pascalscript - Parse key-value text file in Inno Setup for checking version number -


i'm creating inno setup installer/updater application. need find way check if new version available , if available should installed automatically on installed version.

the special case version number in file other data. file inno setup need read looks like:

#eclipse product file #fri aug 18 08:20:35 cest 2017 version=0.21.0 name=appname id=appid

i found way update application using script read text file version number in it. inno setup: check new updates

but in case contains more data installer not need. can me build script can parse version number out of file?

the code have looks like:

function getinstalldir(const filename, section: string): string; var   s: string;   dirline: integer;   linecount: integer;   sectionline: integer;       lines: tarrayofstring; begin   result := ''; log('start');   if loadstringsfromfile(filename, lines)   begin log('loaded file');     linecount := getarraylength(lines);     sectionline := 0 linecount - 1  log('file line ' + lines[sectionline]);       if (pos('version=', lines[sectionline]) <> 0)                 begin                   log('version found');                   s := removequotes(trim(lines[sectionline]));                   stringchangeex(s, '\\', '\', true);                   result := s;                   exit;                 end;     end; end;

but when running script check checking if version string on line not work.

your code correct. missing begin , end around code, want repeat in for loop. log line repeats; , if executed out-of-the-range linecount index.

it becomes obvious, if format code better:

function getinstalldir(const filename, section: string): string; var   s: string;   dirline: integer;   linecount: integer;   sectionline: integer;       lines: tarrayofstring; begin   result := '';   log('start');   if loadstringsfromfile(filename, lines)   begin     log('loaded file');     linecount := getarraylength(lines);     sectionline := 0 linecount - 1     begin { <--- missing }       log('file line ' + lines[sectionline] );        if (pos('version=', lines[sectionline]) <> 0)       begin         log('version found');         s := removequotes(trim(lines[sectionline]));         stringchangeex(s, '\\', '\', true);         result := s;         exit;       end;     end; { <--- missing }   end; end;

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