Fixed makefile

Small fixes

.gitignore

@@ -1,5 +1,6 @@
 /bin
 # /.vscode
 *.csv
+*.tsv
 *.md
 !example.csv

.vscode/launch.json

@@ -5,14 +5,71 @@
     "version": "0.2.0",
     "configurations": [
         {
-            "name": "Debug csv2md",
+            "name": "csv",
             "type": "go",
             "request": "launch",
             "mode": "auto",
-            "program": "main.go"
-            // "args": [
-            //     "example.csv",
-            // ]
-        }
+            "program": "main.go",
+            "args": [
+                "-f=example.csv",
+            ]
+        },
+        {
+            "name": "csv aligned",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "main.go",
+            "args": [
+                "-f=example.csv",
+                "-a"
+            ]
+        },
+        {
+            "name": "csv header",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "main.go",
+            "args": [
+                "-f=example.csv",
+                "-h=\"My Header\"",
+            ]
+        },
+        {
+            "name": "tsv",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "main.go",
+            "args": [
+                "-f=example.tsv",
+                "-t"
+            ]
+        },
+        {
+            "name": "tsv aligned",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "main.go",
+            "args": [
+                "-f=example.tsv",
+                "-t",
+                "-a"
+            ]
+        },
+        {
+            "name": "tsv header",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "main.go",
+            "args": [
+                "-f=example.tsv",
+                "-h=\"My Header\"",
+                "-t"
+            ]
+        },
     ]
-}
+}

Makefile

@@ -1,6 +1,3 @@
-# https://habr.com/ru/post/461467/
-# https://tutorialedge.net/golang/makefiles-for-go-developers/
-# https://earthly.dev/blog/golang-makefile/
 BINARY_NAME=csv2md
 ARCH=amd64
 
@@ -12,30 +9,36 @@ LINUX_FILE="${LINUX_PATH}/${BINARY_NAME}"
 WINDOWS_FILE="${WINDOWS_PATH}/${BINARY_NAME}.exe"
 DARWIN_FILE="${DARWIN_PATH}/${BINARY_NAME}"
 
-## clean: Removes all compiled binaries
+## clean: Remove all compiled binaries
 clean:
 	@go clean
 	@rm -rf bin/
 
-## linux: Builds new binaries for linux (x64)
+## linux: Build new binaries for linux (x64)
 linux:
 	@rm -rf ${LINUX_PATH}
 	@GOARCH=${ARCH} GOOS=linux go build -o ${LINUX_FILE} . && echo "Compiled: ${LINUX_FILE}"
 
-## win: Builds new binaries for windows (x64)
+## win: Build new binaries for windows (x64)
 win:
 	@rm -rf ${WINDOWS_PATH}
 	@GOARCH=${ARCH} GOOS=windows go build -o ${WINDOWS_FILE} . && echo "Compiled: ${WINDOWS_FILE}"
 
-## darwin: Builds new binaries for darwin (x64)
+## darwin: Build new binaries for darwin (x64)
 darwin:
 	@rm -rf ${DARWIN_PATH}
 	@GOARCH=${ARCH} GOOS=darwin go build -o ${DARWIN_FILE} . && echo "Compiled: ${DARWIN_FILE}"
 
-## build: Builds new binaries for linux, windows and darwin (x64)
+## all: Build new binaries for linux, windows and darwin (x64)
 all: clean linux win darwin
 
-## compile: This message
+## release: Build all binaries and zip them
+release: clean darwin linux win
+	@zip -j ${LINUX_PATH}.zip ${LINUX_FILE}
+	@zip -j ${DARWIN_PATH}.zip ${DARWIN_FILE}
+	@zip -j ${WINDOWS_PATH}.zip ${WINDOWS_FILE}
+
+## help: This message
 help: Makefile
 	@echo "Choose a command run:"
 	@sed -n 's/^##//p' $< | column -t -s ':' |  sed -e 's/^/ /'

README.md

@@ -1,37 +1,64 @@
 # csv2md
 
-Stupidly simple tool to convert csv-file to [markdown](https://spec-md.com/) table.
+Stupidly simple tool to convert csv/tsv to [markdown](https://spec-md.com/) table.
 
-Outputs result in stdout.
+Prints result in stdout.
 
-## Usage
+```
+Usage:
+    csv2md [-help|--help] [-f=<FILE>] [-h=<HEADER>] [-t] [-a]
 
-```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
+Available arguments:
+    -help|--help   - show this help
+    -f=<FILE>      - convert specified FILE
+    -h=<HEADER>    - add main header (h1) to result
+    -t             - convert input as tsv
+    -a             - align columns width
 
-...anything is possible with redirection and piping
+FILE formats supported:
+    - csv (default)
+    - tsv (with -t flag)
+
+Path to FILE may be presented as:
+    - absolute
+    - relative to current working directory
+    - relative to user home directory (~)
+
+Both HEADER and FILE path with whitespaces must be double-quoted.
+To save result as separate file you should use redirection operators (> or >>).
 ```
 
-> **IMPORTANT:**
-> * input must be valid csv
-> * whitespaces allowed only between double-quotes
+**IMPORTANT:**
+1. Input data must be valid csv/tsv
+2. Whitespaces allowed only between double-quotes
+3. Due to markdown spec first line of result table will always be presented as header.  
+   So if your raw data hasn't one you'll should add it before conversion or edit later in ready md.
 
-Examples can be found here: https://people.sc.fsu.edu/~jburkardt/data/csv/csv.html
+## Examples
+
+```
+csv2md                                - paste or type csv to stdin and then
+                                        press Ctrl+D to view result in stdout
+csv2md -t > example.md                - paste or type tsv to stdin and then
+                                        press Ctrl+D to write result in new file
+csv2md -f example.csv                 - convert csv from file and view result in stdout
+csv2md -t < example.tsv               - convert tsv from stdin and view result in stdout
+csv2md -t < example.tsv > example.md  - convert tsv from stdin and write result in new file
+cat example.csv | csv2md              - convert csv from stdin and view result in stdout
+csv2md -t -f=example.tsv > example.md - convert tsv from file and write result in new file
+csv2md -f example.csv | less          - convert csv from file and view result in stdout using pager
+csv2md -f example.csv | code -n -     - convert csv from file and open result in vscode
+
+...anything is possible with redirection and piping, inc. grep, sed, awk, etc.
+```
+
+You can generate some examples here: [csv](https://onlinerandomtools.com/generate-random-csv), [tsv](https://onlinerandomtools.com/generate-random-tsv)
 
 ## 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.
+3) Run `make help` to get help about compilation or `go run . [ARGS...]` to build and run temporary binary.
 
 ## License
 

example.tsv

@@ -0,0 +1,6 @@
+impossible	political	hand	larger	upward	during
+shade	tip	opinion	star	keep	aside
+wrong	heat	line	pool	song	just
+she	slowly	gain	snow	ourselves	six
+race	thrown	get	yard	nearest	swam
+though	than	teacher	away	dirt	escape

main.go

@@ -11,62 +11,59 @@ import (
 	"strings"
 )
 
-const VERSION = "1.1.0"
+const VERSION = "1.3.0"
 
 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)
+	is_help := flag.Bool("help", false, "Get help")
+	filepath := flag.String("f", "", "File path")
+	header := flag.String("h", "", "Add main header (h1)")
+	as_tsv := flag.Bool("t", false, "Parse input as tsv")
+	aligned := flag.Bool("a", false, "Align columns width")
+	flag.Parse()
 
-		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)
-			}
+	// show help
+	if *is_help {
+		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)
-			}
+	// if filepath is not provided then convert data from stdin
+	if len(*filepath) == 0 {
+		data, err := ReadStdin(*as_tsv)
+		if err != nil {
+			log.Fatal(err)
+		}
+		Print(Convert(*header, data, *aligned))
+	} else { // otherwise convert data from file
+		src, err := ExpandPath(*filepath)
+		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)
+		data, err := ReadFile(src, *as_tsv)
+		if err != nil {
+			log.Fatal(err)
+		}
+		Print(Convert(*header, data, *aligned))
 	}
 }
 
-// print write converted data to stdout
-func print(data [][]string) {
+// Print writes converted data to stdout
+func Print(data []string) {
 	if len(data) == 0 {
 		usage(os.Stderr)
 	}
-	result := convert(data)
-	for _, row := range result {
+
+	for _, row := range data {
 		fmt.Println(row)
 	}
 }
 
-// ExpandPath return absolute path to file replacing ~ to user's home folder
+// ExpandPath returns absolute path to file replacing ~ to user's home folder
 func ExpandPath(path string) (string, error) {
 	homepath, err := os.UserHomeDir()
 	if err != nil {
@@ -76,8 +73,8 @@ func ExpandPath(path string) (string, error) {
 	return newpath, err
 }
 
-// readRawCsv read data from file
-func readCsvFile(filePath string) ([][]string, error) {
+// ReadFile reads data from file
+func ReadFile(filePath string, as_tsv bool) ([][]string, error) {
     f, err := os.Open(filePath)
     if err != nil {
     	return nil, errors.New("Failed to open file '" + filePath + "': " + err.Error())
@@ -85,37 +82,81 @@ func readCsvFile(filePath string) ([][]string, error) {
     defer f.Close()
 
     csvReader := csv.NewReader(f)
+	if as_tsv {
+		csvReader.Comma = '\t'
+	}
+
     records, err := csvReader.ReadAll()
     if err != nil {
-    	return nil, errors.New("Failed to parse CSV from file '" + filePath + "': " + err.Error())
+    	return nil, errors.New("Failed to parse file '" + filePath + "': " + err.Error())
     }
 
     return records, nil
 }
 
-// readRawCsv read data from stdin
-func readRawCsv() ([][]string, error) {
+// ReadStdin reads data from stdin
+func ReadStdin(as_tsv bool) ([][]string, error) {
     csvReader := csv.NewReader(os.Stdin)
+	if as_tsv {
+		csvReader.Comma = '\t'
+	}
+
     records, err := csvReader.ReadAll()
     if err != nil {
-    	return nil, errors.New("Failed to parse CSV from stdin: " + err.Error())
+    	return nil, errors.New("Failed to parse input from stdin: " + err.Error())
     }
+
     return records, nil
 }
 
-// convert format data from file or stdin as markdown
-func convert(records [][]string) []string {
+// Convert formats data from file or stdin as markdown
+func Convert(header string, records [][]string, aligned bool) []string {
 	var result []string
-	for idx, row := range records {
+
+	// add h1 if passed
+	header = strings.Trim(header, "\t\r\n ")
+	if len(header) != 0 {
+		result = append(result, "# " + header)
+		result = append(result, "")
+	}
+
+	// if user wants aligned columns width then we
+	// count max length of every value in every column
+	widths := make(map[int]int)
+	if aligned {
+		for _, row := range records {
+			for col_idx, col := range row {
+				length := len(col)
+				if len(widths) == 0 || widths[col_idx] < length {
+					widths[col_idx] = length
+				}
+			}
+		}
+	}
+
+	// build markdown table
+	for row_idx, row := range records {
+
+		// table content
 		str := "| "
-		for _, col := range row {
-			str += col + " | "
+		for col_idx, col := range row {
+			if aligned {
+				str += fmt.Sprintf("%-*s | ", widths[col_idx], col)
+			} else {
+				str += col + " | "
+			}
 		}
 		result = append(result, str)
-		if idx == 0 {
+
+		// content separator only after first row (header)
+		if row_idx == 0 {
 			str := "| "
-			for range row {
-				str += "--- | "
+			for col_idx := range row {
+				if !aligned || widths[col_idx] < 3 {
+					str += "--- | "
+				} else {
+					str += strings.Repeat("-", widths[col_idx]) + " | "
+				}
 			}
 			result = append(result, str)
 		}
@@ -123,24 +164,34 @@ func convert(records [][]string) []string {
 	return result
 }
 
-// usage print help into writer
+// usage Print help into writer
 func usage(writer *os.File) {
 	usage := []string{
 		"csv2md v" + VERSION,
-		"Anthony Axenov (c) 2022, MIT license",
+		"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",
+		"\tcsv2md [-help|--help] [-f=<FILE>] [-h=<HEADER>] [-t] [-a]",
+		"",
+		"Available arguments:",
+		"\t-help|--help   - show this help",
+		"\t-f=<FILE>      - Convert specified FILE",
+		"\t-h=<HEADER>    - add main header (h1) to result",
+		"\t-t             - Convert input as tsv",
+		"\t-a             - align columns width",
+		"",
+		"FILE formats supported:",
+		"\t- csv (default)",
+		"\t- tsv (with -t flag)",
+		"",
+		"Path to FILE may be presented as:",
+		"\t- absolute",
+		"\t- relative to current working directory",
+		"\t- relative to user home directory (~)",
+		"",
+		"Both HEADER and FILE path with whitespaces must be double-quoted.",
+		"To save result as separate file you should use redirection operators (> or >>).",
 	}
 	for _, str := range usage {
 		fmt.Fprintln(writer, str)