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< link rel = "alternate" lang = "fr" xml:lang = "fr" title = "Utilisation de git pour calculer les mtimes" type = "text/html" hreflang = "fr" href = "/Scratch/fr/blog/2010-09-02-Use-git-to-calculate-trusted-mtimes/" / >
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< title > Use git to calculate trusted mtimes< / title >
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< a href = "/Scratch/fr/blog/2010-09-02-Use-git-to-calculate-trusted-mtimes/" onclick = "setLanguage('fr')" > en Français< / a >
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Use git to calculate trusted mtimes
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< p > You can remark at the bottom of each page I provide a last modification date.
This label was first calculated using the < code > mtime< / code > of the file on the file system.
But many times I modify this date just to force some recompilation.
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Therefore the date wasn’ t a date of < em > real< / em > modification.< / p >
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< p > I use < a href = "http://git-scm.org" > git< / a > to version my website.
And fortunately I can know the last date of < em > real< / em > change of a file.
This is how I do this with < a href = "http://nanoc.stoneship.org" > nanoc< / a > :< / p >
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< div class = "codefile" > < a href = "/Scratch/en/blog/2010-09-02-Use-git-to-calculate-trusted-mtimes/code/gitmtime.rb" > ➥ gitmtime.rb< / a > < / div >
< pre > < code class = "ruby" > def gitmtime
filepath=@item.path.sub('/Scratch/','content/html/').sub(/\/$/,'')
ext=%{.#{@item[:extension]}}
filepath< < =ext
if not FileTest.exists?(filepath)
filepath.sub!(ext,%{#{@item.raw_filename}#{ext}})
end
str=`git log -1 --format='%ci' -- #{filepath}`
if str.nil? or str.empty?
return Time.now
else
return DateTime.parse( str )
end
end
< / code > < / pre >
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< p > Of course I know it is really slow and absolutely not optimized.
But it works as expected.
Now the date you see at the bottom is exactly the date I modified the < em > content< / em > of the page.< / p >
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< p > < em > Edit< / em > :
Thanks to Eric Sunshine and Kris to provide me some hints at cleaning my code.< / p >
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Created: 09/02/2010
2011-09-14 08:39:40 +00:00
Modified: 09/14/2011
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Entirely done with
< a href = "http://www.vim.org" > Vim< / a >
and
< a href = "http://nanoc.stoneship.org" > nanoc< / a >
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