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#!/bin/bash
# This script performs comparison of Vim syntax highlighting with and without
# uncommited changes. It's done by generating HTML files which are then
# compared via `git diff` in word diff mode. Output isn't the easiest one to
# understand, but enough to show unexpected changes and expected effects (line
# numbers are at the left).
#
# Invocation:
# * without arguments to check provided test file;
# * with file name to check changes on specified file.
set -e
dir=$(dirname "$(readlink -f "$0")")
syntax_regression_file="$dir/../tests/test-data/syntax-highlight/syntax.vifm"
if [ $# -eq 1 ]; then
syntax_regression_file="$1"
elif [ $# -ne 0 ]; then
echo "Usage: $(basename "$0") [test file that uses vifm syntax]"
exit 1
fi
if [ ! -r "$syntax_regression_file" ]; then
echo "$(basename "$0"): '$syntax_regression_file' file doesn't exist"
exit 2
fi
# three arguments:
# 1) path to syntax script;
# 2) path to source file;
# 3) path to destination file.
function to_html
{
local syntax_script="$1"
local src="$2"
local out="$src.html"
local dst="$3"
vim -E -s \
+'let g:html_no_progress = 1' \
+'let g:html_line_ids=1' \
+'syntax on' \
+"source $syntax_script" \
+'runtime syntax/2html.vim' \
+'wqa' \
"$src" > /dev/null 2>&1 || true
mv "$out" "$dst"
}
# makes sure temporary files are deleted on normal or error exit
function remove_tmp_files()
{
rm -f "$dir/before.vim" "$dir/after.vifm.html" "$dir/before.vifm.html"
}
trap remove_tmp_files EXIT
git show HEAD:data/vim/syntax/vifm.vim > "$dir/before.vim"
to_html "$dir/before.vim" "$syntax_regression_file" "$dir/before.vifm.html"
to_html "$dir/../data/vim/syntax/vifm.vim" "$syntax_regression_file" \
"$dir/after.vifm.html"
if ! git diff --quiet --no-index "$dir/before.vifm.html" "$dir/after.vifm.html"
then
git diff --no-index --word-diff \
--word-diff-regex='<[^>]+>|[^<>[:space:]]+' \
"$dir/before.vifm.html" "$dir/after.vifm.html" || true
fi
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