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@@ -58,23 +58,20 @@ function is_update_available() {
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local local_head
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local_head=$(git -C "$ZSH" rev-parse $branch 2>/dev/null) || return 0
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- # Get remote HEAD. If we can't get it assume there are updates unless there is no connection:
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- # - curl: 6 (could not resolve) or 7 (could not connect)
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- # - wget: 4 (network unreachable)
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- # - fetch: 1 (no route to host)
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- local remote_head ret
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+ # Get remote HEAD. If no suitable command is found assume there are updates
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+ # On any other error, skip the update (connection may be down)
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+ local remote_head
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remote_head=$(
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- curl -fsSL -H 'Accept: application/vnd.github.v3.sha' $api_url 2>/dev/null || {
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- [[ $? -eq 6 || $? -eq 7 ]] && exit 1
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- } || wget -O- --header='Accept: application/vnd.github.v3.sha' $api_url 2>/dev/null || {
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- [[ $? -eq 4 ]] && exit 1
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- } || HTTP_ACCEPT='Accept: application/vnd.github.v3.sha' fetch -o - $api_url 2>/dev/null || {
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- [[ $? -eq 1 ]] && exit 1
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- } || exit 0
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- )
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-
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- # If can't fetch remote HEAD, return exit code
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- ret=$?; [[ -n "$remote_head" ]] || return $ret
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+ if (( ${+commands[curl]} )); then
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+ curl -fsSL -H 'Accept: application/vnd.github.v3.sha' $api_url 2>/dev/null
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+ elif (( ${+commands[wget]} )); then
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+ wget -O- --header='Accept: application/vnd.github.v3.sha' $api_url 2>/dev/null
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+ elif (( ${+commands[fetch]} )); then
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+ HTTP_ACCEPT='Accept: application/vnd.github.v3.sha' fetch -o - $api_url 2>/dev/null
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+ else
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+ exit 0
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+ fi
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+ ) || return 1
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# Compare local and remote HEADs
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[[ "$local_head" != "$remote_head" ]]
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