Class: Yast::FileChangesClass

Inherits:
Module
  • Object
show all
Defined in:
library/system/src/modules/FileChanges.rb

Instance Method Summary collapse

Instance Method Details

#CheckFiles(files) ⇒ Boolean

Check files if any of them were changed Issue a question whether to continue if some were chaned

Parameters:

  • files (Array<String>)

    a list of files to check

Returns:

  • (Boolean)

    true if either none was changed or user agreed to continue



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# File 'library/system/src/modules/FileChanges.rb', line 170

def CheckFiles(files)
  files = deep_copy(files)
  files = Builtins.filter(files) { |f| FileChanged(f) }

  return true unless Ops.greater_than(Builtins.size(files), 0)

  msg = n_(
    # Continue/Cancel question, %1 is a coma separated list of file names
    _("Files %1 have been changed manually.\nYaST might lose some of the changes"),
    # Continue/Cancel question, %1 is a file name
    _("File %1 has been changed manually.\nYaST might lose some of the changes.\n"),
    files.size
  )

  msg = Builtins.sformat(msg, Builtins.mergestring(files, ", "))
  popup_file = "/filechecks_non_verbose"

  stat = SCR.Read(path(".target.stat"), Ops.add(Directory.vardir, popup_file))
  return true unless stat == {}

  content = VBox(
    Label(msg),
    Left(CheckBox(Id(:disable), _("Do not show this message anymore"))),
    ButtonBox(
      PushButton(Id(:ok), Opt(:okButton), Label.ContinueButton),
      PushButton(Id(:cancel), Opt(:cancelButton), Label.CancelButton)
    )
  )
  UI.OpenDialog(content)
  UI.SetFocus(:ok)

  ret = UI.UserInput
  Builtins.y2milestone("ret = %1", ret)

  if ret == :ok && Convert.to_boolean(UI.QueryWidget(:disable, :Value))
    Builtins.y2milestone("Disabled checksum popups")
    SCR.Write(
      path(".target.string"),
      Ops.add(Directory.vardir, popup_file),
      ""
    )
  end
  UI.CloseDialog
  ret == :ok
end

#CheckNewCreatedFiles(files) ⇒ Boolean

Check if any of the possibly new created files is really new Issue a question whether to continue if such file was manually created

Parameters:

  • files (Array<String>)

    a list of files to check

Returns:

  • (Boolean)

    true if either none was changed or user agreed to continue



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# File 'library/system/src/modules/FileChanges.rb', line 230

def CheckNewCreatedFiles(files)
  new_files = created_files(files)

  return true if new_files.empty?

  # TRANSLATORS: Continue/Cancel question, %s is a single file name or
  # a comma separated list of file names.
  msg = n_(
    "File %s has been created manually.\nYaST might lose this file.",
    "Files %s have been created manually.\nYaST might lose these files.",
    new_files.size
  ) % new_files.join(", ")

  popup_file = "/filechecks_non_verbose"
  popup_file_path = File.join(Directory.vardir, popup_file)

  return true if FileUtils.Exists(popup_file_path)

  content = VBox(
    Label(msg),
    Left(CheckBox(Id(:disable), Message.DoNotShowMessageAgain())),
    ButtonBox(
      PushButton(Id(:ok), Opt(:okButton), Label.ContinueButton()),
      PushButton(Id(:cancel), Opt(:cancelButton), Label.CancelButton())
    )
  )
  UI.OpenDialog(content)
  UI.SetFocus(:ok)
  ret = UI.UserInput
  Builtins.y2milestone("ret = %1", ret)
  if ret == :ok && UI.QueryWidget(:disable, :Value)
    Builtins.y2milestone("Disabled checksum popups")
    SCR.Write(
      path(".target.string"),
      popup_file_path,
      ""
    )
  end
  UI.CloseDialog
  ret == :ok
end

#ComputeFileChecksum(file) ⇒ String

Compute the checksum of a file

Parameters:

  • file (String)

    string the file to compute checksum of

Returns:



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# File 'library/system/src/modules/FileChanges.rb', line 96

def ComputeFileChecksum(file)
  # See also FileUtils::MD5sum()
  cmd = Builtins.sformat("/usr/bin/md5sum %1", file)
  out = Convert.to_map(SCR.Execute(path(".target.bash_output"), cmd))
  # note: it also contains file name, but since it is only to be compared
  # it does not matter
  sum = Ops.get_string(out, "stdout", "")
  sum
end

#created_files(files) ⇒ Array<String>

Files that are really new

Parameters:

  • files (Array<String>)

    candidate files that may be new

Returns:



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# File 'library/system/src/modules/FileChanges.rb', line 220

def created_files(files)
  files - @file_checksums.keys
end

#FileChanged(file) ⇒ Boolean

Check if a file was modified externally (without YaST)

Parameters:

  • file (String)

    string boolean the file to check

Returns:

  • (Boolean)

    true if was changed externally



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# File 'library/system/src/modules/FileChanges.rb', line 137

def FileChanged(file)
  # when generating AutoYaST configuration, they are not written back
  return false if Mode.config
  ReadSettings()
  ret = false
  if Builtins.haskey(@file_checksums, file)
    Builtins.y2milestone("Comparing file %1 to stored checksum", file)
    sum = ComputeFileChecksum(file)
    ret = !(sum == Ops.get(@file_checksums, file, ""))
  else
    Builtins.y2milestone("Comparing file %1 to RPM database", file)
    ret = FileChangedFromPackage(file)
  end
  Builtins.y2milestone("File differs: %1", ret)
  ret
end

#FileChangedFromPackage(file) ⇒ Boolean

Check if file was modified compared to the one distributed with the RPM package

Parameters:

  • file (String)

    string the file to check

Returns:

  • (Boolean)

    true of was changed



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# File 'library/system/src/modules/FileChanges.rb', line 110

def FileChangedFromPackage(file)
  # queryformat: no trailing newline!
  cmd = Builtins.sformat(
    "/bin/rpm -qf %1 --qf %%{NAME}-%%{VERSION}-%%{RELEASE}",
    file
  )
  out = Convert.to_map(SCR.Execute(path(".target.bash_output"), cmd))
  package = Ops.get_string(out, "stdout", "")
  Builtins.y2milestone("Package owning %1: %2", file, package)
  return false if package == "" || Ops.get_integer(out, "exit", -1) != 0
  cmd = Builtins.sformat("rpm -V %1 |grep ' %2$'", package, file)
  out = Convert.to_map(SCR.Execute(path(".target.bash_output"), cmd))
  changes = Ops.get_string(out, "stdout", "")
  Builtins.y2milestone("File possibly changed: %1", changes)
  lines = Builtins.splitstring(changes, "\n")
  changed = false
  Builtins.foreach(lines) do |line|
    changed = true if Builtins.regexpmatch(line, "^S")
    changed = true if Builtins.regexpmatch(line, "^..5")
    changed = true if Builtins.regexpmatch(line, "^.......T")
  end
  changed
end

#mainObject



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# File 'library/system/src/modules/FileChanges.rb', line 51

def main
  Yast.import "UI"

  textdomain "base"

  Yast.import "Mode"
  Yast.import "Popup"
  Yast.import "Directory"
  Yast.import "Label"
  Yast.import "FileUtils"

  @data_file = "/var/lib/YaST2/file_checksums.ycp"

  @file_checksums = {}
end

#ReadSettingsObject

Read the data file containing file checksums



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# File 'library/system/src/modules/FileChanges.rb', line 68

def ReadSettings
  if Ops.less_or_equal(
    Convert.to_integer(SCR.Read(path(".target.size"), @data_file)),
    0
  )
    @file_checksums = {}
    return
  end
  @file_checksums = Convert.convert(
    SCR.Read(path(".target.ycp"), @data_file),
    from: "any",
    to:   "map <string, string>"
  )
  @file_checksums = {} if @file_checksums.nil?

  nil
end

#StoreFileCheckSum(file) ⇒ Object

Store checksum of a file to the store

Parameters:

  • file (String)

    string filename to compute and store



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# File 'library/system/src/modules/FileChanges.rb', line 156

def StoreFileCheckSum(file)
  ReadSettings()
  sum = ComputeFileChecksum(file)
  Ops.set(@file_checksums, file, sum)
  WriteSettings()

  nil
end

#WriteSettingsObject

Write the data file containing checksums



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# File 'library/system/src/modules/FileChanges.rb', line 87

def WriteSettings
  SCR.Write(path(".target.ycp"), @data_file, @file_checksums)

  nil
end