2021-04-18 10:23:24 +00:00
<!DOCTYPE html>
< html lang = "en" >
< head >
< meta charset = "utf-8" >
< title > YBlog - Use git to calculate trusted mtimes< / title >
< meta name = "keywords" content = "nanoc, web, git" / >
< link rel = "shortcut icon" type = "image/x-icon" href = "../../../../Scratch/img/favicon.ico" / >
2021-05-25 20:25:47 +00:00
< link rel = "stylesheet" type = "text/css" href = "/css/y.css" / >
< link rel = "stylesheet" type = "text/css" href = "/css/legacy.css" / >
< link rel = "alternate" type = "application/rss+xml" title = "RSS" href = "/rss.xml" / >
2021-04-18 10:23:24 +00:00
< meta name = "viewport" content = "width=device-width, initial-scale=1.0" >
< link rel = "apple-touch-icon" href = "../../../../Scratch/img/about/FlatAvatar@2x.png" / >
<!-- [if lt IE 9]>
< script src = "http://ie7-js.googlecode.com/svn/version/2.1(beta4)/IE9.js" > < / script >
<![endif]-->
<!-- IndieAuth -->
< link href = "https://twitter.com/yogsototh" rel = "me" >
< link href = "https://github.com/yogsototh" rel = "me" >
< link href = "mailto:yann.esposito@gmail.com" rel = "me" >
< link rel = "pgpkey" href = "../../../../pubkey.txt" >
< / head >
< body lang = "en" class = "article" >
< div id = "content" >
< div id = "header" >
< div id = "choix" >
< span id = "choixlang" >
< a href = "../../../../Scratch/fr/blog/2010-09-02-Use-git-to-calculate-trusted-mtimes/" > French< / a >
< / span >
< span class = "tomenu" > < a href = "#navigation" > ↓ Menu ↓< / a > < / span >
< span class = "flush" > < / span >
< / div >
< / div >
< div id = "titre" >
< h1 > Use git to calculate trusted mtimes< / h1 >
< / div >
< div class = "flush" > < / div >
< div id = "afterheader" class = "article" >
< div class = "corps" >
< 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 = "sourceCode" id = "cb1" > < pre class = "sourceCode ruby" > < code class = "sourceCode ruby" > < a class = "sourceLine" id = "cb1-1" title = "1" > < span class = "kw" > def< / span > gitmtime< / a >
< a class = "sourceLine" id = "cb1-2" title = "2" > filepath=< span class = "ot" > @item< / span > .path.sub(< span class = "st" > '/Scratch/'< / span > ,< span class = "st" > 'content/html/'< / span > ).sub(< span class = "ot" > /\/$/< / span > ,< span class = "st" > ''< / span > )< / a >
< a class = "sourceLine" id = "cb1-3" title = "3" > ext=< span class = "ot" > %{< / span > < span class = "st" > .< / span > < span class = "ot" > #{@item< / span > [< span class = "st" > :extension< / span > ]< span class = "ot" > }}< / span > < / a >
< a class = "sourceLine" id = "cb1-4" title = "4" > filepath< < =ext< / a >
< a class = "sourceLine" id = "cb1-5" title = "5" > < span class = "kw" > if< / span > < span class = "kw" > not< / span > < span class = "dt" > FileTest< / span > .exists?(filepath)< / a >
< a class = "sourceLine" id = "cb1-6" title = "6" > filepath.sub!(ext,< span class = "ot" > %{#{@item< / span > .raw_filename< span class = "ot" > }#{< / span > ext< span class = "ot" > }}< / span > )< / a >
< a class = "sourceLine" id = "cb1-7" title = "7" > < span class = "kw" > end< / span > < / a >
< a class = "sourceLine" id = "cb1-8" title = "8" > str=< span class = "st" > `git log -1 --format='%ci' -- < / span > < span class = "ot" > #{< / span > filepath< span class = "ot" > }< / span > < span class = "st" > `< / span > < / a >
< a class = "sourceLine" id = "cb1-9" title = "9" > < span class = "kw" > if< / span > str.nil? < span class = "kw" > or< / span > str.empty?< / a >
< a class = "sourceLine" id = "cb1-10" title = "10" > < span class = "kw" > return< / span > < span class = "dt" > Time< / span > .now< / a >
< a class = "sourceLine" id = "cb1-11" title = "11" > < span class = "kw" > else< / span > < / a >
< a class = "sourceLine" id = "cb1-12" title = "12" > < span class = "kw" > return< / span > < span class = "dt" > DateTime< / span > .parse( str )< / a >
< a class = "sourceLine" id = "cb1-13" title = "13" > < span class = "kw" > end< / span > < / a >
< a class = "sourceLine" id = "cb1-14" title = "14" > < span class = "kw" > end< / span > < / a > < / code > < / pre > < / div >
< 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 >
< p > < em > Edit< / em > : Thanks to Eric Sunshine and Kris to provide me some hints at cleaning my code.< / p >
< / div >
< div id = "afterarticle" >
< div id = "social" >
2021-05-25 20:25:47 +00:00
< a href = "/rss.xml" target = "_blank" rel = "noopener noreferrer nofollow" class = "social" > RSS< / a >
2021-04-18 10:23:24 +00:00
·
< a href = "https://twitter.com/home?status=http%3A%2F%2Fyannesposito.com/Scratch/en/blog/2010-09-02-Use-git-to-calculate-trusted-mtimes/%20via%20@yogsototh" target = "_blank" rel = "noopener noreferrer nofollow" class = "social" > Tweet< / a >
·
< a href = "http://www.facebook.com/sharer/sharer.php?u=http%3A%2F%2Fyannesposito.com/Scratch/en/blog/2010-09-02-Use-git-to-calculate-trusted-mtimes/" target = "_blank" rel = "noopener noreferrer nofollow" class = "social" > FB< / a >
< br / >
< a class = "message" href = "../../../../Scratch/en/blog/Social-link-the-right-way/" > These social sharing links preserve your privacy< / a >
< / div >
< div id = "navigation" >
< a href = "../../../../" > Home< / a >
< span class = "sep" > ¦< / span >
< a href = "../../../../Scratch/en/blog" > Blog< / a >
< span class = "sep" > ¦< / span >
< a href = "../../../../Scratch/en/softwares" > Softwares< / a >
< span class = "sep" > ¦< / span >
< a href = "../../../../Scratch/en/about" > About< / a >
< / div >
< div id = "totop" > < a href = "#header" > ↑ Top ↑< / a > < / div >
< div id = "bottom" >
< div >
Published on 2010-09-02
< / div >
< div >
< a href = "https://twitter.com/yogsototh" > Follow @yogsototh< / a >
< / div >
< div >
< a rel = "license" href = "http://creativecommons.org/licenses/by/3.0/deed.en_US" > Yann Esposito©< / a >
< / div >
< div >
Done with
< a href = "http://www.vim.org" target = "_blank" rel = "noopener noreferrer nofollow" > < strike > Vim< / strike > < / a >
< a href = "http://spacemacs.org" target = "_blank" rel = "noopener noreferrer nofollow" > spacemacs< / a >
< span class = "pala" > & < / span >
< a href = "http://nanoc.ws" target = "_blank" rel = "noopener noreferrer nofollow" > < strike > nanoc< / strike > < / a >
< a href = "http://jaspervdj.be/hakyll" target = "_blank" rel = "noopener noreferrer nofollow" > Hakyll< / a >
< / div >
< hr / >
< div style = "max-width: 100%" >
< a href = "https://cardanohub.org" >
< img src = "../../../../Scratch/img/ada-logo.png" class = "simple" style = "height: 16px ;
border-radius: 50%;
vertical-align:middle;
display:inline-block;" />
ADA:
< / a >
< code style = "display:inline-block;
word-wrap:break-word;
text-align: left;
vertical-align: top;
max-width: 85%;">
DdzFFzCqrhtAvdkmATx5Fm8NPJViDy85ZBw13p4XcNzVzvQg8e3vWLXq23JQWFxPEXK6Kvhaxxe7oJt4VMYHxpA2vtCFiP8fziohN6Yp
< / code >
< / div >
< / div >
< / div >
< / div >
< / div >
< / body >
< / html >