2010-09-02 14:42:39 +00:00
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2010-09-27 18:49:15 +00:00
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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.
Therefore the date wasn’ t a date of < em > real< / em > modification.< / p >
< 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 >
< div class = "code" > < div class = "file" > < a href = "/Scratch/en/blog/2010-09-02-Use-git-to-calculate-trusted-mtimes/code/gitmtime.rb" > ➥ gitmtime.rb < / a > < / div > < div class = "withfile" >
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< span class = "Keyword" > def< / span > < span class = "Entity" > gitmtime< / span >
filepath< span class = "Keyword" > =< / span > < span class = "Variable" > < span class = "Variable" > @< / span > item< / span > .< span class = "Entity" > path< / span > .< span class = "Entity" > sub< / span > (< span class = "String" > < span class = "String" > '< / span > /Scratch/< span class = "String" > '< / span > < / span > ,< span class = "String" > < span class = "String" > '< / span > content/html/< span class = "String" > '< / span > < / span > ).< span class = "Entity" > sub< / span > (< span class = "StringRegexp" > < span class = "StringRegexp" > /< / span > < / span > < span class = "StringRegexp" > < span class = "StringRegexpSpecial" > \/< / span > $< / span > < span class = "StringRegexp" > < span class = "StringRegexp" > /< / span > < / span > ,< span class = "String" > < span class = "String" > '< / span > < span class = "String" > '< / span > < / span > )
ext< span class = "Keyword" > =< / span > < span class = "String" > < span class = "String" > %{< / span > .< span class = "StringEmbeddedSource" > < span class = "StringEmbeddedSource" > #{< / span > < span class = "StringVariable" > < span class = "StringVariable" > @< / span > item< / span > < span class = "StringEmbeddedSource" > [< / span > < span class = "StringConstant" > < span class = "StringConstant" > :< / span > extension< / span > < span class = "StringEmbeddedSource" > ]< / span > < span class = "StringEmbeddedSource" > }< / span > < / span > < span class = "String" > }< / span > < / span >
filepath< span class = "Keyword" > < < =< / span > ext
< span class = "Keyword" > if< / span > < span class = "Keyword" > not< / span > < span class = "Support" > FileTest< / span > .< span class = "Entity" > exists?< / span > (filepath)
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< span class = "Keyword" > end< / span >
str< span class = "Keyword" > =< / span > < span class = "String" > < span class = "String" > `< / span > git log -1 --format='%ci' -- < span class = "StringEmbeddedSource" > < span class = "StringEmbeddedSource" > #{< / span > filepath< span class = "StringEmbeddedSource" > }< / span > < / span > < span class = "String" > `< / span > < / span >
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< span class = "Keyword" > return< / span > < span class = "Support" > Time< / span > .< span class = "Entity" > now< / span >
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< span class = "Keyword" > return< / span > < span class = "Support" > DateTime< / span > .< span class = "Entity" > parse< / span > ( str )
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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 >
2010-09-03 08:42:33 +00:00
< p > Thanks to Eric Sunshine to provide me some hints at cleaning my code.< / p >
2010-09-02 14:42:39 +00:00
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< a rel = "license" href = "http://creativecommons.org/licenses/by-sa/3.0/" > Copyright ©, Yann Esposito< / a >
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Created: 09/02/2010
2010-09-04 08:20:28 +00:00
Modified: 09/03/2010
2010-09-02 14:42:39 +00:00
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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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