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140 lines
4.0 KiB
ObjectPascal
140 lines
4.0 KiB
ObjectPascal
{ Classes for interpreting the output of svn commands
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Copyright (C) 2007 Vincent Snijders vincents@freepascal.org
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This library is free software; you can redistribute it and/or modify it
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under the terms of the GNU Library General Public License as published by
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the Free Software Foundation; either version 2 of the License, or (at your
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option) any later version with the following modification:
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent modules,and
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to copy and distribute the resulting executable under terms of your choice,
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provided that you also meet, for each linked independent module, the terms
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and conditions of the license of that module. An independent module is a
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module which is not derived from or based on this library. If you modify
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this library, you may extend this exception to your version of the library,
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but you are not obligated to do so. If you do not wish to do so, delete this
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exception statement from your version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
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for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; if not, write to the Free Software Foundation,
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Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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}
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unit SvnCommand;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils,
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process,
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FileUtil;
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function ExecuteSvnCommand(const Command: string; Output: TStream): integer;
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function ExecuteSvnCommand(const Command: string): integer;
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procedure DumpStream(const AStream: TStream);
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var
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SvnExecutable: string;
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implementation
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procedure InitializeSvnExecutable;
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begin
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if FileExists(SvnExecutable) then exit;
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{$IFDEF windows}
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SvnExecutable := GetEnvironmentVariable('ProgramFiles') + '\Subversion\bin\svn.exe';
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{$ENDIF}
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if not FileExists(SvnExecutable) then
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SvnExecutable := FindDefaultExecutablePath('svn');
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if not FileExists(SvnExecutable) then
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raise Exception.Create('No svn executable found');
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end;
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function ExecuteSvnCommand(const Command: string; Output: TStream): integer;
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var
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SvnProcess: TProcess;
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function ReadOutput: boolean;
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// returns true if output was actually read
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const
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BufSize = 4096;
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var
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Buffer: array[0..BufSize-1] of byte;
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ReadBytes: integer;
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begin
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Result := false;
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while SvnProcess.Output.NumBytesAvailable>0 do begin
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ReadBytes := SvnProcess.Output.Read(Buffer, BufSize);
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Output.Write(Buffer, ReadBytes);
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Result := true;
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end;
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end;
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function GetOutput: string;
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begin
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SetLength(Result, Output.Size);
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Output.Seek(0,soBeginning);
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Output.Read(Result[1],Length(Result));
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end;
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begin
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if SvnExecutable='' then InitializeSvnExecutable;
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SvnProcess := TProcess.Create(nil);
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try
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SvnProcess.CommandLine := SvnExecutable + ' ' + Command;
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SvnProcess.Options := [poUsePipes];
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SvnProcess.ShowWindow := swoHIDE;
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SvnProcess.Execute;
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while SvnProcess.Running do begin
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if not ReadOutput then
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Sleep(100);
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end;
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ReadOutput;
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Result := SvnProcess.ExitStatus;
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if Result<>0 then begin
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Raise Exception.CreateFmt(
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'svn %s failed: Result %d' + LineEnding + '%s',
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[Command, Result, GetOutput]);
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end;
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finally
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SvnProcess.Free;
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end;
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end;
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function ExecuteSvnCommand(const Command: string): integer;
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var
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Output: TMemoryStream;
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begin
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Output := TMemoryStream.Create;
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try
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Result := ExecuteSvnCommand(Command, Output);
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finally
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Output.Free;
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end;
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end;
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procedure DumpStream(const AStream: TStream);
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var
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lines: TStrings;
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begin
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lines := TStringList.Create;
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AStream.Position := 0;
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lines.LoadFromStream(AStream);
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writeln(lines.Text);
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lines.Free;
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end;
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end.
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