When I used previous versions of Eclipse (e.g. Ganymede/Europa) if I had edited a file and then attempted a build Eclipse would prompt me to save first.
Since I updated to Galileo (Build id: 20090920-1017 & just checked for updates) when I build I'm not prompted to save first. Perhaps the dialog had a checkbox for "don't tell me again" which I mistakenly checked on???
I figure it is just a preference setting some where but I can't seem to find it, search in Preferences for 'save' and for 'build' but did not find it. I tried "Save automatically before build" but that actually did not work for me, and isn't really what I was looking for anyways.
Any ideas?
thanks.
Edit: I'm actually using an Ant script to 'build' (right click on script and Run As...Ant Build). So perhaps my original wording was a bit off base since I did not state how I was building.
It's under Window -> Preferences -> General -> Workspace -> Save automatically before build. This works for me if I'm doing an Eclipse build (Project -> Build All). Is that how you're building?
As mention in this thread, the only other options (other than the "Save automatically before build") which actually prompt for the user for file saving are:
> Run/Debug > Launching > Save required dirty editors before launching
> Run/Debug > Launching > [x] Build (if required) before launching
Answer of VonC looks great, but does not work as it seems (Eclipse 3.5.1.R35x_v20090910 on WinXP-Pro-32). However Eclipse and I seem to think differently about what is a "required dirty editor" :-( --
Would be nice if it would be possible to define a scope of resources to check for dirtyness for every single launch configuration -- with "containing project & refernced projects" as the default setting.
But it looks like 3.5.2 fixes this problem.
来源：https://stackoverflow.com/questions/1955489/eclipse-galileo-ide-force-save-of-changed-files-before-build