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Add support for evalulating {{env.<var>}} within a template node

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This commit is contained in:
cow0w 2022-06-17 22:18:14 +03:00
parent 1af56a7f00
commit 01d9affe61
2 changed files with 46 additions and 0 deletions
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24
packages/node_modules/@node-red/nodes/core/function/80-template.js vendored
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@ -44,6 +44,14 @@ module.exports = function(RED) {
return undefined; return undefined;
} }
function parseEnv(key) {
var match = /^env\.(.+)/.exec(key);
if (match) {
return match[1];
}
return undefined;
}
/** /**
* Custom Mustache Context capable to collect message property and node * Custom Mustache Context capable to collect message property and node
* flow and global context * flow and global context
@ -74,6 +82,11 @@ module.exports = function(RED) {
return value; return value;
} }
// try env
if (parseEnv(name)) {
return this.cachedContextTokens[name];
}
// try flow/global context: // try flow/global context:
var context = parseContext(name); var context = parseContext(name);
if (context) { if (context) {
@ -156,6 +169,17 @@ module.exports = function(RED) {
var tokens = extractTokens(mustache.parse(template)); var tokens = extractTokens(mustache.parse(template));
var resolvedTokens = {}; var resolvedTokens = {};
tokens.forEach(function(name) { tokens.forEach(function(name) {
var env_name = parseEnv(name);
if (env_name) {
var promise = new Promise((resolve, reject) => {
var val = RED.util.evaluateNodeProperty(env_name, 'env', node)
resolvedTokens[name] = val;
resolve();
});
promises.push(promise);
return;
}
var context = parseContext(name); var context = parseContext(name);
if (context) { if (context) {
var type = context.type; var type = context.type;

22
test/nodes/core/function/80-template_spec.js
View File

@ -144,6 +144,28 @@ describe('template node', function() {
}); });
}); });
describe('env var', function() {
before(function() {
process.env.TEST = 'xyzzy';
})
after(function() {
delete process.env.TEST;
})
it('should modify payload from env variable', function(done) {
var flow = [{id:"n1",z:"t1", type:"template", field:"payload", template:"payload={{env.TEST}}",wires:[["n2"]]},{id:"n2",z:"t1",type:"helper"}];
helper.load(templateNode, flow, function() {
var n1 = helper.getNode("n1");
var n2 = helper.getNode("n2");
n2.on("input", function(msg) {
msg.should.have.property('payload', 'payload=xyzzy');
done();
});
n1.receive({payload:"foo",topic: "bar"});
});
});
});
it('should modify payload from flow context', function(done) { it('should modify payload from flow context', function(done) {
var flow = [{id:"n1",z:"t1", type:"template", field:"payload", template:"payload={{flow.value}}",wires:[["n2"]]},{id:"n2",z:"t1",type:"helper"}]; var flow = [{id:"n1",z:"t1", type:"template", field:"payload", template:"payload={{flow.value}}",wires:[["n2"]]},{id:"n2",z:"t1",type:"helper"}];
helper.load(templateNode, flow, function() { helper.load(templateNode, flow, function() {