feat: wrap ErrNoConfigEntry to report missing key

Resolves #935.

5 files changed, 12 insertions, 11 deletions

diff --git a/repository/config.go b/repository/config.go
index c6880b7d..4d6a8c6c 100644
--- a/repository/config.go
+++ b/repository/config.go
@@ -96,7 +96,7 @@ func (m *mergedConfig) ReadBool(key string) (bool, error) {
 	if err == nil {
 		return v, nil
 	}
-	if err != ErrNoConfigEntry && err != ErrMultipleConfigEntry {
+	if !errors.Is(err, ErrNoConfigEntry) && err != ErrMultipleConfigEntry {
 		return false, err
 	}
 	return m.global.ReadBool(key)
@@ -107,7 +107,7 @@ func (m *mergedConfig) ReadString(key string) (string, error) {
 	if err == nil {
 		return val, nil
 	}
-	if err != ErrNoConfigEntry && err != ErrMultipleConfigEntry {
+	if !errors.Is(err, ErrNoConfigEntry) && err != ErrMultipleConfigEntry {
 		return "", err
 	}
 	return m.global.ReadString(key)
@@ -118,7 +118,7 @@ func (m *mergedConfig) ReadTimestamp(key string) (time.Time, error) {
 	if err == nil {
 		return val, nil
 	}
-	if err != ErrNoConfigEntry && err != ErrMultipleConfigEntry {
+	if !errors.Is(err, ErrNoConfigEntry) && err != ErrMultipleConfigEntry {
 		return time.Time{}, err
 	}
 	return m.global.ReadTimestamp(key)
diff --git a/repository/config_mem.go b/repository/config_mem.go
index 019bc111..bc532373 100644
--- a/repository/config_mem.go
+++ b/repository/config_mem.go
@@ -49,7 +49,7 @@ func (mc *MemConfig) ReadString(key string) (string, error) {
 	key = normalizeKey(key)
 	val, ok := mc.config[key]
 	if !ok {
-		return "", ErrNoConfigEntry
+		return "", fmt.Errorf("%w: missing key %s", ErrNoConfigEntry, key)
 	}
 
 	return val, nil
diff --git a/repository/config_testing.go b/repository/config_testing.go
index f8a2762b..8c22934a 100644
--- a/repository/config_testing.go
+++ b/repository/config_testing.go
@@ -53,7 +53,7 @@ func testConfig(t *testing.T, config Config) {
 	}, configs)
 
 	_, err = config.ReadBool("section.true")
-	require.Equal(t, ErrNoConfigEntry, err)
+	require.ErrorIs(t, err, ErrNoConfigEntry)
 
 	err = config.RemoveAll("section.nonexistingkey")
 	require.Error(t, err)
@@ -62,7 +62,7 @@ func testConfig(t *testing.T, config Config) {
 	require.NoError(t, err)
 
 	_, err = config.ReadString("section.key")
-	require.Equal(t, ErrNoConfigEntry, err)
+	require.ErrorIs(t, err, ErrNoConfigEntry)
 
 	err = config.RemoveAll("nonexistingsection")
 	require.Error(t, err)
diff --git a/repository/gogit.go b/repository/gogit.go
index c1f1fe37..35934c91 100644
--- a/repository/gogit.go
+++ b/repository/gogit.go
@@ -2,6 +2,7 @@ package repository
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -270,7 +271,7 @@ func (repo *GoGitRepo) GetCoreEditor() (string, error) {
 	if err == nil && val != "" {
 		return val, nil
 	}
-	if err != nil && err != ErrNoConfigEntry {
+	if err != nil && !errors.Is(err, ErrNoConfigEntry) {
 		return "", err
 	}
 
diff --git a/repository/gogit_config.go b/repository/gogit_config.go
index 891e3ffb..87141e9d 100644
--- a/repository/gogit_config.go
+++ b/repository/gogit_config.go
@@ -119,7 +119,7 @@ func (cr *goGitConfigReader) ReadString(key string) (string, error) {
 
 	sectionName := split[0]
 	if !cfg.Raw.HasSection(sectionName) {
-		return "", ErrNoConfigEntry
+		return "", fmt.Errorf("%w: missing key %s", ErrNoConfigEntry, key)
 	}
 	section := cfg.Raw.Section(sectionName)
 
@@ -127,7 +127,7 @@ func (cr *goGitConfigReader) ReadString(key string) (string, error) {
 	case len(split) == 2:
 		optionName := split[1]
 		if !section.HasOption(optionName) {
-			return "", ErrNoConfigEntry
+			return "", fmt.Errorf("%w: missing key %s", ErrNoConfigEntry, key)
 		}
 		if len(section.OptionAll(optionName)) > 1 {
 			return "", ErrMultipleConfigEntry
@@ -137,11 +137,11 @@ func (cr *goGitConfigReader) ReadString(key string) (string, error) {
 		subsectionName := strings.Join(split[1:len(split)-1], ".")
 		optionName := split[len(split)-1]
 		if !section.HasSubsection(subsectionName) {
-			return "", ErrNoConfigEntry
+			return "", fmt.Errorf("%w: missing key %s", ErrNoConfigEntry, key)
 		}
 		subsection := section.Subsection(subsectionName)
 		if !subsection.HasOption(optionName) {
-			return "", ErrNoConfigEntry
+			return "", fmt.Errorf("%w: missing key %s", ErrNoConfigEntry, key)
 		}
 		if len(subsection.OptionAll(optionName)) > 1 {
 			return "", ErrMultipleConfigEntry