nix-prefetch-git: Add support for $NIX_PREFETCH_GIT_DEEP_CLONE.
svn path=/nixpkgs/trunk/; revision=19648
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@ -60,6 +60,14 @@ checkout_ref(){
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local hash="$1";
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local ref="$2";
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if test -n "$NIX_PREFETCH_GIT_DEEP_CLONE"; then
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# The caller explicitly asked for a deep clone. Deep clones
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# allow "git describe" and similar tools to work. See
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# http://thread.gmane.org/gmane.linux.distributions.nixos/3569
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# for a discussion.
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return 1
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fi
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if test -z "$ref"; then
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ref=$(ref_from_hash $hash);
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fi;
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