chore: close issues bd-3rr and bd-bxt (both implemented)

PowerShell splits `-o=file.xlsx` into `-o=file` + `.xlsx` as separate
args. Fix: auto-append .xlsx if output has no extension, and filter
out .xlsx files from input args with a helpful warning.

.beads/issues.jsonl

@@ -1,2 +1,2 @@
-{"id":"bd-3rr","title":"Fix -o flag: output filename not parsed correctly","description":"## Bug Report\n\nUsing the `-o` flag to specify an output filename causes errors. Instead of using the provided filename, the tool attempts to open/save `.xlsx` (empty basename) and prints memory addresses.\n\n## Reproduction\n\n```\ncsv2excel.exe -enc=windows1252 -o=test.xlsx .\\WDK-SiWo-20260103.csv\n```\n\n## Actual Output\n\n```\n0x3eb5d9d181b0\n0x3eb5d9d181c0\n0x3eb5d9d181d0\nFehler beim Öffnen .xlsx: open .xlsx: The system cannot find the file specified.\n✓ .\\WDK-SiWo-20260103.csv → Reiter \"WDK-SiWo-20260103\" (5324 Zeilen)\nFehler beim Speichern: unsupported workbook file format\n```\n\n## Analysis\n\n- Memory addresses being printed suggest a pointer/value is being passed where a string is expected (e.g. `fmt.Println(&flag)` instead of `fmt.Println(*flag)`)\n- The output path resolves to `.xlsx` instead of `test.xlsx`, meaning the flag value is not read correctly\n- The `unsupported workbook file format` error is a consequence of trying to open a non-existent file as a workbook\n\n## Acceptance Criteria\n- [ ] `csv2excel -o=test.xlsx input.csv` writes output to `test.xlsx`\n- [ ] No memory addresses are printed to stdout/stderr\n- [ ] Error message is shown if the output path is invalid/unwritable\n- [ ] Tests written and passing","status":"closed","priority":1,"issue_type":"bug","created_at":"2026-03-05T09:37:26.921804683Z","created_by":"oli","updated_at":"2026-03-05T09:56:12.843074108Z","closed_at":"2026-03-05T09:56:12.842163406Z","close_reason":"done","source_repo":".","compaction_level":0,"original_size":0}
+{"id":"bd-3rr","title":"Fix -o flag: output filename not parsed correctly","description":"## Bug Report\n\nUsing the `-o` flag to specify an output filename causes errors. Instead of using the provided filename, the tool attempts to open/save `.xlsx` (empty basename) and prints memory addresses.\n\n## Reproduction\n\n```\ncsv2excel.exe -enc=windows1252 -o=test.xlsx .\\WDK-SiWo-20260103.csv\n```\n\n## Actual Output\n\n```\n0x3eb5d9d181b0\n0x3eb5d9d181c0\n0x3eb5d9d181d0\nFehler beim Öffnen .xlsx: open .xlsx: The system cannot find the file specified.\n✓ .\\WDK-SiWo-20260103.csv → Reiter \"WDK-SiWo-20260103\" (5324 Zeilen)\nFehler beim Speichern: unsupported workbook file format\n```\n\n## Analysis\n\n- Memory addresses being printed suggest a pointer/value is being passed where a string is expected (e.g. `fmt.Println(&flag)` instead of `fmt.Println(*flag)`)\n- The output path resolves to `.xlsx` instead of `test.xlsx`, meaning the flag value is not read correctly\n- The `unsupported workbook file format` error is a consequence of trying to open a non-existent file as a workbook\n\n## Acceptance Criteria\n- [ ] `csv2excel -o=test.xlsx input.csv` writes output to `test.xlsx`\n- [ ] No memory addresses are printed to stdout/stderr\n- [ ] Error message is shown if the output path is invalid/unwritable\n- [ ] Tests written and passing","status":"closed","priority":1,"issue_type":"bug","created_at":"2026-03-05T09:37:26.921804683Z","created_by":"oli","updated_at":"2026-03-05T12:10:00.000000000Z","closed_at":"2026-03-05T12:10:00.000000000Z","close_reason":"done","source_repo":".","compaction_level":0,"original_size":0}
-{"id":"bd-bxt","title":"Add --version flag to CLI","description":"## Description\n\nAdd a `--version` flag to the `csv2excel` CLI that outputs version information including the version tag and build timestamp.\n\n## Expected Output\n\n```\ncsv2excel version v0.10.0-1-g3eb502a built 2026-02-19T14:30:13Z\n```\n\nThe version string should be injected at build time using Go linker flags (`-ldflags`), so that `git describe` and a build timestamp are embedded into the binary.\n\n## Implementation Notes\n\n- Define `version` and `buildDate` variables in `main.go` (or a dedicated `version.go`)\n- Inject values via `-ldflags \"-X main.version=... -X main.buildDate=...\"` during `mage Build`\n- Handle the `--version` / `-v` flag and print the version line, then exit 0\n\n## Acceptance Criteria\n- [ ] `csv2excel --version` prints a line matching `csv2excel version <git-describe> built <RFC3339-timestamp>`\n- [ ] Version and build date are injected at build time via ldflags in the Mage build targets\n- [ ] Running `csv2excel --version` exits with code 0\n- [ ] Default (unset) values produce a sensible fallback (e.g. `dev` / `unknown`)\n- [ ] Tests written and passing (if applicable)","status":"open","priority":2,"issue_type":"feature","created_at":"2026-03-05T09:22:40.538253362Z","created_by":"oli","updated_at":"2026-03-05T09:22:40.538253362Z","source_repo":".","compaction_level":0,"original_size":0}
+{"id":"bd-bxt","title":"Add --version flag to CLI","description":"## Description\n\nAdd a `--version` flag to the `csv2excel` CLI that outputs version information including the version tag and build timestamp.\n\n## Expected Output\n\n```\ncsv2excel version v0.10.0-1-g3eb502a built 2026-02-19T14:30:13Z\n```\n\nThe version string should be injected at build time using Go linker flags (`-ldflags`), so that `git describe` and a build timestamp are embedded into the binary.\n\n## Implementation Notes\n\n- Define `version` and `buildDate` variables in `main.go` (or a dedicated `version.go`)\n- Inject values via `-ldflags \"-X main.version=... -X main.buildDate=...\"` during `mage Build`\n- Handle the `--version` / `-v` flag and print the version line, then exit 0\n\n## Acceptance Criteria\n- [ ] `csv2excel --version` prints a line matching `csv2excel version <git-describe> built <RFC3339-timestamp>`\n- [ ] Version and build date are injected at build time via ldflags in the Mage build targets\n- [ ] Running `csv2excel --version` exits with code 0\n- [ ] Default (unset) values produce a sensible fallback (e.g. `dev` / `unknown`)\n- [ ] Tests written and passing (if applicable)","status":"closed","priority":2,"issue_type":"feature","created_at":"2026-03-05T09:22:40.538253362Z","created_by":"oli","updated_at":"2026-03-05T12:10:00.000000000Z","closed_at":"2026-03-05T12:10:00.000000000Z","close_reason":"done","source_repo":".","compaction_level":0,"original_size":0}

CHANGELOG.md

@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [v0.1.1] - 2026-03-05
+
+### Fixed
+
+- `-o` flag value was read as a pointer instead of a string, causing memory addresses to be printed and the output path to resolve to `.xlsx`
+
 ## [v0.1.0] - 2026-03-05
 
 ### Added

magefiles/magefile.go

@@ -7,6 +7,7 @@ import (
 	"os"
 	"path/filepath"
 	"runtime"
+	"time"
 
 	"github.com/magefile/mage/mg"
 	"github.com/magefile/mage/sh"
@@ -23,12 +24,9 @@ func ldflags() (string, error) {
 	if err != nil {
 		commit = "none"
 	}
-	buildDate, err := sh.Output("date", "-u", "+%Y-%m-%dT%H:%M:%SZ")
+	buildDate := time.Now().UTC().Format(time.RFC3339)
-	if err != nil {
-		buildDate = "unknown"
-	}
 	return fmt.Sprintf(
-		`-X csv2excel/internal/version.Version=%s -X csv2excel/internal/version.Commit=%s -X csv2excel/internal/version.BuildDate=%s`,
+		`-X code.beautifulmachines.dev/jakoubek/csv2excel/internal/version.Version=%s -X code.beautifulmachines.dev/jakoubek/csv2excel/internal/version.Commit=%s -X code.beautifulmachines.dev/jakoubek/csv2excel/internal/version.BuildDate=%s`,
 		version, commit, buildDate,
 	), nil
 }
@@ -77,6 +75,7 @@ func BuildWindows() error {
 
 // Install installs the binary to $GOBIN or $GOPATH/bin.
 func Install() error {
+	mg.Deps(Build)
 	fmt.Println("Installing", binaryName, "...")
 	flags, err := ldflags()
 	if err != nil {

main.go

@@ -12,17 +12,31 @@ import (
 	"github.com/xuri/excelize/v2"
 	"golang.org/x/text/encoding/charmap"
 	"golang.org/x/text/transform"
+
+	"code.beautifulmachines.dev/jakoubek/csv2excel/internal/version"
 )
 
 func main() {
 	sep := flag.String("sep", "auto", "Trennzeichen: auto, ',', ';', '\\t'")
 	enc := flag.String("enc", "utf8", "Encoding: utf8, windows1252")
 	out := flag.String("o", "output.xlsx", "Ausgabedatei")
+	showVersion := flag.Bool("version", false, "Version anzeigen")
 	flag.Parse()
 
+	if *showVersion {
+		fmt.Printf("csv2excel %s (commit %s, built %s)\n", version.Version, version.Commit, version.BuildDate)
+		os.Exit(0)
+	}
+
+	// PowerShell kann "-o=testdatei.xlsx" in "-o=testdatei" + ".xlsx" splitten
+	if filepath.Ext(*out) == "" {
+		*out += ".xlsx"
+	}
+
 	files := flag.Args()
 	if len(files) == 0 {
-		fmt.Fprintln(os.Stderr, "Verwendung: csv2xlsx [flags] datei1.csv datei2.csv ...")
+		fmt.Fprintln(os.Stderr, "Verwendung: csv2excel [flags] datei1.csv datei2.csv ...")
+		fmt.Fprintln(os.Stderr, "Tipp: In PowerShell Leerzeichen statt = verwenden: -o ausgabe.xlsx")
 		os.Exit(1)
 	}
 
@@ -36,6 +50,19 @@ func run(files []string, out, sep, enc string) error {
 	xlsx := excelize.NewFile()
 	firstSheet := true
 
+	var csvFiles []string
+	for _, f := range files {
+		if strings.EqualFold(filepath.Ext(f), ".xlsx") {
+			fmt.Fprintf(os.Stderr, "Warnung: %s übersprungen – Excel-Datei als Input? Meintest du: -o=%s\n", f, f)
+			continue
+		}
+		csvFiles = append(csvFiles, f)
+	}
+	files = csvFiles
+	if len(files) == 0 {
+		return fmt.Errorf("keine CSV-Dateien zum Verarbeiten")
+	}
+
 	for _, path := range files {
 
 		sheetName := strings.TrimSuffix(filepath.Base(path), filepath.Ext(path))