prezto_config/plugins/git/functions/git-hub

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# Open the GitHub repository in the browser.
local remote branches branch current_branch url
remote="${1:-origin}"
url=$(
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git config -l \
| grep "remote.${remote}.url" \
| sed -En "s/remote.${remote}.url=(git|https?)(@|:\/\/)github.com(:|\/)(.+)\/(.+).git/https:\/\/github.com\/\4\/\5/p"
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)
branches=($(
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git branch -r | sed -e "/${remote}\/HEAD -> ${remote}/d" -e "s/^[[:space:]]*${remote}\///g"
))
current_branch="$(git-branch)"
branch="${2:-master}"
if [[ -z "$2" ]]; then
if (( $branches[(I)$current_branch] != 0 )); then
branch="$current_branch"
else
branch='master'
fi
fi
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if [[ -n "$url" ]]; then
url="${url}/tree/${branch}"
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if (( $+commands[$BROWSER] )); then
"$BROWSER" "$url"
return 0
else
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print "$0: browser not set or set to a non-existent browser" >&2
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return 1
fi
else
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print "$0: not a Git repository or remote origin not set" >&2
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return 1
fi