6367a55312
hashed-mirrors are content addressed. So if $outputHash is in the hashed-mirror, changes from ‘postFetch’ would already be made. So, running postFetch will end up applying the change /again/, which we don’t want.
165 lines
4.1 KiB
Bash
165 lines
4.1 KiB
Bash
source $stdenv/setup
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source $mirrorsFile
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curlVersion=$(curl -V | head -1 | cut -d' ' -f2)
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# Curl flags to handle redirects, not use EPSV, handle cookies for
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# servers to need them during redirects, and work on SSL without a
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# certificate (this isn't a security problem because we check the
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# cryptographic hash of the output anyway).
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curl=(
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curl
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--location
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--max-redirs 20
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--retry 3
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--disable-epsv
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--cookie-jar cookies
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--insecure
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--user-agent "curl/$curlVersion Nixpkgs/$nixpkgsVersion"
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$curlOpts
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$NIX_CURL_FLAGS
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)
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downloadedFile="$out"
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if [ -n "$downloadToTemp" ]; then downloadedFile="$TMPDIR/file"; fi
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tryDownload() {
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local url="$1"
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echo
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header "trying $url"
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local curlexit=18;
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success=
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# if we get error code 18, resume partial download
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while [ $curlexit -eq 18 ]; do
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# keep this inside an if statement, since on failure it doesn't abort the script
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if "${curl[@]}" -C - --fail "$url" --output "$downloadedFile"; then
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success=1
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break
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else
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curlexit=$?;
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fi
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done
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}
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finish() {
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local skipPostFetch="$1"
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set +o noglob
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if [[ $executable == "1" ]]; then
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chmod +x $downloadedFile
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fi
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if [ -z "$skipPostFetch" ]; then
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runHook postFetch
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fi
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exit 0
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}
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tryHashedMirrors() {
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if test -n "$NIX_HASHED_MIRRORS"; then
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hashedMirrors="$NIX_HASHED_MIRRORS"
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fi
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for mirror in $hashedMirrors; do
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url="$mirror/$outputHashAlgo/$outputHash"
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if "${curl[@]}" --retry 0 --connect-timeout "${NIX_CONNECT_TIMEOUT:-15}" \
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--fail --silent --show-error --head "$url" \
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--write-out "%{http_code}" --output /dev/null > code 2> log; then
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tryDownload "$url"
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# We skip postFetch here, because hashed-mirrors are
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# already content addressed. So if $outputHash is in the
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# hashed-mirror, changes from ‘postFetch’ would already be
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# made. So, running postFetch will end up applying the
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# change /again/, which we don’t want.
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if test -n "$success"; then finish skipPostFetch; fi
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else
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# Be quiet about 404 errors, which we interpret as the file
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# not being present on this particular mirror.
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if test "$(cat code)" != 404; then
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echo "error checking the existence of $url:"
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cat log
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fi
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fi
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done
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}
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# URL list may contain ?. No glob expansion for that, please
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set -o noglob
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urls2=
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for url in $urls; do
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if test "${url:0:9}" != "mirror://"; then
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urls2="$urls2 $url"
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else
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url2="${url:9}"; echo "${url2/\// }" > split; read site fileName < split
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#varName="mirror_$site"
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varName="$site" # !!! danger of name clash, fix this
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if test -z "${!varName}"; then
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echo "warning: unknown mirror:// site \`$site'"
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else
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mirrors=${!varName}
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# Allow command-line override by setting NIX_MIRRORS_$site.
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varName="NIX_MIRRORS_$site"
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if test -n "${!varName}"; then mirrors="${!varName}"; fi
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for url3 in $mirrors; do
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urls2="$urls2 $url3$fileName";
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done
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fi
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fi
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done
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urls="$urls2"
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# Restore globbing settings
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set +o noglob
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if test -n "$showURLs"; then
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echo "$urls" > $out
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exit 0
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fi
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if test -n "$preferHashedMirrors"; then
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tryHashedMirrors
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fi
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# URL list may contain ?. No glob expansion for that, please
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set -o noglob
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success=
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for url in $urls; do
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if [ -z "$postFetch" ]; then
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case "$url" in
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https://github.com/*/archive/*)
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echo "warning: archives from GitHub revisions should use fetchFromGitHub"
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;;
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https://gitlab.com/*/-/archive/*)
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echo "warning: archives from GitLab revisions should use fetchFromGitLab"
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;;
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esac
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fi
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tryDownload "$url"
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if test -n "$success"; then finish; fi
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done
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# Restore globbing settings
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set +o noglob
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if test -z "$preferHashedMirrors"; then
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tryHashedMirrors
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fi
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echo "error: cannot download $name from any mirror"
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exit 1
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