add TRUNCATE_TO_UNIQUE shortening dir strategy

This creates the shortest unique path elements that can be unambiguously expanded to the original path.
pull/22/head
Miroslav Šedivý 7 years ago
parent 50ecdfd57a
commit 73a9ee7c87

@ -313,6 +313,7 @@ Customizations available are:
|`truncate_from_right`|Just leaves the beginning of a folder name untouched. E.g. your folders will be truncated like so: "/ro../Pr../office". How many characters will be untouched is controlled by `POWERLEVEL9K_SHORTEN_DIR_LENGTH`.|
|`truncate_with_package_name`|Search for a `package.json` or `composer.json` and prints the `name` field to abbreviate the directory path. The precedence and/or files could be set by `POWERLEVEL9K_DIR_PACKAGE_FILES=(package.json composer.json)`. If you have [jq](https://stedolan.github.io/jq/) installed, it will dramatically improve the speed of this strategy.|
|`truncate_with_folder_marker`|Search for a file that is specified by `POWERLEVEL9K_SHORTEN_FOLDER_MARKER` and truncate everything before that (if found, otherwise stop on $HOME and ROOT).|
|`truncate_to_unique`|Parse all parent path components and truncate them to the shortest unique length. If you copy&paste the result to a shell, after hitting TAB it should expand to the original path unambiguously.|
For example, if you wanted the truncation behavior of the `fish` shell, which
truncates `/usr/share/plasma` to `/u/s/plasma`, you would use the following:

@ -709,6 +709,27 @@ prompt_dir() {
# the current path.
current_path=$current_path${PWD#${last_marked_folder}*}
;;
truncate_to_unique)
# for each parent path component find the shortest unique beginning
# characters sequence
paths=(${(s:/:)PWD})
cur_path='/'
cur_short_path='/'
for directory in ${paths[@]}
do
cur_dir=''
for (( i=0; i<${#directory}; i++ )); do
cur_dir+="${directory:$i:1}"
matching=("$cur_path"/"$cur_dir"*/)
if [[ ${#matching[@]} -eq 1 ]]; then
break
fi
done
cur_short_path+="$cur_dir/"
cur_path+="$directory/"
done
current_path="${cur_short_path: : -1}"
;;
*)
current_path="$(print -P "%$((POWERLEVEL9K_SHORTEN_DIR_LENGTH+1))(c:$POWERLEVEL9K_SHORTEN_DELIMITER/:)%${POWERLEVEL9K_SHORTEN_DIR_LENGTH}c")"
;;

@ -381,4 +381,25 @@ function testOmittingFirstCharacterWorksWithChangingPathSeparatorAndRightTruncat
unset POWERLEVEL9K_SHORTEN_STRATEGY
}
function testTruncateToUniqueWorks() {
POWERLEVEL9K_DIR_OMIT_FIRST_CHARACTER=true
POWERLEVEL9K_DIR_PATH_SEPARATOR='xXx'
POWERLEVEL9K_SHORTEN_DIR_LENGTH=2
POWERLEVEL9K_SHORTEN_STRATEGY='truncate_to_unique'
mkdir -p /tmp/powerlevel9k-test/adam/devl
mkdir -p /tmp/powerlevel9k-test/alice/devl
mkdir -p /tmp/powerlevel9k-test/alice/docs
mkdir -p /tmp/powerlevel9k-test/bob/docs
cd /tmp/powerlevel9k-test/alice/devl
assertEquals "%K{blue} %F{black}txXxpxXxalxXxde %k%F{blue}%f " "$(build_left_prompt)"
cd -
rm -fr /tmp/powerlevel9k-test
unset POWERLEVEL9K_DIR_PATH_SEPARATOR
unset POWERLEVEL9K_DIR_OMIT_FIRST_CHARACTER
unset POWERLEVEL9K_SHORTEN_DIR_LENGTH
unset POWERLEVEL9K_SHORTEN_STRATEGY
}
source shunit2/source/2.1/src/shunit2

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