From cfbfb43a5e06aac134002900a8630715dec1b9cb Mon Sep 17 00:00:00 2001 From: Jan Tuomi Date: Thu, 19 Dec 2019 13:53:21 +0200 Subject: Initial commit --- .gitignore | 2 + Dockerfile | 18 ++ README.md | 12 ++ nginx-entrypoint.sh | 22 +++ package-lock.json | 477 ++++++++++++++++++++++++++++++++++++++++++++++++++++ package.json | 17 ++ rollup.config.js | 18 ++ src/config.js | 9 + src/index.html | 12 ++ src/index.js | 5 + 10 files changed, 592 insertions(+) create mode 100644 .gitignore create mode 100644 Dockerfile create mode 100644 README.md create mode 100755 nginx-entrypoint.sh create mode 100644 package-lock.json create mode 100644 package.json create mode 100644 rollup.config.js create mode 100644 src/config.js create mode 100644 src/index.html create mode 100644 src/index.js diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..1eae0cf --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +dist/ +node_modules/ diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..fa980b2 --- /dev/null +++ b/Dockerfile @@ -0,0 +1,18 @@ +FROM node:alpine AS builder + +WORKDIR /app +COPY package.json package-lock.json ./ +RUN npm ci + +COPY rollup.config.js ./ +COPY src ./src +RUN npm run build + +FROM nginx:alpine AS server + +WORKDIR /usr/share/nginx/html +RUN apk add --no-cache bash +COPY nginx-entrypoint.sh / +COPY --from=builder /app/dist ./ + +ENTRYPOINT [ "bash", "/nginx-entrypoint.sh" ] diff --git a/README.md b/README.md new file mode 100644 index 0000000..30b4d22 --- /dev/null +++ b/README.md @@ -0,0 +1,12 @@ +# Frontend application with injected environment variables + +## How to use + + docker build -t demo . + docker run -e FRONTEND_EXAMPLE_ENV=foobar -p 8080:80 demo + +Visit http://localhost:8080 to see the result. + +## Author + +Jan Tuomi, . 2019. diff --git a/nginx-entrypoint.sh b/nginx-entrypoint.sh new file mode 100755 index 0000000..e6ed329 --- /dev/null +++ b/nginx-entrypoint.sh @@ -0,0 +1,22 @@ +#!/usr/bin/bash + +WWW_DIR=/usr/share/nginx/html +ENV_PREFIX=FRONTEND_ +INJECT_FILE_PATH="${WWW_DIR}/inject.js" + +cat >> "${INJECT_FILE_PATH}" << EOF +window.injectedEnv = { + NODE_ENV: "production", +EOF + +for envrow in $(printenv); do + IFS='=' read -r key value <<< "${envrow}" + + if [[ $key == "${ENV_PREFIX}"* ]]; then + echo " ${key}: \"${value}\"," >> "${INJECT_FILE_PATH}" + fi +done + +echo "};" >> "${INJECT_FILE_PATH}" + +[ -z "$@" ] && nginx -g 'daemon off;' || "$@" diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 0000000..f69098b --- /dev/null +++ b/package-lock.json @@ -0,0 +1,477 @@ +{ + "name": "medium-frontend-env-demo", + "version": "1.0.0", + "lockfileVersion": 1, + "requires": true, + "dependencies": { + "@nodelib/fs.scandir": { + "version": "2.1.3", + "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.3.tgz", + "integrity": "sha512-eGmwYQn3gxo4r7jdQnkrrN6bY478C3P+a/y72IJukF8LjB6ZHeB3c+Ehacj3sYeSmUXGlnA67/PmbM9CVwL7Dw==", + "dev": 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'rollup-plugin-node-resolve'; +import copy from 'rollup-plugin-copy'; + +export default { + input: 'src/index.js', + output: { + file: 'dist/app.js', + format: 'cjs', + name: 'demo', + }, + plugins: [ + resolve(), + copy({ + targets: [ { src: 'src/index.html', dest: 'dist/' } ], + }), + ], +}; diff --git a/src/config.js b/src/config.js new file mode 100644 index 0000000..ef39548 --- /dev/null +++ b/src/config.js @@ -0,0 +1,9 @@ +const processEnv = typeof process !== 'undefined' ? process.env : {}; +const injectedEnv = window && window.injectedEnv ? window.injectedEnv : {}; + +const env = { + ...processEnv, + ...injectedEnv, +}; + +export { env }; diff --git a/src/index.html b/src/index.html new file mode 100644 index 0000000..e7db26c --- /dev/null +++ b/src/index.html @@ -0,0 +1,12 @@ + + + + Frontend demo with Nginx + environment variables + + + +

Frontend demo with Nginx + environment variables

+
+ + + diff --git a/src/index.js b/src/index.js new file mode 100644 index 0000000..b26e960 --- /dev/null +++ b/src/index.js @@ -0,0 +1,5 @@ +import { env } from './config'; + +Object.keys(env).forEach(key => { + document.getElementById('app').innerHTML += `
${key}: ${env[key]}
`; +}); -- cgit v1.3