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Detect gsed and use it if it exists #25

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Feb 10, 2016
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14 changes: 8 additions & 6 deletions diff-so-fancy
Original file line number Diff line number Diff line change
Expand Up @@ -4,31 +4,33 @@

diff_highlight="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )/third_party/diff-highlight/diff-highlight"

hash gsed 2>/dev/null && SED=gsed || SED=sed

color_code_regex=$'(\x1B\\[([0-9]{1,2}(;[0-9]{1,2})?)[m|K])?'
reset_color="\x1B\[m"
dim_magenta="\x1B\[38;05;146m"

format_diff_header () {
# simplify the unified patch diff header
sed -E "s/^($color_code_regex)diff --git .*$//g" | \
sed -E "s/^($color_code_regex)index .*$/\
$SED -E "s/^($color_code_regex)diff --git .*$//g" | \
$SED -E "s/^($color_code_regex)index .*$/\
\1$(print_horizontal_rule)/g" | \
sed -E "s/^($color_code_regex)\+\+\+(.*)$/\1\+\+\+\5\\
$SED -E "s/^($color_code_regex)\+\+\+(.*)$/\1\+\+\+\5\\
\1$(print_horizontal_rule)/g"
}

colorize_context_line () {
# extra color for @@ context line
sed -E "s/@@$reset_color $reset_color(.*$)/@@ $dim_magenta\1/g"
$SED -E "s/@@$reset_color $reset_color(.*$)/@@ $dim_magenta\1/g"
}

strip_leading_symbols () {
# strip the + and -
sed -E "s/^($color_code_regex)[\+\-]/\1 /g"
$SED -E "s/^($color_code_regex)[\+\-]/\1 /g"
}

print_horizontal_rule () {
printf "%$(tput cols)s\n"| sed 's/ /─/g'
printf "%$(tput cols)s\n"| $SED 's/ /─/g'
}

# run it.
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2 changes: 1 addition & 1 deletion readme.md
Original file line number Diff line number Diff line change
Expand Up @@ -49,7 +49,7 @@ Note: The `diff-highlight` dependency is an [official git-contrib script](https:
### Install GNU `sed`
You'll need GNU sed. On Mac, it's easy to install with Homebrew.
```shell
brew install gnu-sed --with-default-names # Without the default-names flag, you'll have to use it via `gsed`
brew install gnu-sed
```

### Improved colors for the the highlighted bits
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