[receiver/filelog][pkg/stanza] Prevent a lot of errors on windows if the path contains Junction (#20732)

* Prevent a lot of errors on windows if the path contains Junction

Author: gillg

.chloggen/filelogreceiver-fix-windows-symlinks.yaml

@@ -0,0 +1,16 @@
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: bug_fix
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: pkg/stanza
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Fix errors in loop evaluating file attributes on windows if the file path contains a Junction
+
+# One or more tracking issues related to the change
+issues: [21088]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:

pkg/stanza/fileconsumer/attributes.go

@@ -16,6 +16,7 @@ package fileconsumer // import "github.com/open-telemetry/opentelemetry-collecto
 
 import (
 	"path/filepath"
+	"runtime"
 
 	"go.uber.org/multierr"
 )
@@ -36,7 +37,15 @@ func (f *FileAttributes) HeaderAttributesCopy() map[string]any {
 // resolveFileAttributes resolves file attributes
 // and sets it to empty string in case of error
 func resolveFileAttributes(path string) (*FileAttributes, error) {
-	resolved, symErr := filepath.EvalSymlinks(path)
+	resolved := ""
+	var symErr error
+	// Dirty solution, waiting for this permanent fix https://github.com/golang/go/issues/39786
+	// EvalSymlinks on windows is partially working depending on the way you use Symlinks and Junctions
+	if runtime.GOOS != "windows" {
+		resolved, symErr = filepath.EvalSymlinks(path)
+	} else {
+		resolved = path
+	}
 	abs, absErr := filepath.Abs(resolved)
 
 	return &FileAttributes{