Class: Yast::LogViewCoreClass
- Inherits:
-
Module
- Object
- Module
- Yast::LogViewCoreClass
- Defined in:
- ../../src/modules/LogViewCore.rb
Instance Method Summary (collapse)
-
- (Object) DeleteOldLines
Remove unneeded items from a list of lines If max_lines is 0, then don't remove anything.
- - (Object) GetLines
- - (Object) GetNewLines
- - (Object) main
-
- (Object) Start(widget, d)
Starts the log reading command via process agent.
- - (Object) Stop
- - (Object) Update(widget)
Instance Method Details
- (Object) DeleteOldLines
Remove unneeded items from a list of lines If max_lines is 0, then don't remove anything
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# File '../../src/modules/LogViewCore.rb', line 85 def DeleteOldLines max_lines = Ops.get_integer(@data, "max_lines", @max_lines_default) return if max_lines == 0 if Ops.greater_than( Ops.subtract(Ops.subtract(Builtins.size(@lines), max_lines), 1), 0 ) @lines = Builtins.sublist( @lines, Ops.subtract(Ops.subtract(Builtins.size(@lines), max_lines), 1) ) end nil end |
- (Object) GetLines
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# File '../../src/modules/LogViewCore.rb', line 224 def GetLines deep_copy(@lines) end |
- (Object) GetNewLines
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# File '../../src/modules/LogViewCore.rb', line 62 def GetNewLines return [] if !@is_running if !Convert.to_boolean(SCR.Read(path(".process.running"), @id)) @is_running = false Report.Error(_("Error occurred while reading the log.")) return [] end new_lines = [] loop do line = Convert.to_string(SCR.Read(path(".process.read_line"), @id)) break if line.nil? new_lines = Builtins.add(new_lines, line) end deep_copy(new_lines) end |
- (Object) main
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# File '../../src/modules/LogViewCore.rb', line 35 def main Yast.import "UI" textdomain "base" Yast.import "Report" # default value of maximum displayed lines @max_lines_default = 100 # lines of the log @lines = [] # data describing log: # file: filename to read from # grep: grep file with expression # command: command to run (use instead of file and grep) # max_lines: max lines to keep (0 -> infinite) @data = {} # id of background process @id = nil # flag indicating if background process is (or should be) running @is_running = false end |
- (Object) Start(widget, d)
Starts the log reading command via process agent.
The LogView widget must exist when calling this function. The `MaxLines parameter of the widget will be set.
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# File '../../src/modules/LogViewCore.rb', line 106 def Start(, d) = deep_copy() d = deep_copy(d) if !@id.nil? SCR.Execute(path(".process.release"), @id) @id = nil end @data = deep_copy(d) file = Ops.get_string(@data, "file", "") grep = Ops.get_string(@data, "grep", "") command = Ops.get_string(@data, "command", "") max_lines = Ops.get_integer(@data, "max_lines", @max_lines_default) if command == "" if grep == "" command = Builtins.sformat("tail -n %1 -f '%2'", max_lines, file) else command = Builtins.sformat( "tail -n +0 -f '%1' | grep --line-buffered '%2'", file, grep ) if max_lines != 0 lc_command = Builtins.sformat( "cat '%1' | grep '%2' | wc -l", file, grep ) bash_output = Convert.to_map( SCR.Execute(path(".target.bash_output"), lc_command) ) if Ops.get_integer(bash_output, "exit", 1) == 0 lc = Builtins.filterchars( Ops.get_string(bash_output, "stdout", ""), "1234567890" ) lines_count = Builtins.tointeger(lc) # don't know why without doubling it discards more lines, # out of YaST2 it works lines_count = Ops.subtract( lines_count, Ops.multiply(2, max_lines) ) lines_count = 0 if Ops.less_than(lines_count, 0) if Ops.greater_than(lines_count, 0) command = Ops.add( command, Builtins.sformat(" | tail -n +%1", lines_count) ) end end end end end Builtins.y2milestone("Calling process agent with command %1", command) @id = Convert.to_integer( SCR.Execute(path(".process.start_shell"), command, "tty" => true) ) @is_running = true Builtins.sleep(100) @lines = GetNewLines() DeleteOldLines() UI.ChangeWidget(, :MaxLines, max_lines) UI.ChangeWidget( , :Value, Builtins.mergestring(Builtins.maplist(@lines) do |line| Ops.add(line, "\n") end, "") ) nil end |
- (Object) Stop
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# File '../../src/modules/LogViewCore.rb', line 215 def Stop if !@id.nil? SCR.Execute(path(".process.release"), @id) @id = nil end nil end |
- (Object) Update(widget)
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# File '../../src/modules/LogViewCore.rb', line 190 def Update() = deep_copy() if !@id.nil? new_lines = GetNewLines() if Ops.greater_than(Builtins.size(new_lines), 0) @lines = Convert.convert( Builtins.merge(@lines, new_lines), from: "list", to: "list <string>" ) DeleteOldLines() UI.ChangeWidget( , :LastLine, Builtins.mergestring(Builtins.maplist(new_lines) do |line| Ops.add(line, "\n") end, "") ) end end nil end |