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url-diff: commpact the settings definitions

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Starbeamrainbowlabs 2020-07-08 20:24:57 +01:00
parent 4230262f64
commit 2fa00047cc
Signed by: sbrl
GPG key ID: 1BE5172E637709C2
1 changed files with 30 additions and 15 deletions
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url-diff.sh
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@ -6,16 +6,21 @@ if [[ ! -z "${URLDIFF_STORAGE_DIR}" ]]; then loc_storage="${URLDIFF_STORAGE_DIR}
loc_firefox_profile="${loc_storage}/firefox-profile"; loc_firefox_profile="${loc_storage}/firefox-profile";
loc_prev_images="${loc_storage}/previous-images"; loc_prev_images="${loc_storage}/previous-images";
highlight_colour="#ff000044"; highlight_colour="${URLDIFF_HIGHLIGHT_COLOUR:-#ff000044}";
if [[ ! -z "${URLDIFF_HIGHLIGHT_COLOUR}" ]]; then highlight_colour="${URLDIFF_HIGHLIGHT_COLOUR}"; fi
quiet="false"; quiet="${URLDIFF_QUIET:-false}";
if [[ ! -z "${URLDIFF_QUIET}" ]]; then quiet="${URLDIFF_QUIET}"; fi
window_width="${URLDIFF_WINDOW_WIDTH}"; window_width="${URLDIFF_WINDOW_WIDTH}";
change_threshold="2"; change_threshold="${URLDIFF_CHANGE_THRESHOLD:-2}";
if [[ ! -z "${URLDIFF_CHANGE_THRESHOLD}" ]]; then change_threshold="${URLDIFF_CHANGE_THRESHOLD}"; fi
###############################################################################
if [[ -z "$(type -p calc)" ]]; then
echo "calc command not detected - it would appear it is not installed" >&2;
echo "Install it like this on debian systems:" >&2;
echo " sudo apt install apcalc" >&2;
fi
############################################################################### ###############################################################################
@ -41,7 +46,9 @@ calculate_percentage_colour() {
image_height="$(identify -format "%[fx:h]" "${loc_image}")"; image_height="$(identify -format "%[fx:h]" "${loc_image}")";
pixel_count_colour="$(convert "${loc_image}" -fill black +opaque "${colour}" -fill white -opaque "${colour}" -format "%[fx:w*h*mean]" info:)"; pixel_count_colour="$(convert "${loc_image}" -fill black +opaque "${colour}" -fill white -opaque "${colour}" -format "%[fx:w*h*mean]" info:)";
echo "(${pixel_count_colour} / (${image_width}*${image_height})) * 100" | bc -l # echo "image_width: ${image_width}, image_height: ${image_height}, pixel_count_colour: ${pixel_count_colour}" >&2;
calc -p "(${pixel_count_colour} / (${image_width}*${image_height})) * 100" | tr -d '~';
} }
############################################################################### ###############################################################################
@ -58,17 +65,19 @@ Usage:
Subcommands: Subcommands:
check {url} {output_diff_image} [{output_apng}] check {url} {output_diff_image} [{output_apng}]
Checks the given URL for differences, and saves a diff image to a Checks the given URL for differences, and saves a diff
specified location. Exits with code 0 if differences are found, or code image to a specified location. Exits with code 0 if
1 if no differences are found. differences are found, or code 1 if no differences are
Optionally generates an animated PNG that alternates between the 2 screenshots. found.
Optionally generates an animated PNG that alternates
between the 2 screenshots.
Environment Variables: Environment Variables:
Variable Default variable Variable Default variable
---------------------------------------------------------------------- ----------------------------------------------------------------------
URLDIFF_STORAGE_DIR ~/.config/url-diff URLDIFF_STORAGE_DIR ~/.config/url-diff
The directory in which previous images are stored to diff against. The directory in which previous images are stored to diff
The firefox profile is also stored in here. against. The firefox profile is also stored in here.
URLDIFF_HIGHLIGHT_COLOUR #ffffffcc URLDIFF_HIGHLIGHT_COLOUR #ffffffcc
The colour to highlight any changes in. The colour to highlight any changes in.
@ -77,7 +86,8 @@ Environment Variables:
The window width to tell firefox to screenshot with. The window width to tell firefox to screenshot with.
URLDIFF_CHANGE_THRESHOLD 2 URLDIFF_CHANGE_THRESHOLD 2
The percentage of the screenshot that should have changed for it to count. The percentage of the screenshot that should have
changed for it to count.
Allows for ignoring random minor rendering artifacts. Allows for ignoring random minor rendering artifacts.
" >&2; " >&2;
fi fi
@ -129,10 +139,15 @@ case "${mode}" in
# Work out how much of the image has changed # Work out how much of the image has changed
percentage_changed="$(calculate_percentage_colour "${tmpdir}/transp.png" "${highlight_colour}")"; percentage_changed="$(calculate_percentage_colour "${tmpdir}/transp.png" "${highlight_colour}")";
if [[ -z "${percentage_changed}" ]]; then
echo "Something went wrong when calculating the percentage changed - no value was returned";
exit 1;
fi
log_msg "Changed: ${percentage_changed}%"; log_msg "Changed: ${percentage_changed}%";
# if [[ "${img_hash_new}" == "${img_hash_old}" ]]; then # if [[ "${img_hash_new}" == "${img_hash_old}" ]]; then
if [[ "$(echo "${percentage_changed} > ${change_threshold}" | bc -l)" -eq 0 ]]; then if [[ "$(calc -p "${percentage_changed} > ${change_threshold}")" -eq 0 ]]; then
log_msg "No changes detected."; log_msg "No changes detected.";
exit 1; exit 1;
fi fi