Class: Yast::FileChangesClass

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

Instance Method Summary (collapse)

Instance Method Details

- (Boolean) CheckFiles(files)

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 '../../src/modules/FileChanges.rb', line 169

def CheckFiles(files)
  files = deep_copy(files)
  files = Builtins.filter(files) { |f| FileChanged(f) }
  if Ops.greater_than(Builtins.size(files), 0)
    # Continue/Cancel question, %1 is a file name
    msg = _(
      "File %1 has been changed manually.\nYaST might lose some of the changes.\n"
    )
    if Ops.greater_than(Builtins.size(files), 1)
      # Continue/Cancel question, %1 is a coma separated list of file names
      msg = _(
        "Files %1 have been changed manually.\nYaST might lose some of the changes"
      )
    end
    msg = Builtins.sformat(msg, Builtins.mergestring(files, ", "))
    popup_file = "/filechecks_non_verbose"
    if {} ==
        SCR.Read(
          path(".target.stat"),
          Ops.add(Directory.vardir, popup_file)
        )
      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
      if ret == :ok
        return true
      else
        return false
      end
    else
      #			return Popup::ContinueCancel (msg);
      return true
    end
  end
  true
end

- (String) ComputeFileChecksum(file)

Compute the checksum of a file

Parameters:

  • file (String)

    string the file to compute checksum of

Returns:

  • (String)

    the checksum



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# File '../../src/modules/FileChanges.rb', line 95

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

- (Boolean) FileChanged(file)

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 '../../src/modules/FileChanges.rb', line 136

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

- (Boolean) FileChangedFromPackage(file)

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 '../../src/modules/FileChanges.rb', line 109

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

- (Object) main



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# File '../../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"

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

  @file_checksums = {}
end

- (Object) ReadSettings

Read the data file containing file checksums



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# File '../../src/modules/FileChanges.rb', line 67

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

- (Object) StoreFileCheckSum(file)

Store checksum of a file to the store

Parameters:

  • file (String)

    string filename to compute and store



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# File '../../src/modules/FileChanges.rb', line 155

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

  nil
end

- (Object) WriteSettings

Write the data file containing checksums



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# File '../../src/modules/FileChanges.rb', line 86

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

  nil
end