bat文件如何仅当资源文件修改时调用resgen及正确获取数组值

批处理没有原生数组结构，你定义的obj[n].xxx属于自定义伪数组结构，要在for循环中动态取下标对应的元素，核心要解决两个问题：

1. 批处理默认对括号包裹的代码块做预变量展开，代码块内动态赋值、动态生成变量名的内容，用%变量名%语法无法获取到实时值
2. 动态拼接的变量名需要触发二次解析才能拿到对应的值

推荐方案：使用延迟变量扩展 #

这是最稳定的写法，首先在脚本开头开启延迟扩展，用!变量名!语法取实时值，同时修复了你原脚本中标签放在循环内破坏遍历逻辑的问题，完整修改后代码如下：

@echo on
setlocal enabledelayedexpansion

echo ------------------------------
echo -- Starting a run of resgen --
echo ------------------------------

Set resourcesPath=%~1Resources\
Set configuration=%~2
Set platform=%~3

set landingPath=%~1bin\%configuration%\Resources\

echo %landingPath%

IF exist %landingPath% ( echo %landingPath% exists ) ELSE ( mkdir %landingPath% && echo %landingPath% created)

set obj[0].Resource="%landingPath%Strings.en-GB.resources"
set obj[0].Text="%resourcesPath%Strings.en-GB.txt"
set obj[1].Resource="%landingPath%Strings.ru-RU.resources"
set obj[1].Text="%resourcesPath%Strings.ru-RU.txt"
set obj[2].Resource="%landingPath%Strings.es-ES.resources"
set obj[2].Text="%resourcesPath%Strings.es-ES.txt"

FOR /L %%i IN (0 1 2) DO  (
    rem 动态拼接变量名，用延迟扩展取值
    set "textPath=!obj[%%i].Text!"
    set "resPath=!obj[%%i].Resource!"

    for %%x in ("!textPath!") do set "date_of_filenameTxt=%%~tx"
    for %%x in ("!resPath!") do set "date_of_filenameRes=%%~tx"

    ECHO !date_of_filenameTxt:~0, 16!
    ECHO !date_of_filenameRes:~0, 16!

    rem 直接在循环内做判断，避免用内部标签打断循环
    IF "!date_of_filenameTxt:~0, 16!" == "!date_of_filenameRes:~0, 16!" (
        ECHO No Copy for the : !textPath!
    ) ELSE (
        "%resourcesPath%resgen.exe" !textPath! !resPath!
    )
)
endlocal

替代方案：用call触发二次解析 #

如果你不想开启延迟扩展，也可以用call触发二次解析实现取值，写法如下：

@echo on

echo ------------------------------
echo -- Starting a run of resgen --
echo ------------------------------

Set resourcesPath=%~1Resources\
Set configuration=%~2
Set platform=%~3

set landingPath=%~1bin\%configuration%\Resources\

echo %landingPath%

IF exist %landingPath% ( echo %landingPath% exists ) ELSE ( mkdir %landingPath% && echo %landingPath% created)

set obj[0].Resource="%landingPath%Strings.en-GB.resources"
set obj[0].Text="%resourcesPath%Strings.en-GB.txt"
set obj[1].Resource="%landingPath%Strings.ru-RU.resources"
set obj[1].Text="%resourcesPath%Strings.ru-RU.txt"
set obj[2].Resource="%landingPath%Strings.es-ES.resources"
set obj[2].Text="%resourcesPath%Strings.es-ES.txt"

FOR /L %%i IN (0 1 2) DO  (
    rem 用call二次解析获取动态变量值
    call set "textPath=%%obj[%%i].Text%%"
    call set "resPath=%%obj[%%i].Resource%%"

    for %%x in ("%textPath%") do set "date_of_filenameTxt=%%~tx"
    for %%x in ("%resPath%") do set "date_of_filenameRes=%%~tx"

    call ECHO %%date_of_filenameTxt:~0, 16%%
    call ECHO %%date_of_filenameRes:~0, 16%%

    call IF "%%date_of_filenameTxt:~0, 16%%" == "%%date_of_filenameRes:~0, 16%%" (
        call ECHO No Copy for the : %%textPath%%
    ) ELSE (
        "%resourcesPath%resgen.exe" %%textPath%% %%resPath%%
    )
)

注意事项 #

不要把跳转标签:xxx写在for循环的括号内部，会直接打断for循环的执行逻辑，导致遍历异常，直接把判断逻辑写在循环内即可。

内容的提问来源于stack exchange，提问作者Diego