podman-remote build should handle -f option properly

podman-remote build has to handle multiple different locations
for the Containerfile.  Currently this works in local mode but not
when using podman-remote.

Fixes: https://github.com/containers/podman/issues/9871

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

1 files changed, 42 insertions, 22 deletions

diff --git a/pkg/bindings/images/build.go b/pkg/bindings/images/build.go
index 346d55c47..c7d432b16 100644
--- a/pkg/bindings/images/build.go
+++ b/pkg/bindings/images/build.go
@@ -282,10 +282,6 @@ func Build(ctx context.Context, containerFiles []string, options entities.BuildO
 		stdout = options.Out
 	}
 
-	entries := make([]string, len(containerFiles))
-	copy(entries, containerFiles)
-	entries = append(entries, options.ContextDirectory)
-
 	excludes := options.Excludes
 	if len(excludes) == 0 {
 		excludes, err = parseDockerignore(options.ContextDirectory)
@@ -294,33 +290,57 @@ func Build(ctx context.Context, containerFiles []string, options entities.BuildO
 		}
 	}
 
-	tarfile, err := nTar(excludes, entries...)
+	contextDir, err := filepath.Abs(options.ContextDirectory)
 	if err != nil {
-		logrus.Errorf("cannot tar container entries %v error: %v", entries, err)
+		logrus.Errorf("cannot find absolute path of %v: %v", options.ContextDirectory, err)
 		return nil, err
 	}
-	defer func() {
-		if err := tarfile.Close(); err != nil {
-			logrus.Errorf("%v\n", err)
+
+	tarContent := []string{options.ContextDirectory}
+	newContainerFiles := []string{}
+	for _, c := range containerFiles {
+		containerfile, err := filepath.Abs(c)
+		if err != nil {
+			logrus.Errorf("cannot find absolute path of %v: %v", c, err)
+			return nil, err
 		}
-	}()
 
-	containerFile, err := filepath.Abs(entries[0])
-	if err != nil {
-		logrus.Errorf("cannot find absolute path of %v: %v", entries[0], err)
-		return nil, err
+		// Check if Containerfile is in the context directory, if so truncate the contextdirectory off path
+		// Do NOT add to tarfile
+		if strings.HasPrefix(containerfile, contextDir+string(filepath.Separator)) {
+			containerfile = strings.TrimPrefix(containerfile, contextDir+string(filepath.Separator))
+		} else {
+			// If Containerfile does not exists assume it is in context directory, do Not add to tarfile
+			if _, err := os.Lstat(containerfile); err != nil {
+				if !os.IsNotExist(err) {
+					return nil, err
+				}
+				containerfile = c
+			} else {
+				// If Containerfile does exists but is not in context directory add it to the tarfile
+				tarContent = append(tarContent, containerfile)
+			}
+		}
+		newContainerFiles = append(newContainerFiles, containerfile)
 	}
-	contextDir, err := filepath.Abs(entries[1])
-	if err != nil {
-		logrus.Errorf("cannot find absolute path of %v: %v", entries[1], err)
-		return nil, err
+	if len(newContainerFiles) > 0 {
+		cFileJSON, err := json.Marshal(newContainerFiles)
+		if err != nil {
+			return nil, err
+		}
+		params.Set("dockerfile", string(cFileJSON))
 	}
 
-	if strings.HasPrefix(containerFile, contextDir+string(filepath.Separator)) {
-		containerFile = strings.TrimPrefix(containerFile, contextDir+string(filepath.Separator))
+	tarfile, err := nTar(excludes, tarContent...)
+	if err != nil {
+		logrus.Errorf("cannot tar container entries %v error: %v", tarContent, err)
+		return nil, err
 	}
-
-	params.Set("dockerfile", containerFile)
+	defer func() {
+		if err := tarfile.Close(); err != nil {
+			logrus.Errorf("%v\n", err)
+		}
+	}()
 
 	conn, err := bindings.GetClient(ctx)
 	if err != nil {