The content of this blog is my personal opinion only. Although I am an employee - currently of Imagination Technologies's MIPS group, in the past of other companies such as Intellectual Ventures, Intel, AMD, Motorola, and Gould - I reveal this only so that the reader may account for any possible bias I may have towards my employer's products. The statements I make here in no way represent my employer's position, nor am I authorized to speak on behalf of my employer. In fact, this posting may not even represent my personal opinion, since occasionally I play devil's advocate.

See http://docs.google.com/View?id=dcxddbtr_23cg5thdfj for photo credits.

Tuesday, September 08, 2015

Version Control of Crash Recovery Cruft

I have developed a system whereby I archive the "cruft" created by a crash into a tar file


so that I can recover autosave files if necessary, but so that they do not clutter my directory.

I just added a quickie to count the number of crashes saved, or at least an approximation thereof.

This is one of those "duh, why didn't I do this years ago" sorts of things.

EVERYTHING needs version control.

Even crash recovery files.

It sure is nice to have multiple versions of the same crash recovery file(name) , rather than having to rename them autosave.1 autosave.2, ...  (Most important thing is to be able to name things. Second most important thing is to not have to name things.)

    CRUFT_FILES= $(FM_CRUFT_FILES) $(PPT_CRUFT_FILES)    FM_CRUFT_FILES= *.auto.fm *.backup.fm *.auto.book *.backup.book *.recover.fm *.recover.book    PPT_CRUFT_FILES= *Autosaved*.pptx    .PHONY: save-cruft    save-cruft: archive-all-autosave-files    .PHONY: archive-all-autosave-files    archive-all-autosave-files:    -echo $(PPT_CRUFT_FILES) | gtar -uf TAR.archived framemaker-cruft.tar    -rm $(PPT_CRUFT_FILES)    -echo $(FM_CRUFT_FILES) | gtar -uf TAR.archived-framemaker-cruft.tar    -rm $(FM_CRUFT_FILES)    make unlock-all-framemaker-files
    .PHONY: ls-cruft    ls-cruft:    ls $(CRUFT_FILES)
    .PHONY: count-crashes    count-crashes:    .PHONY: count-saved-crash-cruft    count-saved-crash-cruft:    gtar tvf TA*tar | perl -p -e 's/^([^ \t]+[ \t]+){3}([^ \t]+ [^ \t]+).*/\2/' | sort -u | tee >(echo "Unique timestamps (crash points in archive):" `gwc --lines`)