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Optimize in_hg and hg_get_branch_name

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When not in the repo root dir `in_hg` used `hg summary` which is terribly slow on big repositories, and `hg_get_branch_name` called `hg branch` which is also pretty slow as well.

Based on the [branch](https://github.com/robbyrussell/oh-my-zsh/tree/master/plugins/branch) plugin, I created the function `hg_get_dir` that fetch the `.hg` directory if it exists, going up in the directory tree. From there, we know if we're in an HG repository if `in_hg` returns a non empty string, and we can simply get the branch name from the content of the `.hg/branch` file.

### Benchmarks

Based on 10 calls to `hg_get_branch_name` in subdir (so that the old `hg summary` is called), here are the average times:
* Before: `/tmp/test.zsh  0.08s user 0.04s system 96% cpu 0.133 total`
* After: `/tmp/test.zsh  0.00s user 0.00s system 71% cpu 0.008 total`

It's faster and it uses less CPU!

The other changes after that are purely esthetic (fit in 80 columns and indentation fix).
This commit is contained in:
Creak 2016-11-06 12:30:31 -05:00 committed by GitHub
parent 0b340bc3a5
commit 3ee22a4ebc
1 changed files with 29 additions and 10 deletions
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39
plugins/mercurial/mercurial.plugin.zsh
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@ -18,25 +18,44 @@ alias hgca='hg commit --amend'
# list unresolved files (since hg does not list unmerged files in the status command)
alias hgun='hg resolve --list'
function hg_get_dir() {
# Defines path as current directory
local current_dir=$PWD
# While current path is not root path
while [[ $current_dir != '/' ]]; do
if [[ -d "${current_dir}/.hg" ]]; then
echo "${current_dir}/.hg"
return
fi
# Defines path as parent directory and keeps looking for
current_dir="${current_dir:h}"
done
}
function in_hg() {
if [[ -d .hg ]] || $(hg summary > /dev/null 2>&1); then
if [[ $(hg_get_dir) != "" ]]; then
echo 1
fi
}
function hg_get_branch_name() {
if [ $(in_hg) ]; then
echo $(hg branch)
local hg_dir=$(hg_get_dir)
if [[ $hg_dir != "" ]]; then
if [[ -f "${hg_dir}/branch" ]]; then
echo $(<"${hg_dir}/branch")
else
echo "default"
fi
fi
}
function hg_prompt_info {
if [ $(in_hg) ]; then
_DISPLAY=$(hg_get_branch_name)
local branch=$(hg_get_branch_name)
if [[ $branch != "" ]]; then
echo "$ZSH_PROMPT_BASE_COLOR$ZSH_THEME_HG_PROMPT_PREFIX\
$ZSH_THEME_REPO_NAME_COLOR$_DISPLAY$ZSH_PROMPT_BASE_COLOR$ZSH_PROMPT_BASE_COLOR$(hg_dirty)$ZSH_THEME_HG_PROMPT_SUFFIX$ZSH_PROMPT_BASE_COLOR"
unset _DISPLAY
fi
$ZSH_THEME_REPO_NAME_COLOR${display}$ZSH_PROMPT_BASE_COLOR\
$ZSH_PROMPT_BASE_COLOR$(hg_dirty)$ZSH_THEME_HG_PROMPT_SUFFIX\
$ZSH_PROMPT_BASE_COLOR"
}
function hg_dirty_choose {
@ -57,9 +76,9 @@ function hg_dirty {
}
function hgic() {
hg incoming "$@" | grep "changeset" | wc -l
hg incoming "$@" | grep "changeset" | wc -l
}
function hgoc() {
hg outgoing "$@" | grep "changeset" | wc -l
hg outgoing "$@" | grep "changeset" | wc -l
}