fix: fallback to kpkgEnvPath for kreato-release when root doesn't have it

Author: kreatoo

kpkg/commands/installcmd.nim

@@ -175,6 +175,13 @@ proc installPkg*(repo: string, package: string, root: string, runf = runFile(
   debug "installPkg ran, repo: '"&repo&"', package: '"&package&"', root: '"&root&"', manualInstallList: '"&manualInstallList.join(
       " ")&"', kTarget: '"&kTarget&"'"
 
+  # If the target root doesn't have /etc/kreato-release (e.g. sandbox upperDir),
+  # fall back to the env path so kpkgTarget() can still read it.
+  let kreatoReleasePath = if fileExists(root & "/etc/kreato-release"):
+    root & "/etc/kreato-release"
+  else:
+    kpkgEnvPath & "/etc/kreato-release"
+
   let isUpgradeActual = (packageExists(package, root) and getPackage(package,
           root).version != pkg.versionString) or isUpgrade
 
@@ -249,7 +256,7 @@ proc installPkg*(repo: string, package: string, root: string, runf = runFile(
             if backupPath != "":
               tx.recordFileDeleted(fullPath, backupPath)
 
-        if kTarget != kpkgTarget(root):
+        if kTarget != kpkgTarget(root, releasePath = kreatoReleasePath):
           removeInternal(i, root, initCheck = false)
         else:
           removeInternal(i, root)
@@ -269,7 +276,7 @@ proc installPkg*(repo: string, package: string, root: string, runf = runFile(
             tx.recordFileDeleted(fullPath, backupPath)
 
       # Remove old package from database (but files are backed up)
-      if kTarget != kpkgTarget(root):
+      if kTarget != kpkgTarget(root, releasePath = kreatoReleasePath):
         removeInternal(package, root, ignoreReplaces = true,
                 noRunfile = true, initCheck = false)
       else:

kpkg/modules/commonTasks.nim

@@ -137,9 +137,11 @@ proc systemTarget*(root: string): string =
   return target
 
 
-proc kpkgTarget*(root: string, customTarget = ""): string =
+proc kpkgTarget*(root: string, customTarget = "", releasePath = ""): string =
   ## Returns the kpkg target.
-  let conf = loadConfig(root&"/etc/kreato-release")
+  let releaseFile = if releasePath.len >
+      0: releasePath else: root&"/etc/kreato-release"
+  let conf = loadConfig(releaseFile)
   var system: string
   if not isEmptyOrWhitespace(customTarget):
     system = customTarget