added pretty_json.nim script

pretty_json.nim

@@ -0,0 +1,41 @@
+
+import strutils, json, os
+
+proc cleanupWhitespace(s: string): string =
+ ## Removes trailing whitespace and normalizes line endings to LF.
+ result = newStringOfCap(s.len)
+ var i = 0
+ while i < s.len:
+ if s[i] == ' ':
+ var j = i+1
+ while s[j] == ' ': inc j
+ if s[j] == '\c':
+ inc j
+ if s[j] == '\L': inc j
+ result.add '\L'
+ i = j
+ elif s[j] == '\L':
+ result.add '\L'
+ i = j+1
+ else:
+ result.add ' '
+ inc i
+ elif s[i] == '\c':
+ inc i
+ if s[i] == '\L': inc i
+ result.add '\L'
+ elif s[i] == '\L':
+ result.add '\L'
+ inc i
+ else:
+ result.add s[i]
+ inc i
+ if result[^1] != '\L':
+ result.add '\L'
+
+proc editJson() =
+ var contents = parseFile("packages.json")
+ doAssert contents.kind == JArray
+ writeFile("packages.json", contents.pretty.cleanupWhitespace)
+
+editJson()