Add --split option to split over several lines.

data_uri.nimble

@@ -1,6 +1,6 @@
 # Package
 
-version       = "1.0.0"
+version       = "1.0.1"
 author        = "Jonathan Bernard"
 description   = "Utility for managing data-uris: transforming data to and from, etc."
 license       = "GPL-3.0-only"
@@ -15,9 +15,10 @@ requires @[
   "nim >= 1.4.4",
   "docopt 0.6.8",
   "filetype",
+  "zero_functional",
 
   "https://git.jdb-software.com/jdb/update-nim-package-version"
 ]
 
 task updateVersion, "Update the version of this package.":
-  exec "update_nim_package_version data_uri 'src/data_uripkg/version.nim'"
+  exec "update_nim_package_version data_uri 'src/data_uripkg/version.nim'"

src/data_uri.nim

@@ -1,13 +1,13 @@
 ## Data URI Utilities
 
-import base64, docopt, filetype, logging, nre, os
-from strutils import isEmptyOrWhitespace
+import std/[base64, logging, os, sequtils, strutils, wordwrap]
+import std/nre except toSeq
+import docopt, filetype, zero_functional
 
-include "data_uripkg/version.nim"
+import data_uripkg/version
 
 let dataUriPattern = re"^data:([^;,]+)?(;base64)?,(.+)$"
 
-
 proc encodeAsDataUri*(value: string, mimeType: string = ""): string =
   let actualMimeType =
     if mimeType.isEmptyOrWhitespace: filetype.match(cast[seq[byte]](value)).mime.value
@@ -48,6 +48,10 @@ Options:
   -t, --type <mimeType>   Manually set the MIME type rather than trying to
                           infer it from the file extension. This only applies
                           when encoding files to data-uris.
+
+  -s, --split <length>    Split the output across multiple lines with a maximum
+                          of <length> characters on each line. By default the
+                          output is contiguous, all on one line.
 """
 
     logging.addHandler(newConsoleLogger())
@@ -73,12 +77,20 @@ Options:
     try:
       if args["encode"]:
         let binaryData = readAll(fileIn)
-        write(fileOut, encodeAsDataUri(binaryData))
+        let encodedData = encodeAsDataUri(binaryData)
+        if args["--split"]:
+          write(fileOut, encodedData.wrapWords(parseInt($args["--split"])))
+        else: write(fileOut, encodedData)
 
       if args["decode"]:
         let dataUri = readAll(fileIn)
-        write(fileOut, decodeDataUri(dataUri))
+        let dataToDecode = (dataUri.splitLines.toSeq -->
+          map(it.replace(re"\s+", ""))).
+          join("")
+        let decodedData = decodeDataUri(dataToDecode)
+        write(fileOut, decodedData)
 
+    except: raise getCurrentException()
     finally:
       close(fileIn)
       close(fileOut)

src/data_uripkg/version.nim

@@ -1 +1 @@
-const DATA_URI_VERSION* = "1.0.0"
+const DATA_URI_VERSION* = "1.0.1"