1. flog: go to git branches I had checked out in the past quickly

2. pr: preview and check out PRs I've been assigned to review

    flog () {
     branch="$(
        git branch --sort=-committerdate --format="%(committerdate:relative)%09%(refname:short)%09%(subject)" \
        | column -ts $'\t' \
        | fzf \
        | sed 's/.*ago \+\([^ ]*\) .*/\1/'
      )" 
     git co $branch || (
      echo -n "git co $branch" | pbcopy
     )
    }

    errcho() {
      echo "$@" 1>&2
    }
    
    jq_query=$(cat <<- EOF
      map(
          { key: "\(.number)"
          , value:
            { line: "\(.number):\(if .isDraft then "" else " " end):\(.author.login):\(.title):\(.headRefName)"
            , body: "# \(.number): \(.title)
    ## \(.headRefName)
    
    \(.body)"
            }
          }
        )
      | from_entries
    EOF
    )
    
    pr () {
      local gh_user=${1:-}
    
      if [ -z "$gh_user" ]; then
        gh_user="@me"
      fi
    
      tmpFile=$(mktemp /tmp/prs-XXXXXX.json)
    
      cleanup () {
        rm "$tmpFile"
      }
    
      trap cleanup EXIT
      gh pr list -S "review-requested:${gh_user}" \
      --json number,title,headRefName,body,author,isDraft \
      | jq -r "$jq_query" > "$tmpFile"
    
      preview_command="\
        jq -r '.[\"{1}\"].body' $tmpFile \
        | pandoc -f gfm -t markdown      \
        | glow -s light -
      "
      pr_number=$(
        jq -r \
          'to_entries | map(.value.line) | join("
    ")' \
          "$tmpFile" \
        | column -t -s: \
        | fzf                            \
            --ansi                       \
            --delimiter=' '              \
            --preview="$preview_command" \
            --preview-window=up:80%      \
        | grep -o '^[0-9]\+'
      )
    
      if [ -n "$pr_number" ]; then
        errcho "checking out #$pr_number"
        gh pr checkout "$pr_number" && gh pr view --web "$pr_number" && git pull || echo -e "gh pr checkout $pr_number && gh pr view --web $pr_number && git pull"
      else
        errcho "canceled"
      fi
    }