image build process improvements (#1045)

* auto-generate .env.production file

* env placeholders congruity check

* refactor yarn dev and docker tasks

* [skip ci] pass git tag and commit sha to dev app

* [skip ci] clean up

.env.example

@@ -3,4 +3,5 @@ SENTRY_CSP_REPORT_URI=xxx
 NEXT_PUBLIC_WALLET_CONNECT_PROJECT_ID=xxx
 NEXT_PUBLIC_RE_CAPTCHA_APP_SITE_KEY=xxx
 NEXT_PUBLIC_GOOGLE_ANALYTICS_PROPERTY_ID=UA-XXXXXX-X
-NEXT_PUBLIC_MIXPANEL_PROJECT_TOKEN=xxx
+NEXT_PUBLIC_MIXPANEL_PROJECT_TOKEN=xxx
\ No newline at end of file
+NEXT_PUBLIC_AUTH0_CLIENT_ID=xxx
\ No newline at end of file

.env.template

-# app config
-NEXT_PUBLIC_APP_ENV=__PLACEHOLDER_FOR_NEXT_PUBLIC_APP_ENV__
-NEXT_PUBLIC_APP_INSTANCE=__PLACEHOLDER_FOR_NEXT_PUBLIC_APP_INSTANCE__
-NEXT_PUBLIC_APP_PROTOCOL=__PLACEHOLDER_FOR_NEXT_PUBLIC_APP_PROTOCOL__
-NEXT_PUBLIC_APP_HOST=__PLACEHOLDER_FOR_NEXT_PUBLIC_APP_HOST__
-NEXT_PUBLIC_APP_PORT=__PLACEHOLDER_FOR_NEXT_PUBLIC_APP_PORT__
-NEXT_PUBLIC_AUTH_URL=__PLACEHOLDER_FOR_NEXT_PUBLIC_AUTH_URL__
-
-# version config
-NEXT_PUBLIC_GIT_COMMIT_SHA=__PLACEHOLDER_FOR_NEXT_PUBLIC_GIT_COMMIT_SHA__
-NEXT_PUBLIC_GIT_TAG=__PLACEHOLDER_FOR_NEXT_PUBLIC_GIT_TAG__
-
-# network config
-NEXT_PUBLIC_NETWORK_NAME=__PLACEHOLDER_FOR_NEXT_PUBLIC_NETWORK_NAME__
-NEXT_PUBLIC_NETWORK_SHORT_NAME=__PLACEHOLDER_FOR_NEXT_PUBLIC_NETWORK_SHORT_NAME__
-NEXT_PUBLIC_NETWORK_LOGO=__PLACEHOLDER_FOR_NEXT_PUBLIC_NETWORK_LOGO__
-NEXT_PUBLIC_NETWORK_LOGO_DARK=__PLACEHOLDER_FOR_NEXT_PUBLIC_NETWORK_LOGO_DARK__
-NEXT_PUBLIC_NETWORK_ICON=__PLACEHOLDER_FOR_NEXT_PUBLIC_NETWORK_ICON__
-NEXT_PUBLIC_NETWORK_ICON_DARK=__PLACEHOLDER_FOR_NEXT_PUBLIC_NETWORK_ICON_DARK__
-NEXT_PUBLIC_NETWORK_ASSETS_PATHNAME=__PLACEHOLDER_FOR_NEXT_PUBLIC_NETWORK_ASSETS_PATHNAME__
-NEXT_PUBLIC_NETWORK_ID=__PLACEHOLDER_FOR_NEXT_PUBLIC_NETWORK_ID__
-NEXT_PUBLIC_NETWORK_CURRENCY_NAME=__PLACEHOLDER_FOR_NEXT_PUBLIC_NETWORK_CURRENCY_NAME__
-NEXT_PUBLIC_NETWORK_CURRENCY_SYMBOL=__PLACEHOLDER_FOR_NEXT_PUBLIC_NETWORK_CURRENCY_SYMBOL__
-NEXT_PUBLIC_NETWORK_CURRENCY_DECIMALS=__PLACEHOLDER_FOR_NEXT_PUBLIC_NETWORK_CURRENCY_DECIMALS__
-NEXT_PUBLIC_NETWORK_TOKEN_ADDRESS=__PLACEHOLDER_FOR_NEXT_PUBLIC_NETWORK_TOKEN_ADDRESS__
-NEXT_PUBLIC_IS_ACCOUNT_SUPPORTED=__PLACEHOLDER_FOR_NEXT_PUBLIC_IS_ACCOUNT_SUPPORTED__
-NEXT_PUBLIC_NETWORK_VERIFICATION_TYPE=__PLACEHOLDER_FOR_NEXT_PUBLIC_NETWORK_VERIFICATION_TYPE__
-NEXT_PUBLIC_NETWORK_RPC_URL=__PLACEHOLDER_FOR_NEXT_PUBLIC_NETWORK_RPC_URL__
-NEXT_PUBLIC_IS_TESTNET=__PLACEHOLDER_FOR_NEXT_PUBLIC_IS_TESTNET__
-
-# ui config
-NEXT_PUBLIC_FEATURED_NETWORKS=__PLACEHOLDER_FOR_NEXT_PUBLIC_FEATURED_NETWORKS__
-NEXT_PUBLIC_FOOTER_LINKS=__PLACEHOLDER_FOR_NEXT_PUBLIC_FOOTER_LINKS__
-NEXT_PUBLIC_NETWORK_EXPLORERS=__PLACEHOLDER_FOR_NEXT_PUBLIC_NETWORK_EXPLORERS__
-NEXT_PUBLIC_OTHER_LINKS=__PLACEHOLDER_FOR_NEXT_PUBLIC_OTHER_LINKS__
-NEXT_PUBLIC_MARKETPLACE_CONFIG_URL=__PLACEHOLDER_FOR_NEXT_PUBLIC_MARKETPLACE_CONFIG_URL__
-NEXT_PUBLIC_MARKETPLACE_SUBMIT_FORM=__PLACEHOLDER_FOR_NEXT_PUBLIC_MARKETPLACE_SUBMIT_FORM__
-NEXT_PUBLIC_LOGOUT_URL=__PLACEHOLDER_FOR_NEXT_PUBLIC_LOGOUT_URL__
-NEXT_PUBLIC_HOMEPAGE_CHARTS=__PLACEHOLDER_FOR_NEXT_PUBLIC_HOMEPAGE_CHARTS__
-NEXT_PUBLIC_HOMEPAGE_PLATE_TEXT_COLOR=__PLACEHOLDER_FOR_NEXT_PUBLIC_HOMEPAGE_PLATE_TEXT_COLOR__
-NEXT_PUBLIC_HOMEPAGE_PLATE_BACKGROUND=__PLACEHOLDER_FOR_NEXT_PUBLIC_HOMEPAGE_PLATE_BACKGROUND__
-NEXT_PUBLIC_HOMEPAGE_SHOW_GAS_TRACKER=__PLACEHOLDER_FOR_NEXT_PUBLIC_HOMEPAGE_SHOW_GAS_TRACKER__
-NEXT_PUBLIC_HOMEPAGE_SHOW_AVG_BLOCK_TIME=__PLACEHOLDER_FOR_NEXT_PUBLIC_HOMEPAGE_SHOW_AVG_BLOCK_TIME__
-NEXT_PUBLIC_AD_ADBUTLER_CONFIG_DESKTOP=__PLACEHOLDER_FOR_NEXT_PUBLIC_AD_ADBUTLER_CONFIG_DESKTOP__
-NEXT_PUBLIC_AD_ADBUTLER_CONFIG_MOBILE=__PLACEHOLDER_FOR_NEXT_PUBLIC_AD_ADBUTLER_CONFIG_MOBILE__
-NEXT_PUBLIC_AD_BANNER_PROVIDER=__PLACEHOLDER_FOR_NEXT_PUBLIC_AD_BANNER_PROVIDER__
-NEXT_PUBLIC_AD_TEXT_PROVIDER=__PLACEHOLDER_FOR_NEXT_PUBLIC_AD_TEXT_PROVIDER__
-NEXT_PUBLIC_GRAPHIQL_TRANSACTION=__PLACEHOLDER_FOR_NEXT_PUBLIC_GRAPHIQL_TRANSACTION__
-NEXT_PUBLIC_WEB3_DEFAULT_WALLET=__PLACEHOLDER_FOR_NEXT_PUBLIC_WEB3_DEFAULT_WALLET__
-NEXT_PUBLIC_WEB3_DISABLE_ADD_TOKEN_TO_WALLET=__PLACEHOLDER_FOR_NEXT_PUBLIC_WEB3_DISABLE_ADD_TOKEN_TO_WALLET__
-NEXT_PUBLIC_HIDE_INDEXING_ALERT=__PLACEHOLDER_FOR_NEXT_PUBLIC_HIDE_INDEXING_ALERT__
-
-# api config
-NEXT_PUBLIC_API_HOST=__PLACEHOLDER_FOR_NEXT_PUBLIC_API_HOST__
-NEXT_PUBLIC_API_BASE_PATH=__PLACEHOLDER_FOR_NEXT_PUBLIC_API_BASE_PATH__
-NEXT_PUBLIC_API_PROTOCOL=__PLACEHOLDER_FOR_NEXT_PUBLIC_API_PROTOCOL__
-NEXT_PUBLIC_API_PORT=__PLACEHOLDER_FOR_NEXT_PUBLIC_API_PORT__
-NEXT_PUBLIC_API_WEBSOCKET_PROTOCOL=__PLACEHOLDER_FOR_NEXT_PUBLIC_API_WEBSOCKET_PROTOCOL__
-NEXT_PUBLIC_STATS_API_HOST=__PLACEHOLDER_FOR_NEXT_PUBLIC_STATS_API_HOST__
-NEXT_PUBLIC_VISUALIZE_API_HOST=__PLACEHOLDER_FOR_NEXT_PUBLIC_VISUALIZE_API_HOST__
-NEXT_PUBLIC_CONTRACT_INFO_API_HOST=__PLACEHOLDER_FOR_NEXT_PUBLIC_CONTRACT_INFO_API_HOST__
-NEXT_PUBLIC_ADMIN_SERVICE_API_HOST=__PLACEHOLDER_FOR_NEXT_PUBLIC_ADMIN_SERVICE_API_HOST__
-NEXT_PUBLIC_API_SPEC_URL=__PLACEHOLDER_FOR_NEXT_PUBLIC_API_SPEC_URL__
-
-# external services config
-NEXT_PUBLIC_SENTRY_DSN=__PLACEHOLDER_FOR_NEXT_PUBLIC_SENTRY_DSN__
-NEXT_PUBLIC_AUTH0_CLIENT_ID=__PLACEHOLDER_FOR_NEXT_PUBLIC_AUTH0_CLIENT_ID__
-NEXT_PUBLIC_WALLET_CONNECT_PROJECT_ID=__PLACEHOLDER_FOR_NEXT_PUBLIC_WALLET_CONNECT_PROJECT_ID__
-NEXT_PUBLIC_RE_CAPTCHA_APP_SITE_KEY=__PLACEHOLDER_FOR_NEXT_PUBLIC_RE_CAPTCHA_APP_SITE_KEY__
-NEXT_PUBLIC_GOOGLE_ANALYTICS_PROPERTY_ID=__PLACEHOLDER_FOR_NEXT_PUBLIC_GOOGLE_ANALYTICS_PROPERTY_ID__
-NEXT_PUBLIC_MIXPANEL_PROJECT_TOKEN=__PLACEHOLDER_FOR_NEXT_PUBLIC_MIXPANEL_PROJECT_TOKEN__
-
-# l2 config
-NEXT_PUBLIC_IS_L2_NETWORK=__PLACEHOLDER_FOR_NEXT_PUBLIC_IS_L2_NETWORKL__
-NEXT_PUBLIC_L1_BASE_URL=__PLACEHOLDER_FOR_NEXT_PUBLIC_L1_BASE_URL__
-NEXT_PUBLIC_L2_WITHDRAWAL_URL=__PLACEHOLDER_FOR_NEXT_PUBLIC_L2_WITHDRAWAL_URL__
-
-# beacon chain config
-NEXT_PUBLIC_HAS_BEACON_CHAIN=__PLACEHOLDER_FOR_NEXT_PUBLIC_HAS_BEACON_CHAIN__
-NEXT_PUBLIC_BEACON_CHAIN_CURRENCY_SYMBOL=__PLACEHOLDER_FOR_NEXT_PUBLIC_BEACON_CHAIN_CURRENCY_SYMBOL__

.eslintignore

 node_modules
 node_modules_linux
 
-playwright/envs.js
+playwright/envs.js
\ No newline at end of file
+deploy/tools/envs-validator/index.js
\ No newline at end of file

.gitignore

@@ -3,7 +3,6 @@
 # dependencies
 /node_modules
 /node_modules_linux
-/**/node_modules
 /.pnp
 .pnp.js
 
@@ -48,9 +47,4 @@ yarn-error.log*
 /playwright/.browser/
 /playwright/envs.js
 
-**.dec**
-
+**.dec**
\ No newline at end of file
-# tools: envs-validator
-/deploy/tools/envs-validator/index.js
-/deploy/tools/envs-validator/envs.ts
-/deploy/tools/envs-validator/schema.ts
\ No newline at end of file

.vscode/tasks.json

@@ -6,7 +6,7 @@
         // DEV SERVER
         {
             "type": "shell",
-            "command": "yarn dev:${input:devServerConfig}",
+            "command": "yarn dev:preset ${input:dev_config_preset}",
             "problemMatcher": [],
             "label": "dev server",
             "detail": "start local dev server",
@@ -243,11 +243,11 @@
             }
         },
         {
-            "type": "npm",
-            "script": "start:docker:poa_core",
+            "type": "shell",
+            "command": "yarn start:docker:preset ${input:dev_config_preset}",
             "problemMatcher": [],
-            "label": "docker: run poa",
-            "detail": "run docker container for POA network",
+            "label": "docker: run",
+            "detail": "run docker container with env preset",
             "presentation": {
                 "reveal": "always",
                 "panel": "shared",
@@ -311,17 +311,17 @@
         },
         {
             "type": "pickString",
-            "id": "devServerConfig",
-            "description": "Choose dev server config:",
+            "id": "dev_config_preset",
+            "description": "Choose dev server config preset:",
             "options": [
               "main",
-              "main:L2",
+              "main.L2",
               "poa_core",
               "eth_goerli",
               "eth",
               "localhost",
             ],
-            "default": ""
+            "default": "main"
         },
     ],
 }
\ No newline at end of file

Dockerfile

@@ -5,58 +5,72 @@ FROM node:18-alpine AS deps
 # Check https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine to understand why libc6-compat might be needed.
 RUN apk add --no-cache libc6-compat
 
-# Install dependencies for App
+### APP
+# Install dependencies
 WORKDIR /app
 COPY package.json yarn.lock ./
 RUN apk add git
 RUN yarn --frozen-lockfile
 
-# Install dependencies for ENVs checker
+### ENV VARIABLES CHECKER
+# Install dependencies
 WORKDIR /envs-validator
 COPY ./deploy/tools/envs-validator/package.json ./deploy/tools/envs-validator/yarn.lock ./
 RUN yarn --frozen-lockfile
 
+
 # *****************************
 # ****** STAGE 2: Build *******
 # *****************************
 FROM node:18-alpine AS builder
+RUN apk add --no-cache --upgrade libc6-compat bash
 
-# Build app for production
+# pass commit sha and git tag to the app image
+ARG GIT_COMMIT_SHA
+ENV NEXT_PUBLIC_GIT_COMMIT_SHA=$GIT_COMMIT_SHA
+ARG GIT_TAG
+ENV NEXT_PUBLIC_GIT_TAG=$GIT_TAG
+
+ENV NODE_ENV production
+
+### APP
+# Copy dependencies and source code
 WORKDIR /app
 COPY --from=deps /app/node_modules ./node_modules
 COPY . .
-COPY .env.template .env.production
-RUN rm -rf ./deploy/tools/envs-validator
+
+# Generate .env.production with ENVs placeholders and save build args into .env file
+COPY --chmod=+x ./deploy/scripts/make_envs_template.sh ./
+RUN ./make_envs_template.sh ./docs/ENVS.md
 
 # Next.js collects completely anonymous telemetry data about general usage.
 # Learn more here: https://nextjs.org/telemetry
 # Uncomment the following line in case you want to disable telemetry during the build.
 # ENV NEXT_TELEMETRY_DISABLED 1
+
+# Build app for production
 RUN yarn build
 
-# Build ENVs checker
+
+### ENV VARIABLES CHECKER
+# Copy dependencies and source code, then build 
 WORKDIR /envs-validator
 COPY --from=deps /envs-validator/node_modules ./node_modules
 COPY ./deploy/tools/envs-validator .
 COPY ./types/envs.ts .
 RUN yarn build
 
+
 # *****************************
 # ******* STAGE 3: Run ********
 # *****************************
 # Production image, copy all the files and run next
 FROM node:18-alpine AS runner
-WORKDIR /app
-
-# pass commit sha to the app (uses by sentry.io as release version)
-ARG GIT_COMMIT_SHA
-ENV NEXT_PUBLIC_GIT_COMMIT_SHA=$GIT_COMMIT_SHA
+RUN apk add --no-cache --upgrade bash
 
-# pass git tag to the app (for the footer link)
-ARG GIT_TAG
-ENV NEXT_PUBLIC_GIT_TAG=$GIT_TAG
+### APP
+WORKDIR /app
 
-ENV NODE_ENV production
 # Uncomment the following line in case you want to disable telemetry during runtime.
 # ENV NEXT_TELEMETRY_DISABLED 1
 
@@ -68,20 +82,17 @@ COPY --from=builder /app/public ./public
 COPY --from=builder /app/package.json ./package.json
 COPY --from=builder /envs-validator/index.js ./envs-validator.js
 
-# Copy scripts and ENV templates file
-COPY ./deploy/scripts/entrypoint.sh .
-COPY ./deploy/scripts/replace_envs.sh .
-COPY .env.template .
+# Copy scripts and ENVs file
+COPY --chmod=+x ./deploy/scripts/entrypoint.sh .
+COPY --chmod=+x ./deploy/scripts/replace_envs.sh .
+COPY --from=builder /app/.env.production .
+COPY --from=builder /app/.env .
 
 # Automatically leverage output traces to reduce image size
 # https://nextjs.org/docs/advanced-features/output-file-tracing
 COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
 COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
 
-RUN apk add --no-cache --upgrade bash
-RUN ["chmod", "+x", "./entrypoint.sh"]
-RUN ["chmod", "+x", "./replace_envs.sh"]
-
 ENTRYPOINT ["./entrypoint.sh"]
 
 USER nextjs

configs/envs/.env.eth_goerli

@@ -26,13 +26,14 @@ NEXT_PUBLIC_NETWORK_CURRENCY_SYMBOL=ETH
 NEXT_PUBLIC_NETWORK_CURRENCY_DECIMALS=18
 NEXT_PUBLIC_NETWORK_TOKEN_ADDRESS=0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2
 NEXT_PUBLIC_IS_ACCOUNT_SUPPORTED=true
+NEXT_PUBLIC_AUTH_URL=http://localhost:3000
+NEXT_PUBLIC_LOGOUT_URL=https://blockscoutcom.us.auth0.com/v2/logout
 NEXT_PUBLIC_NETWORK_VERIFICATION_TYPE=validation
 NEXT_PUBLIC_NETWORK_RPC_URL=https://rpc.ankr.com/eth_goerli
 NEXT_PUBLIC_MARKETPLACE_CONFIG_URL=https://raw.githubusercontent.com/blockscout/frontend-configs/dev/configs/marketplace/eth-goerli.json
 NEXT_PUBLIC_MARKETPLACE_SUBMIT_FORM=https://airtable.com/shrqUAcjgGJ4jU88C
 NEXT_PUBLIC_HOMEPAGE_CHARTS=['daily_txs']
 NEXT_PUBLIC_IS_TESTNET=true
-NEXT_PUBLIC_HAS_BEACON_CHAIN=false
 
 # api config
 NEXT_PUBLIC_API_HOST=eth-goerli.blockscout.com

configs/envs/.env.main

@@ -26,13 +26,14 @@ NEXT_PUBLIC_NETWORK_CURRENCY_SYMBOL=ETH
 NEXT_PUBLIC_NETWORK_CURRENCY_DECIMALS=18
 NEXT_PUBLIC_NETWORK_TOKEN_ADDRESS=0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2
 NEXT_PUBLIC_IS_ACCOUNT_SUPPORTED=true
+NEXT_PUBLIC_AUTH_URL=http://localhost:3000
+NEXT_PUBLIC_LOGOUT_URL=https://blockscoutcom.us.auth0.com/v2/logout
 NEXT_PUBLIC_NETWORK_VERIFICATION_TYPE=validation
 NEXT_PUBLIC_NETWORK_RPC_URL=https://rpc.ankr.com/eth_goerli
 NEXT_PUBLIC_MARKETPLACE_CONFIG_URL=https://raw.githubusercontent.com/blockscout/frontend-configs/dev/configs/marketplace/eth-goerli.json
 NEXT_PUBLIC_MARKETPLACE_SUBMIT_FORM=https://airtable.com/shrqUAcjgGJ4jU88C
 NEXT_PUBLIC_HOMEPAGE_CHARTS=['daily_txs']
 NEXT_PUBLIC_IS_TESTNET=true
-NEXT_PUBLIC_HAS_BEACON_CHAIN=false
 
 # api config
 NEXT_PUBLIC_API_HOST=blockscout-main.k8s-dev.blockscout.com

deploy/scripts/entrypoint.sh

@@ -3,7 +3,7 @@
 # Check run-time ENVs values integrity
 node "$(dirname "$0")/envs-validator.js" "$input"
 if [ $? != 0 ]; then                   
-   echo ENV integrity check failed. 1>&2 && exit 1
+   echo 🛑 ENV integrity check failed. 1>&2 && exit 1
 fi
 
 # Execute script for replace build-time ENVs placeholders with their values at runtime

deploy/scripts/make_envs_template.sh

+#!/bin/bash
+
+# Check if the number of arguments provided is correct
+if [ "$#" -ne 1 ]; then
+  echo "Usage: $0 <input_file>"
+  exit 1
+fi
+
+input_file="$1"
+prefix="NEXT_PUBLIC_"
+
+# Function to make the environment variables template file
+# It will read the input file, extract all prefixed string and use them as variables names
+# This variables will have placeholders for their values at buildtime which will be replaced with actual values at runtime
+make_envs_template_file() {
+  output_file=".env.production"
+
+  # Check if file already exists and empty its content if it does
+  if [ -f "$output_file" ]; then
+    > "$output_file"
+  fi
+
+  grep -oE "${prefix}[[:alnum:]_]+" "$input_file" | sort -u | while IFS= read -r var_name; do
+    echo "$var_name=__PLACEHOLDER_FOR_${var_name}__" >> "$output_file"
+  done
+}
+
+# Function to save build-time environment variables to .env file
+save_build-time_envs() {
+  output_file=".env"
+
+  # Check if file already exists and empty its content if it does or create a new one
+  if [ -f "$output_file" ]; then
+    > "$output_file"
+  else
+    touch "$output_file"
+  fi
+
+  env | grep "^${prefix}" | while IFS= read -r line; do
+    echo "$line" >> "$output_file"
+  done
+}
+
+make_envs_template_file
+save_build-time_envs
\ No newline at end of file

deploy/scripts/replace_envs.sh

@@ -3,7 +3,7 @@
 set +x
 
 # config
-envFilename='.env.template'
+envFilename='.env.production'
 nextFolder='./.next/'
 
 # replacing build-stage ENVs with run-stage ENVs

deploy/tools/envs-validator/.gitignore

+/node_modules
+.env
+.env.production
+index.js
+envs.ts
+schema.ts
\ No newline at end of file

deploy/tools/envs-validator/dev.sh

+#!/bin/bash
+
+cp ../../../types/envs.ts .
+export NEXT_PUBLIC_GIT_COMMIT_SHA=$(git rev-parse --short HEAD)
+export NEXT_PUBLIC_GIT_TAG=$(git describe --tags --abbrev=0)
+../../scripts/make_envs_template.sh ../../../docs/ENVS.md
+yarn build
+dotenv -e ../../../configs/envs/.env.main -e ../../../configs/envs/.env.secrets yarn validate
\ No newline at end of file

deploy/tools/envs-validator/index.ts

 /* eslint-disable no-console */
+import fs from 'fs';
+import path from 'path';
 import type { ZodError } from 'zod-validation-error';
 import { fromZodError } from 'zod-validation-error';
 
 import { nextPublicEnvsSchema } from './schema';
 
-try {
-  const appEnvs = Object.entries(process.env)
-    .filter(([ key ]) => key.startsWith('NEXT_PUBLIC_'))
-    .reduce((result, [ key, value ]) => {
-      result[key] = value || '';
-      return result;
-    }, {} as Record<string, string>);
-
-  console.log(`⏳ Validating environment variables schema...`);
-  nextPublicEnvsSchema.parse(appEnvs);
-  console.log('👍 All good!\n');
-} catch (error) {
-  const validationError = fromZodError(
-    error as ZodError,
-    {
-      prefix: '',
-      prefixSeparator: '\n  ',
-      issueSeparator: ';\n  ',
-    },
-  );
-  console.log(validationError);
-  console.log('🚨 ENV set is invalid\n');
-  process.exit(1);
+run();
+
+async function run() {
+  console.log();
+  try {
+    const appEnvs = Object.entries(process.env)
+      .filter(([ key ]) => key.startsWith('NEXT_PUBLIC_'))
+      .reduce((result, [ key, value ]) => {
+        result[key] = value || '';
+        return result;
+      }, {} as Record<string, string>);
+
+    await validateEnvsSchema(appEnvs);
+    await checkPlaceholdersCongruity(appEnvs);
+
+  } catch (error) {
+    process.exit(1);
+  }
+}
+
+async function validateEnvsSchema(appEnvs: Record<string, string>) {
+  try {
+    console.log(`⏳ Validating environment variables schema...`);
+    nextPublicEnvsSchema.parse(appEnvs);
+    console.log('👍 All good!\n');
+  } catch (error) {
+    const validationError = fromZodError(
+      error as ZodError,
+      {
+        prefix: '',
+        prefixSeparator: '\n  ',
+        issueSeparator: ';\n  ',
+      },
+    );
+    console.log(validationError);
+    console.log('🚨 Environment variables set is invalid.\n');
+
+    throw error;
+  }
+}
+
+async function checkPlaceholdersCongruity(runTimeEnvs: Record<string, string>) {
+  try {
+    console.log(`⏳ Checking environment variables and their placeholders congruity...`);
+
+    const placeholders = await getEnvsPlaceholders(path.resolve(__dirname, '.env.production'));
+    const buildTimeEnvs = await getEnvsPlaceholders(path.resolve(__dirname, '.env'));
+    const envs = Object.keys(runTimeEnvs).filter((env) => !buildTimeEnvs.includes(env));
+
+    const inconsistencies: Array<string> = [];
+    for (const env of envs) {
+      const hasPlaceholder = placeholders.includes(env);
+      if (!hasPlaceholder) {
+        inconsistencies.push(env);
+      }
+    }
+
+    if (inconsistencies.length > 0) {
+      console.log(`🚸 For the following environment variables placeholders were not generated at build-time:`);
+      inconsistencies.forEach((env) => {
+        console.log(`    ${ env }`);
+      });
+      console.log('They are either deprecated or running the app with them may lead to unexpected behavior. Please check the documentation for more details.');
+      throw new Error();
+    }
+
+    console.log('👍 All good!\n');
+  } catch (error) {
+    console.log('🚨 Congruity check failed.\n');
+    throw error;
+  }
+}
+
+function getEnvsPlaceholders(filePath: string): Promise<Array<string>> {
+  return new Promise((resolve, reject) => {
+    fs.readFile(filePath, 'utf8', (err, data) => {
+      if (err) {
+        console.log(`⛔ Unable to read placeholders file.`);
+        reject(err);
+        return;
+      }
+
+      const lines = data.split('\n');
+      const variables = lines.map(line => {
+        const variable = line.split('=')[0];
+        return variable.trim();
+      });
+
+      resolve(variables.filter(Boolean));
+    });
+  });
 }

deploy/tools/envs-validator/package.json

@@ -6,7 +6,7 @@
   "scripts": {
     "build": "yarn ts-to-zod ./envs.ts ./schema.ts && yarn webpack-cli -c ./webpack.config.js",
     "validate": "node ./index.js",
-    "dev": "cp ../../../types/envs.ts ./ && yarn build && yarn dotenv -e ../../../configs/envs/.env.poa_core yarn validate"
+    "dev": "./dev.sh"
   },
   "dependencies": {
     "ts-loader": "^9.4.4",

deploy/tools/envs-validator/tsconfig.json

 {
 	"compilerOptions": {
-		"target": "es6",
+		"target": "es2016",
 		"skipLibCheck": true,
 		"strict": true,
 		"esModuleInterop": true,

deploy/tools/envs-validator/webpack.config.js

 const path = require('path');
 module.exports = {
   mode: 'production',
+  target: 'node',
   entry: path.resolve(__dirname) + '/index.ts',
   module: {
     rules: [

docs/BUILD-TIME_ENVS.md

+# Build-time environment variables
+
+These variables are passed to the app during the image build process. They cannot be re-defined during the run-time.
+
+| Variable | Type | Description | Optional | Example value |
+| --- | --- | --- | --- | --- |
+| NEXT_PUBLIC_GIT_COMMIT_SHA | `string` | SHA of the latest commit in the branch from which image is build | false | `29d0613e` |
+| NEXT_PUBLIC_GIT_TAG | `string` | Git tag on the latest commit in the branch from which image is build | true | `v1.0.0` |
\ No newline at end of file

docs/CONTRIBUTING.md

@@ -58,16 +58,15 @@ For all types of dependencies:
 *Note*, if the variable should be exposed to the browser don't forget to add prefix `NEXT_PUBLIC_` to its name.
 
 These are the steps that you have to follow to make everything work:
-1. Register variable placeholder in file `.env.template`; this is the most important step, without this the app will not receive variable value at run-time
-2. Document variable in the [/docs/ENVS.md](./ENVS.md) file; provide short description, its expected type, requirement flag, default and example value
-3. Make sure that you have added a property to React app config (`/configs/app/config.ts`) that is associated with this variable; do not use ENV variable values directly in the application code
-4. For local development purposes add the variable with its appropriate values to pre-defined ENV configs `/configs/envs` where it is needed
-5. Add the variable to CI configs where it is needed
+1. First and foremost, document variable in the [/docs/ENVS.md](./ENVS.md) file; provide short description, its expected type, requirement flag, default and example value; **do not skip this step** otherwise the app will not receive variable value at run-time
+2. Make sure that you have added a property to React app config (`/configs/app/config.ts`) that is associated with this variable; do not use ENV variable values directly in the application code
+3. For local development purposes add the variable with its appropriate values to pre-defined ENV configs `/configs/envs` where it is needed
+4. Add the variable to CI configs where it is needed
     - `deploy/values/review/values.yaml.gotmpl` - review development environment
     - `deploy/values/main/values.yaml` - main development environment
     - `deploy/values/review-l2/values.yaml.gotmpl` - review development environment for L2 networks
     - `deploy/values/l2-optimism-goerli/values.yaml` - main development environment
-6. Don't forget to mention in the PR notes that new ENV variable were added  
+5. Don't forget to mention in the PR notes that new ENV variable were added  
 
 ## Writing & Running Tests
 
@@ -137,10 +136,10 @@ We have 3 pre-configured projects. You can run your test with the desired projec
 | --- | --- |
 | **Running and building** |
 | `yarn dev` | run local dev server with user's configuration |
-| `yarn dev:<config_name>` | run local dev server with predefined configuration |
+| `yarn dev:preset <config_preset_name>` | run local dev server with predefined configuration |
 | `yarn build:docker` | build a docker image locally |
 | `yarn start:docker:local` | start an application from previously built local docker image with user's configuration |
-| `yarn start:docker:poa_core` | start an application from previously built local docker image with predefined configuration for POA network explorer |
+| `yarn start:docker:preset <config_preset_name>` | start an application from previously built local docker image with predefined configuration |
 | **Linting and formatting** |
 | `yarn lint:eslint` | lint project files with ESLint |
 | `yarn lint:eslint:fix` | lint project files with ESLint and automatically fix problems |

docs/ENVS.md

-# Environment variables
+# Run-time environment variables
 
 The app instance could be customized by passing following variables to NodeJS environment at runtime. See their list below.
 

package.json

@@ -9,22 +9,17 @@
   },
   "scripts": {
     "dev": "next dev",
-    "dev:localhost": "./node_modules/.bin/dotenv -e ./configs/envs/.env.localhost -e ./configs/envs/.env.secrets -- bash -c 'next dev -- -p \"$NEXT_PUBLIC_APP_PORT\"' | ./node_modules/.bin/pino-pretty",
-    "dev:main": "./node_modules/.bin/dotenv -e ./configs/envs/.env.main -e ./configs/envs/.env.secrets -- bash -c 'next dev -- -p \"$NEXT_PUBLIC_APP_PORT\"' | ./node_modules/.bin/pino-pretty",
-    "dev:main:L2": "./node_modules/.bin/dotenv -e ./configs/envs/.env.main.L2 -e ./configs/envs/.env.secrets -- bash -c 'next dev -- -p \"$NEXT_PUBLIC_APP_PORT\"' | ./node_modules/.bin/pino-pretty",
-    "dev:poa_core": "./node_modules/.bin/dotenv -e ./configs/envs/.env.poa_core -e ./configs/envs/.env.secrets -- bash -c 'next dev -- -p \"$NEXT_PUBLIC_APP_PORT\"' | ./node_modules/.bin/pino-pretty",
-    "dev:eth_goerli": "./node_modules/.bin/dotenv -e ./configs/envs/.env.eth_goerli -e ./configs/envs/.env.secrets -- bash -c 'next dev -- -p \"$NEXT_PUBLIC_APP_PORT\"' | ./node_modules/.bin/pino-pretty",
-    "dev:eth": "./node_modules/.bin/dotenv -e ./configs/envs/.env.eth -e ./configs/envs/.env.secrets -- bash -c 'next dev -- -p \"$NEXT_PUBLIC_APP_PORT\"' | ./node_modules/.bin/pino-pretty",
+    "dev:preset": "./tools/scripts/dev.preset.sh",
     "build": "next build",
-    "build:docker": "docker build --build-arg GIT_COMMIT_SHA=$(git rev-parse HEAD) -t blockscout-frontend ./",
+    "build:docker": "docker build --build-arg GIT_COMMIT_SHA=$(git rev-parse --short HEAD) --build-arg GIT_TAG=$(git describe --tags --abbrev=0) -t blockscout-frontend ./",
     "start": "next start",
     "start:docker:local": "docker run -p 3000:3000 --env-file .env.local blockscout-frontend",
-    "start:docker:poa_core": "docker run -p 3000:3000 --env-file ./configs/envs/.env.poa_core --env-file ./configs/envs/.env.secrets blockscout-frontend",
-    "lint:eslint": "./node_modules/.bin/eslint . --ext .js,.jsx,.ts,.tsx",
-    "lint:eslint:fix": "./node_modules/.bin/eslint . --ext .js,.jsx,.ts,.tsx --fix",
-    "lint:tsc": "./node_modules/.bin/tsc -p ./tsconfig.json",
+    "start:docker:preset": "./tools/scripts/docker.preset.sh",
+    "lint:eslint": "eslint . --ext .js,.jsx,.ts,.tsx",
+    "lint:eslint:fix": "eslint . --ext .js,.jsx,.ts,.tsx --fix",
+    "lint:tsc": "tsc -p ./tsconfig.json",
     "prepare": "husky install",
-    "format-svg": "./node_modules/.bin/svgo -r ./icons",
+    "format-svg": "svgo -r ./icons",
     "test:pw": "./playwright/make-envs-script.sh && NODE_OPTIONS=\"--max-old-space-size=4096\" ./node_modules/.bin/dotenv -e ./configs/envs/.env.pw -- playwright test -c playwright-ct.config.ts",
     "test:pw:local": "export NODE_PATH=$(pwd)/node_modules && rm -rf ./playwright/.cache && yarn test:pw",
     "test:pw:docker": "docker run --rm --network host -v $(pwd):/work/ -w /work/ -it mcr.microsoft.com/playwright:v1.35.1-focal ./playwright/run-tests.sh",

tools/scripts/dev.preset.sh

+#!/bin/bash
+
+if [ "$#" -ne 1 ]; then
+  echo "Usage: yarn dev:preset <preset_name>"
+  exit 1
+fi
+
+preset_name="$1"
+config_file="./configs/envs/.env.${preset_name}"
+secrets_file="./configs/envs/.env.secrets"
+
+if [ ! -f "$config_file" ]; then
+    echo "Error: File '$config_file' not found."
+    exit 1
+fi
+
+if [ ! -f "$secrets_file" ]; then
+    echo "Error: File '$secrets_file' not found."
+    exit 1
+fi
+
+dotenv \
+  -v NEXT_PUBLIC_GIT_COMMIT_SHA=$(git rev-parse --short HEAD) \
+  -v NEXT_PUBLIC_GIT_TAG=$(git describe --tags --abbrev=0) \
+  -e $config_file \
+  -e $secrets_file \
+  -- bash -c 'next dev -- -p $NEXT_PUBLIC_APP_PORT' |
+pino-pretty
\ No newline at end of file

tools/scripts/docker.preset.sh

+#!/bin/bash
+
+if [ "$#" -ne 1 ]; then
+  echo "Usage: yarn start:docker:preset <preset_name>"
+  exit 1
+fi
+
+preset_name="$1"
+config_file="./configs/envs/.env.${preset_name}"
+secrets_file="./configs/envs/.env.secrets"
+
+if [ ! -f "$config_file" ]; then
+    echo "Error: File '$config_file' not found."
+    exit 1
+fi
+
+if [ ! -f "$secrets_file" ]; then
+    echo "Error: File '$secrets_file' not found."
+    exit 1
+fi
+
+docker run -p 3000:3000 --env-file $config_file --env-file $secrets_file blockscout-frontend | pino-pretty
\ No newline at end of file