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url-diff
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url-diff: commpact the settings definitions

This commit is contained in:
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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45
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="${loc_storage}/firefox-profile";
loc_prev_images="${loc_storage}/previous-images";
highlight_colour="#ff000044";
if [[ ! -z "${URLDIFF_HIGHLIGHT_COLOUR}" ]]; then highlight_colour="${URLDIFF_HIGHLIGHT_COLOUR}"; fi
highlight_colour="${URLDIFF_HIGHLIGHT_COLOUR:-#ff000044}";
quiet="false";
if [[ ! -z "${URLDIFF_QUIET}" ]]; then quiet="${URLDIFF_QUIET}"; fi
quiet="${URLDIFF_QUIET:-false}";
window_width="${URLDIFF_WINDOW_WIDTH}";
change_threshold="2";
if [[ ! -z "${URLDIFF_CHANGE_THRESHOLD}" ]]; then change_threshold="${URLDIFF_CHANGE_THRESHOLD}"; fi
change_threshold="${URLDIFF_CHANGE_THRESHOLD:-2}";
###############################################################################
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]" "${loc_image}")";
pixel_count_colour="$(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:
check {url} {output_diff_image} [{output_apng}]
Checks the given URL for differences, and saves a diff image to a
specified location. Exits with code 0 if differences are found, or code
1 if no differences are found.
Optionally generates an animated PNG that alternates between the 2 screenshots.
Checks the given URL for differences, and saves a diff
image to a specified location. Exits with code 0 if
differences are found, or code 1 if no differences are
found.
Optionally generates an animated PNG that alternates
between the 2 screenshots.
Environment Variables:
Variable Default variable
----------------------------------------------------------------------
URLDIFF_STORAGE_DIR ~/.config/url-diff
The directory in which previous images are stored to diff against.
The firefox profile is also stored in here.
The directory in which previous images are stored to diff
against. The firefox profile is also stored in here.
URLDIFF_HIGHLIGHT_COLOUR #ffffffcc
The colour to highlight any changes in.
@ -77,7 +86,8 @@ Environment Variables:
The window width to tell firefox to screenshot with.
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.
" >&2;
fi
@ -129,10 +139,15 @@ case "${mode}" in
# Work out how much of the image has changed
percentage_changed="$(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: ${percentage_changed}%";
# if [[ "${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.";
exit 1;
fi