added reference to qr code

documentation.md

@@ -282,7 +282,7 @@ Defaults to `table`. `csv` and `markdown` can be printed to stdout, `pdf` and `x
 There are additional options for the invoice output as given in the following example:
 
 ```shell
-gtt report --output=invoice --file=invoice.md --from 2021-02-01 --to 2021-02-28 --closed  --invoiceCurrencyMaxUnit 1 --invoiceTitle "Rechnung" --invoiceAddress "Firma" "Mr. X" "Strasse" "10000 Ort" "Land" --invoiceCurrency "EUR" --invoiceCurrencyPerHour "50" --invoiceVAT "0.15" --invoiceDate "1.03.2021" --invoicePositionText "Position Text"
+gtt report --output=invoice --file=invoice.md --from 2021-02-01 --to 2021-02-28 --closed  --invoiceCurrencyMaxUnit 1 --invoiceTitle "Rechnung" --invoiceReference "Reference" --invoiceAddress "Firma" "Mr. X" "Strasse" "10000 Ort" "Land" --invoiceCurrency "EUR" --invoiceCurrencyPerHour "50" --invoiceVAT "0.15" --invoiceDate "1.03.2021" --invoicePositionText "Position Text"
 ```
 
 For paper invoice, further process the output with a css, see the folder preview (styles.css, invoice.pdf)

src/gtt-report.js

@@ -66,6 +66,7 @@ program
     .option('--show_without_times', 'show issues/merge requests without time records')
     .option('--from_dump <file>', 'instead of querying gitlab, use data from the given dump file')
     .option('--invoiceTitle <title>', 'title on invoice')
+    .option('--invoiceReference <reference>', 'payment reference on invoice')
     .option('--invoiceAddress [address...]', 'address')
     .option('--invoiceCurrency <currency>', 'currecnty on invoice')
     .option('--invoiceCurrencyPerHour <number>', 'hourly wage rate on invoice')
@@ -133,6 +134,7 @@ config
     .set('subgroups', program.opts().subgroups)
     .set('_verbose', program.opts().verbose)
     .set('invoiceTitle', program.opts().invoiceTitle)
+    .set('invoiceReference', program.opts().invoiceReference)
     .set('invoiceAddress', program.opts().invoiceAddress)
     .set('invoiceCurrency', program.opts().invoiceCurrency)
     .set('invoiceCurrencyPerHour', program.opts().invoiceCurrencyPerHour)

src/output/invoice.js

@@ -71,7 +71,7 @@ class invoice extends Base {
         const data = {
             currency: "CHF",
             amount: this.totalForInvoice,
-            reference: this.config.get('invoiceTitle'),
+            reference: this.config.get('invoiceReference'),
             creditor: {
             name: this.config.get('invoiceSettings').from [0],
             address: this.config.get('invoiceSettings').from [2],