Returns (complete) count of rows from gerrit api searches (gerrit.website/r/changes/?q=some-search-string)

gerrit-search-count.sh

#!/usr/bin/env bash
################################################################################
# Author: [email protected]
# License: Apache 2 <https://opensource.org/licenses/Apache-2.0>
# Description:
#   A way to get (complete) row counts for gerrit searches via its api
################################################################################
set -euo pipefail

# validate arguments
if ([ -z ${1+x} ]); then
    printf "One argument required: {gerrit search url}.  Exiting.\n"
    exit 1
fi

# set variables
readonly gerrit_search_url="$1"
readonly gerrit_max_results=500

# Description: Check binary dependencies
# Arguments: List of binaries from args
# Output: Error message and exit
function check_binaries() {
    bins="$@"
    for bin in "${bins[@]}"; do
        if [[ -z $(command -v $bin) ]]; then
            printf "Dependency '$bin' does not appear to be installed.\n"
            printf "Exiting for now...\n"
            exit 1
        fi  
    done
}

# Description: run curl against gerrit api searches and get count
# Arguments: $1 = gerrit api search (without start/end)
# Outputs: row count total
function get_total_row_count() {
    local total_count=0
    local next=1

    initial_req_data=$(curl -s "$gerrit_search_url")
    initial_count=$(echo "$initial_req_data" | sed 1d | jq '. | length')
    more_results=$(echo "$initial_req_data" | sed '1d' | jq '. | last._more_changes')
    total_count=$(($total_count + $initial_count))

    while [ "$more_results" = "true" ]
    do
        next=$(($next + $gerrit_max_results))
        next_req_data=$(curl -s "$gerrit_search_url""&S=""$next")
        next_count=$(echo "$next_req_data" | sed 1d | jq '. | length')
        more_results=$(echo "$next_req_data" | sed '1d' | jq '. | last._more_changes')
        total_count=$(($total_count + $next_count))
    done

    echo "$total_count"
}

# Description: Main
# Arguments: Arguments provided to the script
# Output: None
function main() {
    # set bin dependencies
    local bins=("curl" "sed" "jq")
    check_binaries "${bins[@]}"
    get_total_row_count
}

# Call main()
main "$@"