34 lines
1.1 KiB
Bash
Executable file
34 lines
1.1 KiB
Bash
Executable file
#!/bin/sh
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# Run by the nginx image's entrypoint before nginx starts. Writes the runtime
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# config the SPA reads as window.__APP_CONFIG__, so one image serves every
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# environment. To expose a new env var to the browser, add its name to VARS.
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# Never put secrets here: everything in config.js is public.
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set -eu
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VARS="API_BASE_URL APP_NAME UNLEASH_URL UNLEASH_FRONTEND_TOKEN"
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OUT=/usr/share/nginx/html/config.js
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: "${API_BASE_URL:=/api}"
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: "${APP_NAME:=app}"
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json_escape() {
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printf '%s' "$1" | sed -e 's/\\/\\\\/g' -e 's/"/\\"/g'
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}
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body=""
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for name in $VARS; do
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eval "value=\${$name:-}"
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[ -n "$body" ] && body="$body,"
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body="$body\"$name\":\"$(json_escape "$value")\""
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done
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printf 'window.__APP_CONFIG__ = {%s};\n' "$body" > "$OUT"
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# nginx variables for the JSON access log (nginx/default.conf). Restricted
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# charset: these land inside nginx string literals.
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safe() { printf '%s' "$1" | tr -cd 'A-Za-z0-9._-'; }
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cat > /etc/nginx/conf.d/service-vars.conf <<NGINX
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map \$host \$app_name { default "$(safe "$APP_NAME")"; }
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map \$host \$git_sha { default "$(safe "${GIT_SHA:-dev}")"; }
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NGINX
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echo "10-config.sh: wrote $OUT and service-vars.conf"
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