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git-submodule.sh: shorten submodule SHA-1s using rev-parse
Until now, `git submodule summary` was always emitting 7-character SHA-1s that have a higher chance of being ambiguous for larger repositories. Use `git rev-parse --short` instead, which will determine suitable short SHA-1 lengths. When a submodule hasn't been initialized with "submodule init" or not cloned, `git rev-parse` would not work in it yet; as a fallback, use the original method of cutting at 7 hexdigits. Signed-off-by: Sven van Haastregt <svenvh@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -850,8 +850,11 @@ cmd_summary() {
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;;
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esac
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sha1_abbr_src=$(echo $sha1_src | cut -c1-7)
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sha1_abbr_dst=$(echo $sha1_dst | cut -c1-7)
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sha1_abbr_src=$(GIT_DIR="$name/.git" git rev-parse --short $sha1_src 2>/dev/null ||
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echo $sha1_src | cut -c1-7)
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sha1_abbr_dst=$(GIT_DIR="$name/.git" git rev-parse --short $sha1_dst 2>/dev/null ||
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echo $sha1_dst | cut -c1-7)
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if test $status = T
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then
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blob="$(gettext "blob")"
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