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Specify --speed-limit and --speed-time for the fetch script #4457

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Specify --speed-limit and --speed-time for the fetch script #4457

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20 changes: 15 additions & 5 deletions rustup-init.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -791,17 +791,27 @@ check_help_for() {

# Check if curl supports the --retry flag, then pass it to the curl invocation.
check_curl_for_retry_support() {
local _retry_supported=""
local _retry_part=""
local _continue_part=""
local _speed_limit_part=""

# "unspecified" is for arch, allows for possibility old OS using macports, homebrew, etc.
if check_help_for "notspecified" "curl" "--retry"; then
_retry_supported="--retry 3"
_retry_part="--retry 3"

if check_help_for "notspecified" "curl" "--continue-at"; then
# "-C -" tells curl to automatically find where to resume the download when retrying.
_retry_supported="--retry 3 -C -"
# "--continue-at -" tells curl to automatically find where to resume the download when retrying.
_continue_part="--continue-at -"
fi

if check_help_for "notspecified" "curl" "--speed-limit" \
&& check_help_for "notspecified" "curl" "--speed-time"; then
# 250000 is approximately 20% of the bandwidth of typical DSL
_speed_limit_part="--speed-limit 250000 --speed-time 15"
fi
fi

RETVAL="$_retry_supported"
RETVAL="$_retry_part $_continue_part $_speed_limit_part"
}

# Return cipher suite string specified by user, otherwise return strong TLS 1.2-1.3 cipher suites
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