我继承了一个安装程序脚本,我很恼火它声称需要的空间是实际需要的两倍。
我发现这是由于每个部分如何使用SetOverwrite
(因为它们被重新用于修复安装?)。我知道由于File
的工作原理(见下文),有必要在每个If / Else块中保留重复的SetOverwrite
命令,但我已经确认它会导致自动加倍截面尺寸计算。
${MementoSection} $(APP_Section_SecHelp) SecHelp
SetDetailsPrint textonly
DetailPrint $(APP_DetailPrint_SecHelp)
SetDetailsPrint listonly
SetOutPath $INSTDIR
SectionIn 1 2
${If} $SetOverwriteOn == TRUE
SetOverwrite ifnewer
File /r "${APP_SOURCE_DIR}\Help"
${Else}
SetOverwrite off
File /r "${APP_SOURCE_DIR}\Help"
${EndIf}
SectionGetFlags ${SecHelp} $SecHelp_GetFlag
${MementoSectionEnd}
这是一个糟糕的设计模式,我应该改变吗?我是否需要添加黑客来呼叫SectionGetSize
,除以2并呼叫SectionSetSize
?
答案 0 :(得分:2)
就我个人而言,我只会使用SetOverwrite ifnewer
,但如果你绝对想按照自己的方式去做,那么使用SectionSetSize
是一种选择。
您可以做的另一件事是将修复File /r
指令放在您从该部分调用的单独函数中。函数的缺点是进度条在提取过程中移动不多。
第三种方法是将一些修复任务放在一个默认未选中的单独部分中,并在处于修复模式时启用它。
编辑:以下是使用SectionSetSize:的示例
!include LogicLib.nsh
InstallDir $Temp
Page Components InitComponentsPage
Page Directory
Page InstFiles
!macro ModifySectionHack SID TEMPVAR
SectionGetSize ${SID} ${TEMPVAR}
IntOp ${TEMPVAR} ${TEMPVAR} / 2
SectionSetSize ${SID} ${TEMPVAR}
!macroend
Function InitComponentsPage
StrCpy $0 0
loop:
ClearErrors
SectionGetFlags $0 $1 ; The error flag is set if we try to access a section that does not exist
IfErrors done
!insertmacro ModifySectionHack $0 $1
IntOp $0 $0 + 1
Goto loop
done:
FunctionEnd
Section "Foo"
InitPluginsDir ; Need a place to extract to for this example
SetOutPath $PluginsDir
${If} 1 <> 2 ; Don't really care about the result
SetOverwrite ifnewer
File "${NSISDIR}\bin\makensis.exe" ; ~400kb
${Else}
SetOverwrite off
File "${NSISDIR}\bin\makensis.exe"
${EndIf}
SectionEnd
Section "Bar"
InitPluginsDir ; Need a place to extract to for this example
SetOutPath $PluginsDir
${If} 1 <> 2 ; Don't really care about the result
SetOverwrite ifnewer
File "${NSISDIR}\nsis.exe" ; ~700kb
${Else}
SetOverwrite off
File "${NSISDIR}\nsis.exe"
${EndIf}
SectionEnd
这会遍历所有部分并调整所有部分,但我不确定这是不是一个好主意。如果这是我的脚本,那么我会在每个具有SetOverwrite问题的部分上手动调用ModifySectionHack:
!include LogicLib.nsh
InstallDir $Temp
Page Components
Page Directory
Page InstFiles
!macro ModifySectionHack SID TEMPVAR
SectionGetSize ${SID} ${TEMPVAR}
IntOp ${TEMPVAR} ${TEMPVAR} / 2
SectionSetSize ${SID} ${TEMPVAR}
!macroend
Section "Foo" SID_FOO
InitPluginsDir ; Need a place to extract to for this example
SetOutPath $PluginsDir
${If} 1 <> 2 ; Don't really care about the result
SetOverwrite ifnewer
File "${NSISDIR}\bin\makensis.exe" ; ~400kb
${Else}
SetOverwrite off
File "${NSISDIR}\bin\makensis.exe"
${EndIf}
SectionEnd
Section "Bar"
${If} 1 = 2
File /r "${NSISDIR}\stubs"
${EndIf}
SectionEnd
Section "Baz" SID_BAZ
InitPluginsDir ; Need a place to extract to for this example
SetOutPath $PluginsDir
${If} 1 <> 2 ; Don't really care about the result
SetOverwrite ifnewer
File "${NSISDIR}\nsis.exe" ; ~700kb
${Else}
SetOverwrite off
File "${NSISDIR}\nsis.exe"
${EndIf}
SectionEnd
Function .onInit
; Adjust the section size for the sections that use SetOverwrite:
!insertmacro ModifySectionHack ${SID_FOO} $1
!insertmacro ModifySectionHack ${SID_BAZ} $1
FunctionEnd