46 lines
1.4 KiB
Markdown
46 lines
1.4 KiB
Markdown
-----
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isHidden: false
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menupriority: 1
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kind: article
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created_at: 2010-09-02T15:54:10+02:00
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title: Use git to calculate trusted mtimes
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author_name: Yann Esposito
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author_uri: yannesposito.com
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tags:
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- nanoc
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- web
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- git
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-----
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You can remark at the bottom of each page I provide a last modification date.
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This label was first calculated using the `mtime` of the file on the file system.
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But many times I modify this date just to force some recompilation.
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Therefore the date wasn't a date of _real_ modification.
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I use [git](http://git-scm.org) to version my website.
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And fortunately I can know the last date of _real_ change of a file.
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This is how I do this with [nanoc](http://nanoc.stoneship.org):
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<code class="ruby" file="gitmtime.rb">
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def gitmtime
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filepath=@item.path.sub('/Scratch/','content/html/').sub(/\/$/,'')
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ext=%{.#{@item[:extension]}}
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filepath<<=ext
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if not FileTest.exists?(filepath)
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filepath.sub!(ext,%{/index#{ext}})
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end
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str=`git log -1 --format='%ci' -- #{filepath}`
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if str.nil? or str.empty?
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return Time.now
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else
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return DateTime.parse( str )
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end
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end
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</code>
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Of course I know it is really slow and absolutely not optimized.
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But it works as expected.
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Now the date you see at the bottom is exactly the date I modified the _content_ of the page.
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Thanks to Eric Sunshine to provide me some hints at cleaning my code.
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