31 lines
842 B
Fennel
31 lines
842 B
Fennel
(local json (require :json))
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(local http (require :fetch))
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(local svc (require :anoia.svc))
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(local { : utime } (require :lualinux))
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(fn download [url dest]
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(let [state (.. dest "/state")
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previously (ll.lstat state 12)]
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(match (http.fetch url "i" previously)
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(nil 10 _) ; not modified
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(print (.. url " not modified, already up to date"))
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(nil code str)
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(assert nil (.. "error " code ": " str))
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(body { : last-modified })
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(let [service (svc.open dest)
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lock (.. dest "/.lock")]
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(with-open [fout (io.open lock :w)] (fout:write ""))
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(service:output "." (json.decode body))
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(with-open [fout (io.open state :w)] (fout:write "ok"))
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(utime state last-modified)
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(os.remove lock))
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)))
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(fn run [] (download (. arg 1) (. arg 2)))
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{ : run }
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