wave how can i debug `ExternalTool` download details i ve l Pants #general

:wave: — how can i debug `ExternalTool` download d...

freezing-lamp-12123

11/01/2022, 1:54 PM

👋 — how can i debug

ExternalTool

download details? .. i’ve looked at the documentation and according to my own local tools i have entered the proper values for checksum + size, but … pants does not really like me: all i get is (with debug logging as well):

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14:51:39.58 [DEBUG] (workunit_store) Completed: Downloading: <https://github.com/google/go-jsonnet/releases/download/v0.19.1/go-jsonnet_0.19.1_Darwin_arm64.tar.gz> (2.87 MB)

14:51:39.58 [ERROR] (pants.bin.local_pants_runner) 1 Exception encountered:

  Exception: Error hashing/capturing URL fetch response: Downloaded file was larger than expected digest

output from running checks on my local system:

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❯ shasum -a 256 ~/Downloads/go-jsonnet_0.19.1_Darwin_arm64.tar.gz
c7a98187b4b167e9e885dba52138ed802d4db4635b47b95af6a82448ff9d7ba1  /Users/dreuss/Downloads/go-jsonnet_0.19.1_Darwin_arm64.tar.gz

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❯ wc -c /Users/dreuss/Downloads/go-jsonnet_0.19.1_Darwin_arm64.tar.gz
 3004958 /Users/dreuss/Downloads/go-jsonnet_0.19.1_Darwin_arm64.tar.gz

external tool known versions config:

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default_known_versions = [
        "v0.19.1|macos_arm64|c7a98187b4b167e9e885dba52138ed802d4db4635b47b95af6a82448ff9d7ba1|3004948",
    ]

✅ 1

hundreds-father-404

11/01/2022, 1:54 PM

Hi! Maybeee

-ldebug

says something but I don't think it does. How are you calculating the two values? It sounds like the num bytes is the issue, not the sha256

freezing-lamp-12123

11/01/2022, 1:59 PM

so, after looking at things again, i clearly have the size wrong, and it works after fixing that 🤦‍♂️

❤️ 1

freezing-lamp-12123

11/01/2022, 2:00 PM

i think i had an old copy lying around i was checking the size on, and that apparently changed at some point — pebcak on my end, but … it would be nice if debug logs could output the values that it calculated (checksum and size) so it would be easy to verify if you got things wrong 🙏

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hundreds-father-404

11/01/2022, 2:16 PM

glad it's working!

enough-analyst-54434

11/01/2022, 3:50 PM

Well, on size we could only help you "half" the time. If the size you state is too small, we'll (hopefully!) only read up to that amount of bytes off the wire. It's only if the size you configured is too big that we could tell you the actual was smaller. The size configuration is a ~security measure in that sense. Sha256 alone is perfectly more than fine for verifying identity, it's just that you could feed it an infinite stream of bytes.

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