Bundle MSVC++ redistributable with the installer

Installer checks for presence of msvcr100.dll library in the System32 folder (or
SysWOW64 in case of 64 bit systems). If not present, it will install it
(version 2010 SP1 x86).

.appveyor.yml

@@ -42,6 +42,7 @@ test_script:
     - 7z a -r pysol_win_dist.7z dist\
     - SET PYTHONPATH=%cd%
     - python3 scripts\create_iss.py
+    - appveyor DownloadFile https://www.microsoft.com/en-us/download/confirmation.aspx?id=8328 -FileName vcredist_x86.exe
     - SET PATH=%PATH%;"C:\\Program Files (x86)\\Inno Setup 5"
     - ISCC /Q setup.iss
 artifacts:

scripts/create_iss.py

@@ -55,4 +55,26 @@ for d in files_list[1:]:
     d = d.replace('dist\\', '')
     print('Source: "%s\\*"; DestDir: "{app}\\%s"' % (d, d), file=out)
 
+print('Source: "..\\vcredist_x86.exe"; DestDir: {tmp}; \
+Flags: deleteafterinstall', file=out)
+print('[Run]\n\
+Filename: {tmp}\\vcredist_x86.exe; \
+Parameters: "/passive /promptrestart /showfinalerror"; \
+StatusMsg: "Installing MS Visual C++ 2010 SP1 Redistributable Package (x86)"; \
+Check: not isVCInstalled', file=out)
+print('''
+[Code]
+function isVCInstalled: Boolean;
+var
+  find: TFindRec;
+begin
+  if FindFirst(ExpandConstant('{sys}\\msvcr100.dll'), find) then begin
+    Result := True;
+    FindClose(find);
+  end else begin
+    Result := False;
+  end;
+ end;
+''', file=out)
+
 out.close()