Name a mirror for everything GNU hosts - #182
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ftp.gnu.org refused connections for over two minutes at a time through 26 and 27 August, and each time it took a whole build with it: six components come from there and gdb is downloaded by every host, so one outage is a red pipeline rather than a slow one. Three softfp builds died this way without saying anything about softfp. Each of the six now names ftpmirror.gnu.org first -- GNU's own redirector to a nearby mirror -- and keeps ftp.gnu.org behind it. ExternalProject tries them in order, and URL_HASH decides whether what came back is the right bytes, so a mirror serving something else fails the way a corrupt download does. Checked against the redirector: gdb-15.2.tar.xz comes back with the sha256 already pinned here. The test refuses a component that names one host, or that does not try the mirror first, or that has no hash to check a mirror against.
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ftp.gnu.orgrefused connections for over two minutes at a time through 26 and 27 August:Six components come from there and gdb is downloaded by every host, so one outage is a red pipeline rather than a slow one. Three softfp builds died this way today without saying anything about softfp.
Each of the six now names
ftpmirror.gnu.orgfirst — GNU's own redirector to a nearby mirror — and keepsftp.gnu.orgbehind it.ExternalProjecttries them in order, andURL_HASHdecides whether what came back is the right bytes, so a mirror serving something else fails the way a corrupt download does.Checked against the redirector:
The test refuses a component that names one host, that does not try the mirror first, or that has no hash to check a mirror against.
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