UPC and EAN generation with Zint

# Install
brew install zint

# EAN
zint --directeps --height="30"  --barcode="13" --data="123456789104" > 1234-ean.eps

# UPC
zint --directeps --height="30"  --barcode="34" --data="12345678910" > 1234-upc.eps

# Help
  -h, --help            Display this message.
  -t, --types           Display table of barcode types
  -i, --input=FILE      Read data from FILE.
  -o, --output=FILE     Write image to FILE. (default is out.png)
  -d, --data=DATA       Barcode content.
  -b, --barcode=NUMBER  Number of barcode type (default is 20 (=Code128)).
  --height=NUMBER       Height of symbol in multiples of x-dimension.
  -w, --whitesp=NUMBER  Width of whitespace in multiples of x-dimension.
  --border=NUMBER       Width of border in multiples of x-dimension.
  --box                 Add a box.
  --bind                Add boundary bars.
  -r, --reverse         Reverse colours (white on black).
  --fg=COLOUR           Specify a foreground colour.
  --bg=COLOUR           Specify a background colour.
  --scale=NUMBER        Adjust size of output image.
  --directpng           Send PNG output to stdout
  --directeps           Send EPS output to stdout
  --directsvg           Send SVG output to stdout
  --dump                Dump binary data to stdout
  --rotate=NUMBER       Rotate symbol (PNG output only).
  --cols=NUMBER         (PDF417) Number of columns.
  --vers=NUMBER         (QR Code) Version
  --secure=NUMBER       (PDF417 and QR Code) Error correction level.
  --primary=STRING      (Maxicode and Composite) Structured primary message.
  --mode=NUMBER         (Maxicode and Composite) Set encoding mode.
  --gs1                 Treat input as GS1 data
  --binary              Treat input as Binary data
  --notext              Remove human readable text
  --square              Force Data Matrix symbols to be square
  --init                Create reader initialisation symbol (Code 128)
  --smalltext           Use half-size text in PNG images
  --batch               Treat each line of input as a separate data set

# Barcode Types
 1: Code 11           51: Pharma One-Track         90: KIX Code
 2: Standard 2of5     52: PZN                      92: Aztec Code
 3: Interleaved 2of5  53: Pharma Two-Track         93: DAFT Code
 4: IATA 2of5         55: PDF417                   97: Micro QR Code
 6: Data Logic        56: PDF417 Trunc             98: HIBC Code 128
 7: Industrial 2of5   57: Maxicode                 99: HIBC Code 39
 8: Code 39           58: QR Code                 102: HIBC Data Matrix
 9: Extended Code 39  60: Code 128-B              104: HIBC QR Code
13: EAN               63: AP Standard Customer    106: HIBC PDF417
16: GS1-128           66: AP Reply Paid           108: HIBC MicroPDF417
18: Codabar           67: AP Routing              112: HIBC Aztec Code
20: Code 128          68: AP Redirection          128: Aztec Runes
21: Leitcode          69: ISBN                    129: Code 23
22: Identcode         70: RM4SCC                  130: Comp EAN
23: Code 16k          71: Data Matrix             131: Comp GS1-128
24: Code 49           72: EAN-14                  132: Comp Databar-14
25: Code 93           75: NVE-18                  133: Comp Databar Ltd
28: Flattermarken     76: Japanese Post           134: Comp Databar Ext
29: Databar-14        77: Korea Post              135: Comp UPC-A
30: Databar Limited   79: Databar-14 Stack        136: Comp UPC-E
31: Databar Extended  80: Databar-14 Stack Omni   137: Comp Databar-14 Stack
32: Telepen Alpha     81: Databar Extended Stack  138: Comp Databar Stack Omni
34: UPC-A             82: Planet                  139: Comp Databar Ext Stack
37: UPC-E             84: MicroPDF                140: Channel Code
40: Postnet           85: USPS OneCode            141: Code One
47: MSI Plessey       86: UK Plessey              142: Grid Matrix
49: FIM               87: Telepen Numeric
50: Logmars           89: ITF-14