remove use of github.com/pkg/errors

This commit removes all uses of `github.com/pkg/errors.Wrap` and
replaces them by appropriate calls to `fmt.Errorf()`. Other calls are
also migrated to the standard library.

README.md

@@ -439,10 +439,12 @@ ggman comes with the following builtin aliases:
 ### 1.23.0 (Upcoming)
 
 - update dependencies to latest
+- use standard library packages where available
+- update to `goprogram` 0.7.0
 - minor linting updates
 - minor performance improvements
 - explicitly handle output errors
-- update to `goprogram` 0.7.0
+
 
 ### 1.22.0 (Released [Sep 22 2024](https://github.com/tkw1536/ggman/releases/tag/v1.22.0))
 

env/canfile.go

@@ -3,10 +3,10 @@ package env
 //spellchecker:words bufio strings github errors
 import (
 	"bufio"
+	"errors"
+	"fmt"
 	"io"
 	"strings"
-
-	"github.com/pkg/errors"
 )
 
 //spellchecker:words canfile
@@ -18,7 +18,10 @@ type CanLine struct {
 }
 
 // ErrEmpty is an error representing an empty CanLine
-var ErrEmpty = errors.New("CanLine is empty")
+var ErrEmpty = errors.New("CanLine.Unmarshal: CanLine is empty")
+
+// ErrEmptyFields is an error indicating that unmarshaling a CanLine failed
+var ErrEmptyFields = errors.New("CanLine.Unmarshal: strings.Fields() unexpectedly returned 0-length slice")
 
 // Unmarshal reads a CanLine from a string
 func (cl *CanLine) Unmarshal(s string) error {
@@ -35,7 +38,7 @@ func (cl *CanLine) Unmarshal(s string) error {
 	// switch based on the length
 	switch len(fields) {
 	case 0:
-		return errors.Errorf("strings.Fields() unexpectedly returned 0-length slice")
+		return ErrEmptyFields
 	case 1:
 		fields = []string{"", fields[0]}
 	}
@@ -66,12 +69,15 @@ func (cf *CanFile) ReadFrom(reader io.Reader) (int64, error) {
 
 		var line CanLine
 		if err := line.Unmarshal(text); err != nil {
-			return bytes, errors.Wrap(err, "Unable to parse CANFILE line")
+			return bytes, fmt.Errorf("unable to parse CANFILE line: %w", err)
 		}
 		*cf = append(*cf, line)
 	}
 
-	return bytes, errors.Wrap(scanner.Err(), "Unable to read CANFILE")
+	if err := scanner.Err(); err != nil {
+		return bytes, fmt.Errorf("unable to read CANFILE: %w", err)
+	}
+	return bytes, nil
 }
 
 var defaultCanFile = []string{

env/env.go

@@ -2,12 +2,13 @@ package env
 
 //spellchecker:words path filepath strings github errors ggman internal walker goprogram exit pkglib
 import (
+	"errors"
+	"fmt"
 	"io/fs"
 	"os"
 	"path/filepath"
 	"strings"
 
-	"github.com/pkg/errors"
 	"github.com/tkw1536/ggman/git"
 	"github.com/tkw1536/ggman/internal/path"
 	"github.com/tkw1536/ggman/internal/walker"
@@ -183,7 +184,7 @@ func (env *Env) LoadDefaultCANFILE() (CanFile, error) {
 		case errors.Is(err, fs.ErrNotExist):
 			continue
 		default:
-			return nil, errors.Wrapf(err, "Unable to open CANFILE %q", file)
+			return nil, fmt.Errorf("unable to open CANFILE %q: %w", file, err)
 		}
 		defer f.Close()
 		if _, err := cf.ReadFrom(f); err != nil {
@@ -424,3 +425,5 @@ func (env Env) ScanRepos(folder string, resolved bool) ([]string, error) {
 	results, _, err := env.ScanReposScores(folder, resolved)
 	return results, err
 }
+
+// spellchecker:words nosec

env/flags.go

@@ -3,10 +3,10 @@ package env
 //spellchecker:words bufio strings github errors goprogram exit pkglib
 import (
 	"bufio"
+	"fmt"
 	"os"
 	"strings"
 
-	"github.com/pkg/errors"
 	"github.com/tkw1536/goprogram/exit"
 	"github.com/tkw1536/pkglib/fsx"
 )
@@ -115,13 +115,13 @@ func (env Env) NewFromFileFilter(p string, fuzzy bool) (filters []Filter, err er
 	// resolve the path
 	path, err := env.Abs(p)
 	if err != nil {
-		return nil, errors.Wrapf(err, "Unable to resolve path %q", p)
+		return nil, fmt.Errorf("unable to resolve path %q: %w", p, err)
 	}
 
 	// open the file
 	file, err := os.Open(path) /* #nosec G304 -- explicitly passed as a parameter */
 	if err != nil {
-		return nil, errors.Wrapf(err, "Unable to open path %q", p)
+		return nil, fmt.Errorf("unable to open path %q: %w", p, err)
 	}
 	defer file.Close()
 
@@ -138,7 +138,7 @@ func (env Env) NewFromFileFilter(p string, fuzzy bool) (filters []Filter, err er
 	}
 
 	if err = scanner.Err(); err != nil {
-		return nil, errors.Wrapf(err, "Unable to read file %q", p)
+		return nil, fmt.Errorf("unable to read file %q: %w", p, err)
 	}
 
 	return filters, nil
@@ -159,7 +159,7 @@ func (env Env) ResolvePathFilter(p string) (path string, err error) {
 	// sub-repositories contained in a path
 	path, err = env.Abs(p)
 	if err != nil {
-		return "", errors.Wrapf(err, "Unable to resolve path %q", p)
+		return "", fmt.Errorf("unable to resolve path %q: %w", p, err)
 	}
 
 	// must be a directory!
@@ -169,3 +169,5 @@ func (env Env) ResolvePathFilter(p string) (path string, err error) {
 
 	return
 }
+
+// spellchecker:words nosec