env var.
Otherwise we get log messages like these when running `make run-ios`
```
trace: getEnvWithDefault IOS_STATUS_GO_TARGETS
(default: ios/arm64;iossimulator/amd64): ios/arm64;iossimulator/amd64
trace: getEnvWithDefault IOS_STATUS_GO_TARGETS
(default: ios/arm64;iossimulator/amd64): ios/arm64;iossimulator/amd64
```
We also fix a tiny mistake in `make run-ios` status-go target by updating the delimiter to be a semi-colon instead of a comma.
I tried doing a clean pod install and was faced with this :
```
Installing Yoga (1.14.0)
Installing boost (1.76.0)
[!] Error installing boost
Verification checksum was incorrect, expected
f0397ba6e982c4450f27bf32a2a83292aba035b827a5623a14636ea583318c41, got
5e89103d9b70bba5c91a794126b169cb67654be2051f90cf7c22ba6893ede0ff
```
related issue in react-native repo : https://github.com/facebook/react-native/issues/42180
In this commit we patch the pod specs provided by react native to rely on `sourceforge` instead `jfrog` to get boost.
This commit is a pre-requisite to upgrading `react-native` to `0.73.x`, now that react-native has completely moved their android code over from `Java` to `Kotlin` , it is also necessary for us to begin doing the same.
This commit converts just 2 files which are important at the moment.
- `android/app/src/main/java/im/status/ethereum/MainActivity.java`
- `android/app/src/main/java/im/status/ethereum/MainApplication.java`
I will can convert the remaining files in follow ups.
Fix all component tests after the latest RN upgrade.
Fixes https://github.com/status-im/status-mobile/issues/18157
Closes https://github.com/status-im/status-mobile/pull/18235
Dependency changes
- Upgraded Jest: from 26.6.3 to latest 29.7.0.
- Upgraded @testing-library/jest-native: from 5.3.0 to latest 5.4.3
- Upgraded @testing-library/react-native: from 11.5.4 to 12.4.2
- Removed explicit dependency on jest-circus, this is now the default test
runner.
- Removed explicit dependency on jest-environment-node. This is handled by the
package manager.
- Added jest-silent-reporter at version 0.5.0.
### Why component tests were failing?
Many tests were failing because we were using RN Testing Library (RNTL) in an
unreliable fashion. With the recent library upgrades, the unreliability was
excerbated. Other times, the tests were incorrectly arranging data.
### with-redefs does not work with async code
Generally speaking, with-redefs should not be used with async code, assume the
worst. The scope of the macro will cease to exist by the time the async code
runs. In many tests we were using with-redefs, then calling render, but for some
components that use use-effect, JS timers, animations, etc it's unreliable and
were the reason for failures.
It's easy to reproduce too:
```clojure
(defn foo []
:foo)
(foo)
;; => :foo
(with-redefs [foo (constantly :bar)]
(foo))
;; => :bar
(js/setTimeout
(fn []
(tap> [:calling-foo (foo)]))
100)
;; Taps [:calling-foo :foo]
;; As you would expect, when running without with-redefs, it prints :foo.
;; So far so good, but whatch what happens with async code:
(with-redefs [foo (constantly :bar)]
(js/setTimeout
(fn []
(tap> [:calling-foo (foo)]))
100))
;; Taps [:calling-foo :foo]
;; ====> PROBLEM: Taps :foo, not :bar as one might expect
```
### Not waiting on wait-for
When test-helpers.component/wait-for is used, subsequent assertions/etc should
be done after the promise returned by wait-for is resolved. But remember to not
perform side-effects inside the wait-for callback (check out the docs
https://callstack.github.io/react-native-testing-library/docs/api#waitfor).
Most, if not all of our usages of wait-for were not waiting.
#### Improvement 1 - Silence Jest on demand
If you need to re-run component tests frequently, you may want to reduce the
output verbosity. By passing JEST_USE_SILENT_REPORTER=true to make
component-test or make component-test-watch you will see a lot less noise and be
able to focus on what really matters to you.
#### Improvement 2 - Selectively focus/disable tests
Because of our need to first compile CLJS to JS before running tests via Jest,
we couldn't easily skip or focus on specific tests. From this commit onwards, we
should never again have to change the list of requires in files core_spec.cljs.
Commenting out required namespaces gives a bad DX because it causes constant
rebasing issues.
#### Improvement 3 - Translations now work as in prod code (but only English)
Translations performed by *-by-translation-text can be done now without any
workaround under the hood. The query functions are now linted just like
i18n/label, which means static translation keywords must be qualified with :t/,
which is good for consistency.
I can't remember the number of times I have had to ask developers to run `make run-ios | xcbeautify` when debugging iOS build failures and they do not have `xcbeautify` installed on their environment.
`xcbeautify` helps make `xcodebuild` output more readable and to identify problems quickly.
This commit adds `xcbeautify` to iOS shell and to `make run-ios` so that we get readable output by default.
The existing purge script for Darwin would fail and stop at many stages.
This commit makes the script more robust to certain failures that were observed and documented in https://github.com/status-im/status-mobile/issues/16404
`react-native-reanimated` generates write protected files during build time which are problematic because we copy over `node_modules` from `nix` store and when replacing them with new node modules we are manually asked to confirm this overwrite.
This used to happen before with `.cxx` files but now it also happens with `.so` files.
This commit fixes those permissions.
partially fixes#18211
This commit does many things :
- Upgrade `react-native ` to `0.72.5`
- Upgrade `react-native-reanimated` to `3.5.4`
- Upgrade `react-native-navigation` to `7.37.0`
- `ndkVersion` has been bumped to `25.2.9519653`
- `cmakeVersion` has been bumped to `3.22.1`
- `kotlinVersion` has been bumped to `1.7.22`
- `AGP` has been bumped to `7.4.2`
- `Gradle` has been upgraded to `8.0.1`
- Android `CompileSDK` and `TargetSDK` have been bumped to 33
- `@react-native-async-storage/async-storage` has been upgraded to `1.19.3`
- `@walletconnect/client` has been nuked
- some of the old `react-native-reanimated` code has been nuked
- `react-native-keychain` fork has been replaced with `8.1.2`
- On Android we are currently relying on `Hermes` Engine.
- On iOS we are currently relying on `JSC`
- We are not enabling new architecture for now (I have plans for that in the future) ref: https://github.com/status-im/status-mobile/issues/18138
IOS only PR : https://github.com/status-im/status-mobile/pull/16721
Android only PR : https://github.com/status-im/status-mobile/pull/17062
- `make run-metro` now has a target of `android` which was `clojure` earlier, this will increase the time it takes to start metro terminal but this is needed otherwise you will get a nasty error while developing for android locally.
After upgrading MacOS to Sonoma and Xcode to 15, pod install stage would fail with clang errors.
Turns out that react-native's configure glog script sets 2 additional flags, CC and CXX which conflicts with flags already set in nix iOS shell.
In this commit we :
- bump clang from 10.0.0 to 15.0.7
- patch glog configure script to avoid setting those flags
This fixes the iOS builds.
Problem: failed equality checks as in "(is (= expected actual))" will give a
single, long line of output that for anything but the simplest data structures
is unreadable by humans, and the output doesn't give a useful diff.
Solution: use library https://github.com/nubank/matcher-combinators and its test
directive "match?" which will pinpoint where two data structures differ. Then,
instead of "(is (= ...", use "(is (match? expected actual)". It works
beautifully.
The library offers other nice matchers, but the majority of the time match? is
sufficient.
Can we use another test runner like Kaocha? kaocha-cljs2
(https://github.com/lambdaisland/kaocha-cljs2) would be able to print better
test errors out of the box, among other features, but I have no clue if it would
work well or at all in our stack (in theory yes, but it's a larger piece of
work).
This commit is the foundational step to start using malli
(https://github.com/metosin/malli) in this project.
Take in consideration we will only be able to realize malli's full power in
future iterations.
For those without context: the mobile team watched a presentation about malli
and went through a light RFC to put everyone on the same page, among other
discussions here and there in PRs.
To keep things relatively short:
1. Unit, integration and component tests will short-circuit (fail) when
inputs/outputs don't conform to their respective function schemas (CI should
fail too).
2. Failed schema checks will not block the app from initializing, nor throw an
exception that would trigger the LogBox. Exceptions are only thrown in the
scope of automated tests.
3. There's zero performance impact in production code because we only
instrument. Instrumentation is removed from the compiled code due to the
usage of "^boolean js.goog/DEBUG".
4. We shouldn't expect any meaningful slowdown during development.
**What are we instrumenting in this PR?**
Per our team's agreement, we're only instrumenting the bare minimum to showcase 2 examples.
- Instrument a utility function utils.money/format-amount using the macro
approach.
- Instrument a quo component quo.components.counter.step.view/view using the
functional approach.
Both approaches are useful, the functional approach is powerful and allow us to
instrument anonymous functions, like the ones we pass to subscriptions or event
handlers, or the higher-order function quo.theme/with-theme. The macro approach
is perfect for functions already defined with defn.
**I evaluated the schema or function in the REPL but nothing changes**
- If you evaluate the source function, you need to evaluate schema/=> or
schema/instrument as well.
- Remember to *var quote* when using schema/instrument.
- You must call "(status-im2.setup.schema/setup!)" after any var is
re-instrumented. It's advisable to add a keybinding in your editor to send
this expression automatically to the CLJS REPL, or add the call at the end of
the namespace you are working on (similar to how some devs add "(run-tests)"
at the end of test namespaces).
**Where should schemas be defined?**
For the moment, we should focus on instrumenting quo components, so define each
function schema in the same namespace as the component's public "view" var.
To be specific:
- A schema used only to instrument a single function and not used elsewhere,
like a quo component schema, wouldn't benefit from being defined in a separate
namespace because that would force the developer to constantly open two files
instead of one to check function signatures.
- A common schema reused across the repo, like ":schema.common/theme" should be
registered in the global registry "schema.registry" so that consumers can just
refer to it by keyword, as if it was a built-in malli schema.
- A common schema describing status-go entities like message, notification,
community, etc can be stored either in the respective
"src/status_im2/contexts/*" or registered globally, or even somewhere else.
This is yet to be defined, but since I chose not to include schemas for them,
we can postpone this guideline.
Upgrades and cleans up all production Clojure dependencies and 1 dev-only
dependency (com.taoensso/tufte).
- Remove warning "WARNING: update-keys already refers to:
#'clojure.core/update-keys in namespace: io.aviso.exception"
- Remove hickory and mvxcvi/alphabase dependencies they are not used.
- Upgrade com.taoensso/tufte from 2.1.0 to 2.6.3
- Upgrade transit-cljs from 0.8.248 to 0.8.280
- Upgrade cljs-bean from 1.3.0 to 1.9.0
- Remove workaround for com.taoensso/timbre in shadow-cljs.edn
- Upgrade com.taoensso/timbre from 4.10 (Status fork) to 6.3.1
Since the `default` shell doesn't have Ruby, the `nix-update-gems`
target would incorrectly use the system Ruby instead of the one from Nix.
Signed-off-by: Jakub Sokołowski <jakub@status.im>
Clojure dependencies require only JARs to work. Downloading POMs is both
a waste of time, space, and bandwidth. In addition POMs create edge
cases that we would have to handle, an would rather avoid.
For example, the `guice` package which shows up in the classpath
includes a JAR named `guice-4.2.2-no_aop.jar`. The issue with that is
that there is no corresponding POM in the directory:
https://repo1.maven.org/maven2/com/google/inject/guice/4.2.2/
Either we have to make a special case for such packages, or we can just
skip POMs entirely and avoid the mess.
Signed-off-by: Jakub Sokołowski <jakub@status.im>
This commit adds a custom linter to verify i18n/label is called with a qualified
keyword, like :t/foo. More sophisticated linters are possible too.
We also set the stage for other developers to consider more lint automation
instead of manually reviewing conventions in PRs.
If you want to understand how to write custom linters, check out
https://github.com/clj-kondo/clj-kondo/blob/master/doc/hooks.md. You can fire
the Clojure JVM REPL in status-mobile and play with the clj-kondo hook too, it
works beautifully.
Why do we care? By making sure all translation keywords are qualified with "t",
it is trivial to grep or replace them because they're unique in the repo, and
can't be confused with other words if you search by ":t/<something>".
Note: It's a best practice to commit clj-kondo configuration from external
libraries in the .clj-kondo directory. The directory .clj-kondo/babashka is
auto-generated, that's why it was added.
Fixes partially #15595
In order to build less targets, when not needed we introduce this
mapping logic.
If only specific ABI is required - status-go will have the same
arhitecuture.
This commit implements the "gradient cover" component which is needed for wallet screen development, and upgrades the "react-native-linear-gradient" library to "v2.8.0".
Signed-off-by: Mohamed Javid <19339952+smohamedjavid@users.noreply.github.com>
This commit upgrades Shadow CLJS from 2.11.16 (released on Feb/21) to latest
2.25.0 (Jul/23), so ~1.5 years worth of upgrades. By upgrading shadow we
can finally use the latest major Clojure version 1.11.x.
Why upgrade shadow?
- Shadow CLJS controls the ClojureScript version we can use. In order to use the
latest major Clojure version we must upgrade Shadow CLJS.
- Shadow CLJS releases new versions very frequently, and if you take a look at
its changelog https://github.com/thheller/shadow-cljs/blob/master/CHANGELOG.md, you'll see
it had tons and tons of bug fixes over the years. I hope some of them help
improve the DX for certain contributors who recently reported issues with
it.
- Clojure 1.11 brings new features, bug fixes and even performance improvements
(although I think the performance mostly impacts Clojure on the JVM). See the
changelog https://github.com/clojure/clojure/blob/master/changes.md#changes-to-clojure-in-version-1110
Things that can be beneficial to us, or are interesting nonetheless:
- New :as-alias to be used in require, which is like :as but does not require
the namespace to load. This means namespaced keywords using :as-alias can't
cause circular dependency errors. This feature would very useful if we used
namespaced keywords, but we don't, so...
https://github.com/clojure/clojure/blob/master/changes.md#22-as-alias-in-require
- New macros run-test and run-test-var to run single test with fixtures and
report.
- New iteration function, useful for processing paginated data.
https://www.abhinavomprakash.com/posts/clojure-iteration/
- New update-keys function: applies a function to every key in a map.
- New update-vals function: applies a function to every value in a map.
Examples for update-vals and update-keys. They should perform better than the
common reduce-kv approach since they use a transient data structure.
(let [m {:a 1 :b 2}]
(update-vals m inc)) ; => {:a 2, :b 3}
(let [m {:a 1 :b 2}]
(update-keys m name)) ; => {"a" 1, "b" 2}
Why change namespaces within __tests__ directories?
Any namespace with the word --tests-- throws an error, like the one below. I
didn't bother investigating why, so I changed the guidelines to reflect the new
convention. It's probably related to the double dashes in the name.
Namespace quo2.components.dividers.--tests--.divider-label-component-spec has a
segment starting with an invalid JavaScript identifier at line 1
watchman was upgraded significantly during the last #14944 (4.9.0 (Aug 16, 2017) to 2023.01.30.00 - 6 years between):
status-im/nixpkgs@4e9c02b
Probably causing developers to have "too many files open" issue #16341
This PR is an attempt to fix the issue by downgrading the watchman
Signed-off-by: Jakub Sokołowski <jakub@status.im>
Otherwise if in Nix context we can accidentally use GNU stat which
results in a different output due to different command line flags:
```
[nix-shell:~/status-mobile]$ stat -Lf "%Sg" "/nix/store"
stat: cannot read file system information for '%Sg': No such file or directory
File: "/nix/store"
ID: 10000110000001a Namelen: ? Type: apfs
Block size: 4096 Fundamental block size: 4096
Blocks: Total: 242837545 Free: 199242283 Available: 199242283
Inodes: Total: 7971454780 Free: 7969691320
```
And it should be just owner group name or ID. Which in turn results in:
```
Unknown Nix installtion type!
```
Signed-off-by: Jakub Sokołowski <jakub@status.im>
Android SDK in nixpkg doesn't support `aarch64-darwin`, for details see
https://github.com/status-im/status-mobile/issues/12794
The workaround was to run terminal application with Rosetta or make with `aarch` tool.
This PR overrides system architecture to always be `x86_64` for Android shell and build targets ran by make.
CI is not affected as it runs `nix` directly.
Signed-off-by: Jakub Sokołowski <jakub@status.im>
On macOS `git-lfs` checks fail sometimes and they also take a lot of time to execute.
```log
FAIL github.com/git-lfs/git-lfs/v3/lfshttp 0.820s
FAIL
error: builder for '/nix/store/abd6spw876qvcmlpcwsljsnbpbnvx1fg-git-lfs-3.3.0.drv' failed with exit code 1;
last 10 log lines:
> Error Trace: certs_test.go:210
> Error: Expected value not to be nil.
> Test: TestCertFromSSLCAPathEnv
> certs_test.go:210:
> Error Trace: certs_test.go:210
> Error: Expected value not to be nil.
> Test: TestCertFromSSLCAPathEnv
> FAIL
> FAIL github.com/git-lfs/git-lfs/v3/lfshttp 0.820s
> FAIL
For full logs, run 'nix-store -l /nix/store/abd6spw876qvcmlpcwsljsnbpbnvx1fg-git-lfs-3.3.0.drv'.
```
Failures initially observed by me and @smohamedjavid and then today again reported by @yqrashawn
This commit adds a `nix` overlay that skips those checks
This is a workaround for a well known issue of Nix failing to download
bigger packages from Nix cache due to errors like this:
```
HTTP error 200 (curl error: Transferred a partial file)
```
or
```
HTTP error 200 (curl error: Stream error in the HTTP/2 framing layer)
```
From docs: https://nixos.org/manual/nix/stable/command-ref/conf-file.html#conf-fallback
>If set to true, Nix will fall back to building from source if a binary
>substitute fails. This is equivalent to the --fallback flag. The default is false.
Realted: https://github.com/status-im/infra-ci/issues/17
Signed-off-by: Jakub Sokołowski <jakub@status.im>
Fixes following error:
```
ld: framework not found IOKit
clang-11: error: linker command failed with exit code 1 (use -v to see invocation)
make[1]: *** [status_nodejs_addon.target.mk:175: Release/status_nodejs_addon.node] Error 1
```
The `make test` target started to fail on macOS after #14944.
This PR adds 2 Apple SDK frameworks to default shell: `IOKit` and `CoreServices`
The other 2 mentioned in `binding.gyp` are not added, but build is ok.
Resolves: https://github.com/status-im/status-mobile/issues/16356
Signed-off-by: Jakub Sokołowski <jakub@status.im>
Siddarth Kumar
Jakub Sokołowski
Lungu Cristian
Icaro Motta
Anton Iakimov
Dmitri Akatov
yqrashawn
Ibrahem Khalil
Vitaliy Vlasov
Andrea Maria Piana
Mohamed Javid