cleanup: Replace use of os.IsNotExist(err) with errors.Is(err, fs.ErrNotExist)

cmd/incus-agent/exec.go

@@ -360,7 +360,7 @@ func (s *execWs) Do(op *operations.Operation) error {
 	if err != nil {
 		exitStatus := -1
 
-		if errors.Is(err, exec.ErrNotFound) || os.IsNotExist(err) {
+		if errors.Is(err, exec.ErrNotFound) || errors.Is(err, fs.ErrNotExist) {
 			exitStatus = 127
 		} else if errors.Is(err, fs.ErrPermission) {
 			exitStatus = 126

cmd/incus-agent/network.go

@@ -3,6 +3,8 @@ package main
 import (
 	"crypto/tls"
 	"encoding/json"
+	"errors"
+	"io/fs"
 	"net"
 	"os"
 	"path/filepath"
@@ -65,7 +67,7 @@ func reconfigureNetworkInterfaces() {
 	nicDirEntries, err := os.ReadDir(deviceConfig.NICConfigDir)
 	if err != nil {
 		// Abort if configuration folder does not exist (nothing to do), otherwise log and return.
-		if os.IsNotExist(err) {
+		if errors.Is(err, fs.ErrNotExist) {
 			return
 		}
 

cmd/incus-simplestreams/main_add.go

@@ -5,8 +5,10 @@ import (
 	"context"
 	"crypto/sha256"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
+	"io/fs"
 	"os"
 	"strings"
 	"time"
@@ -291,7 +293,7 @@ func (c *cmdAdd) Run(cmd *cobra.Command, args []string) error {
 
 	body, err = os.ReadFile("streams/v1/images.json")
 	if err != nil {
-		if !os.IsNotExist(err) {
+		if !errors.Is(err, fs.ErrNotExist) {
 			return err
 		}
 

cmd/incus-simplestreams/main_remove.go

@@ -2,7 +2,9 @@ package main
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
+	"io/fs"
 	"os"
 
 	"github.com/spf13/cobra"
@@ -39,7 +41,7 @@ func (c *cmdRemove) remove(path string) error {
 	}
 
 	err := os.Remove(path)
-	if err != nil && !os.IsNotExist(err) {
+	if err != nil && !errors.Is(err, fs.ErrNotExist) {
 		return err
 	}
 
@@ -97,7 +99,7 @@ func (c *cmdRemove) Run(cmd *cobra.Command, args []string) error {
 				} else if metaEntry.CombinedSha256SquashFs == image.Fingerprint {
 					// Deleting a container image.
 					err = c.remove(version.Items["squashfs"].Path)
-					if err != nil && !os.IsNotExist(err) {
+					if err != nil && !errors.Is(err, fs.ErrNotExist) {
 						return err
 					}
 

cmd/incus-simplestreams/main_verify.go

@@ -3,8 +3,10 @@ package main
 import (
 	"crypto/sha256"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
+	"io/fs"
 	"os"
 
 	"github.com/spf13/cobra"
@@ -47,7 +49,7 @@ func (c *cmdVerify) Run(cmd *cobra.Command, args []string) error {
 
 	body, err := os.ReadFile("streams/v1/images.json")
 	if err != nil {
-		if os.IsNotExist(err) {
+		if errors.Is(err, fs.ErrNotExist) {
 			return nil
 		}
 
@@ -67,7 +69,7 @@ func (c *cmdVerify) Run(cmd *cobra.Command, args []string) error {
 				// Open the data.
 				dataFile, err := os.Open(item.Path)
 				if err != nil {
-					if os.IsNotExist(err) {
+					if errors.Is(err, fs.ErrNotExist) {
 						return fmt.Errorf("Missing image file %q", item.Path)
 					}
 

cmd/incus/file.go

@@ -3,8 +3,10 @@ package main
 import (
 	"bytes"
 	"context"
+	"errors"
 	"fmt"
 	"io"
+	"io/fs"
 	"math/rand"
 	"net"
 	"os"
@@ -451,7 +453,7 @@ func (c *cmdFilePull) Run(cmd *cobra.Command, args []string) error {
 
 	targetIsDir := false
 	sb, err := os.Stat(target)
-	if err != nil && !os.IsNotExist(err) {
+	if err != nil && !errors.Is(err, fs.ErrNotExist) {
 		return err
 	}
 

cmd/incusd/api.go

@@ -2,6 +2,8 @@ package main
 
 import (
 	"context"
+	"errors"
+	"io/fs"
 	"net/http"
 	"net/http/httputil"
 	"net/url"
@@ -423,10 +425,11 @@ type uiHttpDir struct {
 	http.FileSystem
 }
 
-func (fs uiHttpDir) Open(name string) (http.File, error) {
-	fsFile, err := fs.FileSystem.Open(name)
-	if err != nil && os.IsNotExist(err) {
-		return fs.FileSystem.Open("index.html")
+// Open is part of the http.FileSystem interface.
+func (httpFS uiHttpDir) Open(name string) (http.File, error) {
+	fsFile, err := httpFS.FileSystem.Open(name)
+	if err != nil && errors.Is(err, fs.ErrNotExist) {
+		return httpFS.FileSystem.Open("index.html")
 	}
 
 	return fsFile, err
@@ -436,10 +439,11 @@ type documentationHttpDir struct {
 	http.FileSystem
 }
 
-func (fs documentationHttpDir) Open(name string) (http.File, error) {
-	fsFile, err := fs.FileSystem.Open(name)
-	if err != nil && os.IsNotExist(err) {
-		return fs.FileSystem.Open("index.html")
+// Open is part of the http.FileSystem interface.
+func (httpFS documentationHttpDir) Open(name string) (http.File, error) {
+	fsFile, err := httpFS.FileSystem.Open(name)
+	if err != nil && errors.Is(err, fs.ErrNotExist) {
+		return httpFS.FileSystem.Open("index.html")
 	}
 
 	return fsFile, err

cmd/incusd/images.go

@@ -9,6 +9,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"io/fs"
 	"math"
 	"math/rand"
 	"mime"
@@ -2623,14 +2624,14 @@ func pruneExpiredImages(ctx context.Context, s *state.State, op *operations.Oper
 		// Remove main image file.
 		fname := filepath.Join(s.OS.VarDir, "images", fingerprint)
 		err = os.Remove(fname)
-		if err != nil && !os.IsNotExist(err) {
+		if err != nil && !errors.Is(err, fs.ErrNotExist) {
 			return fmt.Errorf("Error deleting image file %q: %w", fname, err)
 		}
 
 		// Remove the rootfs file for the image.
 		fname = filepath.Join(s.OS.VarDir, "images", fingerprint) + ".rootfs"
 		err = os.Remove(fname)
-		if err != nil && !os.IsNotExist(err) {
+		if err != nil && !errors.Is(err, fs.ErrNotExist) {
 			return fmt.Errorf("Error deleting image file %q: %w", fname, err)
 		}
 
@@ -2856,7 +2857,7 @@ func imageDeleteFromDisk(fingerprint string) {
 	fname := internalUtil.VarPath("images", fingerprint)
 	if util.PathExists(fname) {
 		err := os.Remove(fname)
-		if err != nil && !os.IsNotExist(err) {
+		if err != nil && !errors.Is(err, fs.ErrNotExist) {
 			logger.Errorf("Error deleting image file %s: %s", fname, err)
 		}
 	}
@@ -2865,7 +2866,7 @@ func imageDeleteFromDisk(fingerprint string) {
 	fname = internalUtil.VarPath("images", fingerprint) + ".rootfs"
 	if util.PathExists(fname) {
 		err := os.Remove(fname)
-		if err != nil && !os.IsNotExist(err) {
+		if err != nil && !errors.Is(err, fs.ErrNotExist) {
 			logger.Errorf("Error deleting image file %s: %s", fname, err)
 		}
 	}

cmd/incusd/instances.go

@@ -2,7 +2,9 @@ package main
 
 import (
 	"context"
+	"errors"
 	"fmt"
+	"io/fs"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -326,12 +328,12 @@ func instancesOnDisk(s *state.State) ([]instance.Instance, error) {
 	instanceTypeNames := make(map[instancetype.Type][]os.DirEntry, 2)
 
 	instanceTypeNames[instancetype.Container], err = os.ReadDir(instancePaths[instancetype.Container])
-	if err != nil && !os.IsNotExist(err) {
+	if err != nil && !errors.Is(err, fs.ErrNotExist) {
 		return nil, err
 	}
 
 	instanceTypeNames[instancetype.VM], err = os.ReadDir(instancePaths[instancetype.VM])
-	if err != nil && !os.IsNotExist(err) {
+	if err != nil && !errors.Is(err, fs.ErrNotExist) {
 		return nil, err
 	}
 

cmd/incusd/main_forkproxy.go

@@ -241,8 +241,10 @@ void forkproxy(void)
 import "C"
 
 import (
+	"errors"
 	"fmt"
 	"io"
+	"io/fs"
 	"net"
 	"os"
 	"os/signal"
@@ -453,7 +455,7 @@ func (c *cmdForkproxy) Run(cmd *cobra.Command, args []string) error {
 
 		if lAddr.ConnType == "unix" && !lAddr.Abstract {
 			err := os.Remove(lAddr.Address)
-			if err != nil && !os.IsNotExist(err) {
+			if err != nil && !errors.Is(err, fs.ErrNotExist) {
 				return err
 			}
 		}

cmd/lxd-to-incus/main.go

@@ -3,7 +3,9 @@ package main
 import (
 	"bufio"
 	"encoding/json"
+	"errors"
 	"fmt"
+	"io/fs"
 	"os"
 	"path/filepath"
 	"slices"
@@ -575,19 +577,19 @@ Instead this tool will be providing specific commands for each of the servers.`)
 	_, _ = logFile.WriteString("Wiping the target server\n")
 
 	err = os.RemoveAll(targetPaths.logs)
-	if err != nil && !os.IsNotExist(err) {
+	if err != nil && !errors.Is(err, fs.ErrNotExist) {
 		_, _ = logFile.WriteString(fmt.Sprintf("ERROR: %v\n", err))
 		return fmt.Errorf("Failed to remove %q: %w", targetPaths.logs, err)
 	}
 
 	err = os.RemoveAll(targetPaths.cache)
-	if err != nil && !os.IsNotExist(err) {
+	if err != nil && !errors.Is(err, fs.ErrNotExist) {
 		_, _ = logFile.WriteString(fmt.Sprintf("ERROR: %v\n", err))
 		return fmt.Errorf("Failed to remove %q: %w", targetPaths.cache, err)
 	}
 
 	err = os.RemoveAll(targetPaths.daemon)
-	if err != nil && !os.IsNotExist(err) {
+	if err != nil && !errors.Is(err, fs.ErrNotExist) {
 		_, _ = logFile.WriteString(fmt.Sprintf("ERROR: %v\n", err))
 		return fmt.Errorf("Failed to remove %q: %w", targetPaths.daemon, err)
 	}
@@ -713,7 +715,7 @@ Instead this tool will be providing specific commands for each of the servers.`)
 
 		_ = unix.Unmount(filepath.Join(targetPaths.daemon, dir), unix.MNT_DETACH)
 		err = os.RemoveAll(filepath.Join(targetPaths.daemon, dir))
-		if err != nil && !os.IsNotExist(err) {
+		if err != nil && !errors.Is(err, fs.ErrNotExist) {
 			_, _ = logFile.WriteString(fmt.Sprintf("ERROR: %v\n", err))
 			return fmt.Errorf("Failed to delete %q: %w", dir, err)
 		}
@@ -722,7 +724,7 @@ Instead this tool will be providing specific commands for each of the servers.`)
 	for _, dir := range []string{"containers", "containers-snapshots", "snapshots", "virtual-machines", "virtual-machines-snapshots"} {
 		entries, err := os.ReadDir(filepath.Join(targetPaths.daemon, dir))
 		if err != nil {
-			if os.IsNotExist(err) {
+			if errors.Is(err, fs.ErrNotExist) {
 				continue
 			}
 

internal/server/apparmor/apparmor.go

@@ -2,8 +2,10 @@ package apparmor
 
 import (
 	"crypto/sha256"
+	"errors"
 	"fmt"
 	"io"
+	"io/fs"
 	"os"
 	"path/filepath"
 	"strings"
@@ -114,7 +116,7 @@ func deleteNamespace(sysOS *sys.OS, name string) error {
 
 	p := filepath.Join("/sys/kernel/security/apparmor/policy/namespaces", name)
 	err := os.Remove(p)
-	if err != nil && !os.IsNotExist(err) {
+	if err != nil && !errors.Is(err, fs.ErrNotExist) {
 		return err
 	}
 
@@ -195,12 +197,12 @@ func deleteProfile(sysOS *sys.OS, fullName string, name string) error {
 	}
 
 	err = os.Remove(filepath.Join(aaCacheDir, name))
-	if err != nil && !os.IsNotExist(err) {
+	if err != nil && !errors.Is(err, fs.ErrNotExist) {
 		return fmt.Errorf("Failed to remove %s: %w", filepath.Join(aaCacheDir, name), err)
 	}
 
 	err = os.Remove(filepath.Join(aaPath, "profiles", name))
-	if err != nil && !os.IsNotExist(err) {
+	if err != nil && !errors.Is(err, fs.ErrNotExist) {
 		return fmt.Errorf("Failed to remove %s: %w", filepath.Join(aaPath, "profiles", name), err)
 	}
 

internal/server/apparmor/instance.go

@@ -1,7 +1,9 @@
 package apparmor
 
 import (
+	"errors"
 	"fmt"
+	"io/fs"
 	"os"
 	"path/filepath"
 	"strings"
@@ -123,7 +125,7 @@ func instanceProfileGenerate(sysOS *sys.OS, inst instance, extraBinaries []strin
 	 */
 	profile := filepath.Join(aaPath, "profiles", instanceProfileFilename(inst))
 	content, err := os.ReadFile(profile)
-	if err != nil && !os.IsNotExist(err) {
+	if err != nil && !errors.Is(err, fs.ErrNotExist) {
 		return err
 	}
 

internal/server/apparmor/instance_forkproxy.go

@@ -1,7 +1,9 @@
 package apparmor
 
 import (
+	"errors"
 	"fmt"
+	"io/fs"
 	"os"
 	"path/filepath"
 	"slices"
@@ -170,7 +172,7 @@ func ForkproxyLoad(sysOS *sys.OS, inst instance, dev device) error {
 	 */
 	profile := filepath.Join(aaPath, "profiles", forkproxyProfileFilename(inst, dev))
 	content, err := os.ReadFile(profile)
-	if err != nil && !os.IsNotExist(err) {
+	if err != nil && !errors.Is(err, fs.ErrNotExist) {
 		return err
 	}
 

internal/server/apparmor/network.go

@@ -1,6 +1,8 @@
 package apparmor
 
 import (
+	"errors"
+	"io/fs"
 	"os"
 	"path/filepath"
 
@@ -30,7 +32,7 @@ func NetworkLoad(sysOS *sys.OS, n network) error {
 	// dnsmasq
 	profile := filepath.Join(aaPath, "profiles", dnsmasqProfileFilename(n))
 	content, err := os.ReadFile(profile)
-	if err != nil && !os.IsNotExist(err) {
+	if err != nil && !errors.Is(err, fs.ErrNotExist) {
 		return err
 	}