devel-addpkg

#!/usr/bin/env bash

# Exit with an error if no arguments are given
[[ -z "$1" ]] && {
    printf '%s\n' "Error: no arguments provided, please provide the name of the package you wish to add" >&2
    exit 1
}

# Change to the script directory and remember where it is
cd "${0%/*}"

# The config file to load
config='pkgupdates.conf'

# Load the config if it exists
[[ -f "$config" ]] && source "$config"

# Load the default if it isn't in the config
[[ -z "$DEVELVERSION_CONF" ]] && DEVELVERSION_CONF="$PWD/develversion.conf"

# Create a temp directory
tmp_dir="$(mktemp -d)"
tmp_config="$tmp_dir/"$(sed 's|^.*\/||' <<< "$DEVELVERSION_CONF")

function tmpdir_cleanup {
    # Remove the temp file if it exists
    [[ -f "$tmp_config" ]] \
        && rm "$tmp_config"

    # Remove the temp directory if it exists
    [[ -d "$tmp_dir" ]] \
        && rmdir "$tmp_dir"
}

function error {
    tmpdir_cleanup
    printf '%s\n' "Error: $1" >&2
    exit 1
}

# Copy the config to the temp location
cp "$DEVELVERSION_CONF" "$tmp_config"

# Add the new package to the temp config and sort the config alphabetically
printf '%s\n' "$1" >> "$tmp_config"
sort -u -o "$tmp_config" "$tmp_config"

# fail if the new package can't be found in the temp config
egrep -q "^$1$" "$tmp_config" \
    || error "tried and failed to add package"

# fail if the temp config isn't one line longer than the old
[[ $(( $(wc -l "$DEVELVERSION_CONF" | sed 's|\ .*$||') + 1 )) = $(wc -l "$tmp_config" | sed 's|\ .*$||') ]] \
    || error "package already contained in $DEVELVERSION_CONF"

# Things should be good if we haven't failed yet, so let's make the new config official and cleanup
mv "$tmp_config" "$DEVELVERSION_CONF"
tmpdir_cleanup