.gitignore

@@ -1,5 +1,4 @@
 /bin
 # /.vscode
 *.csv
-*.md
 !example.csv

.vscode/launch.json

@@ -2,17 +2,19 @@
     // Use IntelliSense to learn about possible attributes.
     // Hover to view descriptions of existing attributes.
     // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
-    "version": "0.2.0",
-    "configurations": [
-        {
-            "name": "Debug csv2md",
-            "type": "go",
-            "request": "launch",
-            "mode": "auto",
-            "program": "main.go"
-            // "args": [
-            //     "example.csv",
-            // ]
-        }
-    ]
+    {
+        "version": "0.2.0",
+        "configurations": [
+            {
+                "name": "Launch Package",
+                "type": "go",
+                "request": "launch",
+                "mode": "auto",
+                "program": "${fileBasename}",
+                "args": [
+                    "example.csv",
+                ]
+            }
+        ]
+    }
 }

README.md

@@ -4,35 +4,20 @@ Stupidly simple tool to convert csv-file to [markdown](https://spec-md.com/) tab
 
 Outputs result in stdout.
 
-## Usage
+Building:
 
 ```shell
-csv2md (-h|-help|--help|help)    # to get this help
-csv2md example.csv               # convert data from file and write result in stdout
-csv2md < example.csv             # convert data from stdin and write result in stdout
-cat example.csv | csv2md         # convert data from stdin and write result in stdout
-csv2md example.csv > example.md  # convert data from file and write result in new file
-csv2md example.csv | less        # convert data from file and write result in stdout using pager
-csv2md                           # paste or type data to stdin by hands
-                                 # press Ctrl+D to view result in stdout
-csv2md > example.md              # paste or type data to stdin by hands
-                                 # press Ctrl+D to write result in new file
+make help
+```
 
+Usage:
+
+```shell
+csv2md example.csv > example.md # makes new file
+csv2md example.csv | less       # view result using *pager*
 ...anything is possible with redirection and piping
 ```
 
-> **IMPORTANT:**
-> * input must be valid csv
-> * whitespaces allowed only between double-quotes
+> **IMPORTANT:** input must be valid csv and whitespaces are allowed only between double-quotes.
 
 Examples can be found here: https://people.sc.fsu.edu/~jburkardt/data/csv/csv.html
-
-## Compilation
-
-1) [Install go](https://go.dev/learn/).
-2) Download this repo via zip or `git clone`.
-3) Run `make help` to get help or `go run . <csv_path>` to build and run temporary binary.
-
-## License
-
-[MIT](LICENSE)

example.csv

@@ -1,50 +1,14 @@
-"Name","Team","Position","Height(inches)","Weight(lbs)","Age"
-"Adam Donachie","BAL","Catcher",74,180,22.99
-"Paul Bako","BAL","Catcher",74,215,34.69
-"Ramon Hernandez","BAL","Catcher",72,210,30.78
-"Kevin Millar","BAL","First Baseman",72,210,35.43
-"Chris Gomez","BAL","First Baseman",73,188,35.71
-"Brian Roberts","BAL","Second Baseman",69,176,29.39
-"Miguel Tejada","BAL","Shortstop",69,209,30.77
-"Melvin Mora","BAL","Third Baseman",71,200,35.07
-"Aubrey Huff","BAL","Third Baseman",76,231,30.19
-"Adam Stern","BAL","Outfielder",71,180,27.05
-"Jeff Fiorentino","BAL","Outfielder",73,188,23.88
-"Freddie Bynum","BAL","Outfielder",73,180,26.96
-"Nick Markakis","BAL","Outfielder",74,185,23.29
-"Brandon Fahey","BAL","Outfielder",74,160,26.11
-"Corey Patterson","BAL","Outfielder",69,180,27.55
-"Jay Payton","BAL","Outfielder",70,185,34.27
-"Jay Gibbons","BAL","Designated Hitter",72,197,30
-"Erik Bedard","BAL","Starting Pitcher",73,189,27.99
-"Hayden Penn","BAL","Starting Pitcher",75,185,22.38
-"Adam Loewen","BAL","Starting Pitcher",78,219,22.89
-"Daniel Cabrera","BAL","Starting Pitcher",79,230,25.76
-"Steve Trachsel","BAL","Starting Pitcher",76,205,36.33
-"Jaret Wright","BAL","Starting Pitcher",74,230,31.17
-"Kris Benson","BAL","Starting Pitcher",76,195,32.31
-"Scott Williamson","BAL","Relief Pitcher",72,180,31.03
-"John Parrish","BAL","Relief Pitcher",71,192,29.26
-"Danys Baez","BAL","Relief Pitcher",75,225,29.47
-"Chad Bradford","BAL","Relief Pitcher",77,203,32.46
-"Jamie Walker","BAL","Relief Pitcher",74,195,35.67
-"Brian Burres","BAL","Relief Pitcher",73,182,25.89
-"Kurt Birkins","BAL","Relief Pitcher",74,188,26.55
-"James Hoey","BAL","Relief Pitcher",78,200,24.17
-"Sendy Rleal","BAL","Relief Pitcher",73,180,26.69
-"Chris Ray","BAL","Relief Pitcher",75,200,25.13
-"Jeremy Guthrie","BAL","Relief Pitcher",73,200,27.9
-"A.J. Pierzynski","CWS","Catcher",75,245,30.17
-"Toby Hall","CWS","Catcher",75,240,31.36
-"Paul Konerko","CWS","First Baseman",74,215,30.99
-"Tadahito Iguchi","CWS","Second Baseman",69,185,32.24
-"Juan Uribe","CWS","Shortstop",71,175,27.61
-"Alex Cintron","CWS","Shortstop",74,199,28.2
-"Joe Crede","CWS","Third Baseman",73,200,28.85
-"Josh Fields","CWS","Third Baseman",73,215,24.21
-"Ryan Sweeney","CWS","Outfielder",76,200,22.02
-"Brian N. Anderson","CWS","Outfielder",74,205,24.97
-"Luis Terrero","CWS","Outfielder",74,206,26.78
-"Pablo Ozuna","CWS","Outfielder",70,186,32.51
-"Scott Podsednik","CWS","Outfielder",72,188,30.95
-"Jermaine Dye","CWS","Outfielder",77,220,33.09
+"Month","1958","1959","1960"
+"JAN",340,360,417
+"FEB",318,342,391
+"MAR",362,406,419
+"APR",348,396,461
+"MAY",363,420,472
+"JUN",435,472,535
+"JUL",491,548,622
+"AUG",505,559,606
+"SEP",404,463,508
+"OCT",359,407,461
+"NOV",310,362,390
+"DEC",337,405,432
+

main.go

@@ -2,8 +2,6 @@ package main
 
 import (
 	"encoding/csv"
-	"errors"
-	"flag"
 	"fmt"
 	"log"
 	"os"
@@ -11,62 +9,33 @@ import (
 	"strings"
 )
 
-const VERSION = "1.1.0"
+const VERSION = "1.0.0"
 
 func main() {
-	log.SetFlags(0)
-	switch len(os.Args) {
-		case 1: // first we read data from stdin and then convert it
-			data, err := readRawCsv()
-			if err != nil {
-				log.Fatal(err)
-			}
-			print(data)
-
-		case 2: // but if 2nd arg is present
-			// probably user wants to get help
-			help1 := flag.Bool("h", false, "Get help")
-			help2 := flag.Bool("help", false, "Get help")
-			flag.Parse()
-			if os.Args[1] == "help" || *help1 || *help2 {
-				usage(os.Stdout)
-				os.Exit(0)
-			}
-
-			// ...or to convert data from file
-			src, err := ExpandPath(os.Args[1])
-			if err != nil {
-				log.Fatal(err)
-			}
-			if _, err := os.Stat(src); err != nil {
-				log.Fatal(err)
-			}
-
-			data, err := readCsvFile(src)
-			if err != nil {
-				log.Fatal(err)
-			}
-			print(data)
-
-		// otherwise let's show usage help and exit (probably inaccessible code, but anyway)
-		default:
-			usage(os.Stdout)
-			os.Exit(0)
+	if len(os.Args) < 2 {
+		usage()
+		os.Exit(1)
 	}
-}
 
-// print write converted data to stdout
-func print(data [][]string) {
-	if len(data) == 0 {
-		usage(os.Stderr)
+	src, err := ExpandPath(os.Args[1])
+	if err != nil {
+		panic(err)
 	}
-	result := convert(data)
+	if _, err := os.Stat(src); err != nil {
+		panic(err)
+	}
+
+	result := convert(readCsv(src))
 	for _, row := range result {
 		fmt.Println(row)
 	}
 }
 
-// ExpandPath return absolute path to file replacing ~ to user's home folder
+func usage() {
+	fmt.Fprintln(os.Stderr, "csv2md v" + VERSION)
+	fmt.Fprintln(os.Stderr, "Usage: csv2md data.csv > data.md")
+}
+
 func ExpandPath(path string) (string, error) {
 	homepath, err := os.UserHomeDir()
 	if err != nil {
@@ -76,34 +45,22 @@ func ExpandPath(path string) (string, error) {
 	return newpath, err
 }
 
-// readRawCsv read data from file
-func readCsvFile(filePath string) ([][]string, error) {
+func readCsv(filePath string) [][]string {
     f, err := os.Open(filePath)
     if err != nil {
-    	return nil, errors.New("Failed to open file '" + filePath + "': " + err.Error())
+        log.Fatal("Unable to read input file " + filePath, err)
     }
     defer f.Close()
 
     csvReader := csv.NewReader(f)
     records, err := csvReader.ReadAll()
     if err != nil {
-    	return nil, errors.New("Failed to parse CSV from file '" + filePath + "': " + err.Error())
+        log.Fatal("Unable to parse file as CSV for " + filePath, err)
     }
 
-    return records, nil
+    return records
 }
 
-// readRawCsv read data from stdin
-func readRawCsv() ([][]string, error) {
-    csvReader := csv.NewReader(os.Stdin)
-    records, err := csvReader.ReadAll()
-    if err != nil {
-    	return nil, errors.New("Failed to parse CSV from stdin: " + err.Error())
-    }
-    return records, nil
-}
-
-// convert format data from file or stdin as markdown
 func convert(records [][]string) []string {
 	var result []string
 	for idx, row := range records {
@@ -122,27 +79,3 @@ func convert(records [][]string) []string {
 	}
 	return result
 }
-
-// usage print help into writer
-func usage(writer *os.File) {
-	usage := []string{
-		"csv2md v" + VERSION,
-		"Anthony Axenov (c) 2022, MIT license",
-		"https://github.com/anthonyaxenov/csv2md",
-		"",
-		"Usage:",
-		"\tcsv2md (-h|-help|--help|help)    # to get this help",
-		"\tcsv2md example.csv               # convert data from file and write result in stdout",
-		"\tcsv2md < example.csv             # convert data from stdin and write result in stdout",
-		"\tcat example.csv | csv2md         # convert data from stdin and write result in stdout",
-		"\tcsv2md example.csv > example.md  # convert data from file and write result in new file",
-		"\tcsv2md example.csv | less        # convert data from file and write result in stdout using pager",
-		"\tcsv2md                           # paste or type data to stdin by hands",
-		"\t                                 # press Ctrl+D to view result in stdout",
-		"\tcsv2md > example.md              # paste or type data to stdin by hands",
-		"\t                                 # press Ctrl+D to write result in new file",
-	}
-	for _, str := range usage {
-		fmt.Fprintln(writer, str)
-	}
-}