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63 lines
1.8 KiB
Text
63 lines
1.8 KiB
Text
--> A utility script that prints out a CSV
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--> file in a prettified format to stdout
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local LINE_SEPARATOR = "\n"
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local COMMA_SEPARATOR = ","
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local fs = require("@lune/fs")
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local process = require("@lune/process")
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local path = process.args[1] or ".lune/data/test.csv"
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assert(path ~= nil and #path > 0, "No input file path was given")
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assert(not fs.isDir(path), "Input file path was a dir, not a file")
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assert(fs.isFile(path), "Input file path does not exist")
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-- Read all the lines of the wanted file, and then split
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-- out the raw lines containing comma-separated values
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local csvTable = {}
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for index, rawLine in string.split(fs.readFile(path), LINE_SEPARATOR) do
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if #rawLine > 0 then
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csvTable[index] = string.split(rawLine, COMMA_SEPARATOR)
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end
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end
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-- Gather the maximum widths of strings
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-- for alignment & spacing in advance
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local maxWidths = {}
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for _, row in csvTable do
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for index, value in row do
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maxWidths[index] = math.max(maxWidths[index] or 0, #value)
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end
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end
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local totalWidth = 0
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local totalColumns = 0
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for _, width in maxWidths do
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totalWidth += width
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totalColumns += 1
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end
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-- We have everything we need, print it out with
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-- the help of some unicode box drawing characters
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local thiccLine = string.rep("━", totalWidth + totalColumns * 3 - 1)
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print(string.format("┏%s┓", thiccLine))
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for rowIndex, row in csvTable do
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local paddedValues = {}
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for valueIndex, value in row do
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local spacing = string.rep(" ", maxWidths[valueIndex] - #value)
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table.insert(paddedValues, value .. spacing)
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end
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print(string.format("┃ %s ┃", table.concat(paddedValues, " ┃ ")))
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-- The first line is the header, we should
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-- print out an extra separator below it
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if rowIndex == 1 then
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print(string.format("┣%s┫", thiccLine))
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end
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end
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print(string.format("┗%s┛", thiccLine))
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