在Inno Setup中使用Define和Constant

Question

I've a question about the #define in Inno Setup. I've make a setup who's working well and i'm thinking of the future of app if i have some modification to do. For example, if i change the version (Major, Minor, Build, Patch,...) i doesn't want to change all the line (like Registry) at each time.

So i try to make something like that :

#define MyAppMajor "5"
#define MyAppMinor "5"
#define MyAppBuild "1"
#define MyAppPatch "1"

...

[Files]    
Source: "D:\ProgramFiles\..."; DestDir: "{app}\Program\{MyAppMajor}.{MyAppMinor}\"; Flags: ignoreversion;

[Registry]
Root: "HKLM32"; Subkey: "Software\program\"; ... ; ValueData: "{MyAppMajor}.{MyAppMinor}.{MyAppBuild}.{MyAppPatch}";

But that doesn't compile and it says :

"Unknown constant "MyAppMajor".Use two consecutive "{" characters if you are trying to embed a single "{" and not a constant" .

Is there a way to do something like that for versionning or another constant ?

Answer 1

You missed to use the # char (or #emit , which is the longer version of the same), that is used to inline a defined variable into the script, eg:

#define MyAppMajor "5"
#define MyAppMinor "5"
#define MyAppBuild "1"
#define MyAppPatch "1"

[Files]
...; DestDir: "{app}\Program\{#MyAppMajor}.{#MyAppMinor}\"; Flags: ignoreversion;

[Registry]
...; ValueData: "{#MyAppMajor}.{#MyAppMinor}.{#MyAppBuild}.{#MyAppPatch}";

When missing this, the compiler expected (built-in) constants called MyAppMajor , MyAppMinor etc., whose doesn't exist; hence the error.

But, what you're trying to replicate is probably built-in in Inno Setup as the AppVersion directive. It might be useful eg in conjunction of reading the version of the application binary from its included file version information:

#define AppVersion GetFileVersion('C:\MyApp.exe')

[Setup]
...
AppVersion={#AppVersion}

Answer 2

Although I haven't found something in Inno's documentation explicitly stating it, there is an example where the + operator is used to concatenate strings. I think you can get by with something like this:

Source: "D:\ProgramFiles\..."; DestDir: "{app}\Program\" + MyAppMajor + "." + MyAppMinor + "\"; Flags: ignoreversion;

If that doesn't work, there is a StringChange preprocessor macro that should work but will be uglier, especially in strings with multiple substitutions:

#define MyAppMajor "5"
#define MyAppMinor "5"

#define InstallDirectory StringChange(StringChange("{app}\Program\%major%.%minor%", "%major", MyAppMajor), "%minor%", MyAppMinor)

Source: "D:\ProgramFiles\..."; DestDir: InstallDirectory; Flags: ignoreversion;