January of 2022

Computer Science⚑

CICD⚑

Github Actions⚑

• New: Store file as a secret.

  If you want to store a file (multiline, binary...) as a secret, first encode it with base64:

  base64 -i < {{ file_path }} | tr -d '\n' | xclip -i -selection clipboard
  

  Then paste it to a new secret. To restore the file diring the workflow, add:

  - name: restore file
    run: echo ${{ secrets.SECRET }} | base64 -d > {{ file_path }}
  

• New: Conditional execution.

  To allow a step to fail without that implying failing the whole workflow and then execute some steps according to the result, do:

  - name: commitizen
    id: commitizen
    continue-on-error: true
    uses: commitizen-tools/commitizen-action@0.11.0
    with:
      github_token: ${{ secrets.GITHUB_TOKEN }}
  
  - name: Some other task
    if: steps.commitizen.outcome == 'success'
    run: something
  

GNULinux⚑

Android⚑

• New: Automatic version code generation.

  If you use semantic versioning and you don't want to increment the version code manually, replace the related config from android/app/build.gradle with:

  def flutterVersionName = localProperties.getProperty('flutter.versionName')
  if (flutterVersionName == null) {
      flutterVersionName = '1.0.0'
  }
  
  def semanticVersion = flutterVersionName.split('\\+')
  def versionCore = semanticVersion[0]
  def build = semanticVersion.length >= 2 ? semanticVersion[1].toInteger() : 0
  def (major, minor, patch) = versionCore.tokenize('.').collect{it.toInteger()}
  def flutterVersionCode = 1000000 * major + 10000 * minor + 100 * patch + build
  

  Then whenever pubspec.yaml version veriable changes and you build an APK or appbundle, the version code will be generated from it.

  Examples (version name -> version code):

  • 1.2.0 -> 1020000
  • 3.0.1+99 -> 3000199

• New: Signing the APK/AppBundle.

  First of all, create a key if you don't have one with:

  keytool -genkey -v -keystore {{ keystore_file }} -alias {{ key_alias }} \
    -keyalg RSA -keysize 4096 -validity 10000
  

  Replace signingConfigs with:

    signingConfigs {
         release {
          keyAlias "$System.env.KEY_ALIAS"
          keyPassword "$System.env.KEY_PASSWORD"
          storeFile file("$System.env.KEY_PATH")
          storePassword "$System.env.STORE_PASSWORD"
      }
     }
     buildTypes {
         release {
             signingConfig signingConfigs.release
         }
     }
  

  Now, you can set the corresponding environment variables. This configuration is particularily useful if you want to have a CI build and sign the releases.

  Check store file as secret to save the generated keystore file as a CI secret.

Makefile⚑

• New: Paralelize steps.

  Add the following lines to the beginning of the Makefile:

  NPROCS = $(shell grep -c 'processor' /proc/cpuinfo)
  MAKEFLAGS += -j$(NPROCS)
  

neovim⚑

• New: Add install instructions.

  To install the latest stable release, do:

  curl -sSL "https://github.com/neovim/neovim/releases/download/stable/nvim-linux64.tar.gz" | \
    tar -C "${HOME}/.local" -xz --strip-components=1 -f -
  

Profanity⚑

• New: Most common commands.

  • \msg {user@server.tld}: Start a conversation.
  • \roster add {user@server.tld}: Add user to contacts.
  • \sub request {user@server.tld}: Request presence updates from user.
  • \omemo start: Start an OMEMO session.

Wallabag⚑

• New: Block all feeds except starred.

  location ~ /feed/sgn/{token}/(?!starred) {
     deny all;
     return 403;
    }
  

• Correction: Missing placeholder.

Programming⚑

Material⚑

• New: InkWell.

  Make a component clickable (with animations onf hover and tap):

  InkWell(
      onTap: () {
        // To do
      },
      child: Card(),
  )
  

Provider⚑

• New: Flutter Provider.

  A relatively simple and efficient tool for state management in Flutter is provider.

Other⚑

• New: Flutter commnad version.

  flutter --version: See Flutter and Dart version.

• New: Enum.

  enum Day { monday, tuesday }
  

  Get the value of an enum element:

  Day.monday.name
  

• New: If null operator (??).

  Get a default value if object is null:

  var value;
  ...
  value = value ?? 2;
  

• New: Request a new certificate.

  If there is no HTTP sever running:

  certbot certonly --standalone --preferred-challenges http-01 -d {{ domain }} --register-unsafely-without-email --agree-tos -n
  

  If there is an HTTP running:

  certonly --webroot -w {{ web_path_letsencrypt }} --preferred-challenges http-01 -d {{ domain }} --register-unsafely-without-email --agree-tos -n
  

• Correction: Add missing entries to nav.

• New: Upload to Play Store with CI.

  1. Create a principal in https://console.cloud.google.com/iam-admin/iam with the role Service Account User.
  2. Create and download a new key (JSON format) for the created principal.
  3. In Play Console go to Setup>API access and enable access for the created principal granting Admin (all permissions) to it.
  4. Add the key JSON content as a GitHub Secret (e.g., SERVICE_ACCOUNT_JSON).
  5. Add the following step to your workflow (after flutter build appbundle):

  - name: Upload to Google Play
    uses: r0adkll/upload-google-play@v1.0.15
    with:
      serviceAccountJsonPlainText: ${{ secrets.SERVICE_ACCOUNT_JSON }}
      packageName: {{ package_name }}
      releaseFiles: build/app/outputs/bundle/release/app-release.aab
      track: production