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authorGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
committerGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
commite06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch)
tree55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/loose-envify/replace.js
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Diffstat (limited to 'node_modules/loose-envify/replace.js')
-rw-r--r--node_modules/loose-envify/replace.js65
1 files changed, 65 insertions, 0 deletions
diff --git a/node_modules/loose-envify/replace.js b/node_modules/loose-envify/replace.js
new file mode 100644
index 0000000..ec15e81
--- /dev/null
+++ b/node_modules/loose-envify/replace.js
@@ -0,0 +1,65 @@
+'use strict';
+
+var jsTokens = require('js-tokens').default;
+
+var processEnvRe = /\bprocess\.env\.[_$a-zA-Z][$\w]+\b/;
+var spaceOrCommentRe = /^(?:\s|\/[/*])/;
+
+function replace(src, envs) {
+ if (!processEnvRe.test(src)) {
+ return src;
+ }
+
+ var out = [];
+ var purge = envs.some(function(env) {
+ return env._ && env._.indexOf('purge') !== -1;
+ });
+
+ jsTokens.lastIndex = 0
+ var parts = src.match(jsTokens);
+
+ for (var i = 0; i < parts.length; i++) {
+ if (parts[i ] === 'process' &&
+ parts[i + 1] === '.' &&
+ parts[i + 2] === 'env' &&
+ parts[i + 3] === '.') {
+ var prevCodeToken = getAdjacentCodeToken(-1, parts, i);
+ var nextCodeToken = getAdjacentCodeToken(1, parts, i + 4);
+ var replacement = getReplacementString(envs, parts[i + 4], purge);
+ if (prevCodeToken !== '.' &&
+ nextCodeToken !== '.' &&
+ nextCodeToken !== '=' &&
+ typeof replacement === 'string') {
+ out.push(replacement);
+ i += 4;
+ continue;
+ }
+ }
+ out.push(parts[i]);
+ }
+
+ return out.join('');
+}
+
+function getAdjacentCodeToken(dir, parts, i) {
+ while (true) {
+ var part = parts[i += dir];
+ if (!spaceOrCommentRe.test(part)) {
+ return part;
+ }
+ }
+}
+
+function getReplacementString(envs, name, purge) {
+ for (var j = 0; j < envs.length; j++) {
+ var env = envs[j];
+ if (typeof env[name] !== 'undefined') {
+ return JSON.stringify(env[name]);
+ }
+ }
+ if (purge) {
+ return 'undefined';
+ }
+}
+
+module.exports = replace;