Optional async check for latest version

every 30 days, storing it in a .latest_version file.

Also allow disabling this with:

    zstyle ':zim' disable-version-check yes

.gitignore

@@ -2,6 +2,7 @@
 *.zwc
 *.zwc.old
 /modules/
+.latest_version
 /init.zsh
 /init.zsh.old
 /login_init.zsh

CHANGELOG.md

@@ -10,7 +10,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - `help` and `version` actions.
 - `-v` verbose option. Normal mode output is now cleaner and more focused.
-- Check the latest version using `git ls-remote`.
+- Asynchronously check the latest version every 30 days. This can be disabled
+  with `zstyle ':zim' disable-version-check yes`.
 
 ### Changed
 - When upgrading, download latest release asset instead of raw file from the

README.md

@@ -48,7 +48,7 @@ Installing Zim is easy:
         wget -nv -O - https://raw.githubusercontent.com/zimfw/install/master/install.zsh | zsh
 
 Open a new terminal and you're done! Enjoy your Zsh IMproved! Take some time to
-read about the [available modules] and tweak your `.zshrc` file.
+read about the [available modules] and tweak your `~/.zshrc` file.
 
 If you have a different shell framework installed (like oh-my-zsh or prezto),
 *uninstall those first to prevent conflicts*.
@@ -92,7 +92,7 @@ are equivalent: `name`, `zimfw/name`, `https://github.com/zimfw/name.git`.
 By default, the module name is the last component in the `<url>`. Use the
 `-n|--name <module_name>` option to set a custom module name.
 
-#### Repository options
+Repository options:
 
 * `-b|--branch <branch_name>`: Use specified branch when installing and
   updating the module. Overrides the tag option. Default: `master`.
@@ -100,7 +100,7 @@ By default, the module name is the last component in the `<url>`. Use the
   module. Overrides the branch option.
 * `-z|--frozen`: Don't install or update the module.
 
-#### Initialization options
+Initialization options:
 
 * `-f|--fpath <path>`: Add specified path to `fpath`. The path is relative to
   the module root directory. Default: `functions`, if the subdirectory exists.
@@ -109,27 +109,27 @@ By default, the module name is the last component in the `<url>`. Use the
 * `-s|--source <file_path>`: Source specified file. The file path is relative
   to the module root directory. Default: the file with largest size matching
   `{init.zsh|module_name.{zsh|plugin.zsh|zsh-theme|sh}}`, if any exists.
-* `-d|--disabled`: Don't use or uninstall the module.
+* `-d|--disabled`: Don't initialize or uninstall the module.
 
 ### zimfw
 
-Added new modules to `~/.zimrc`? Run:
+Added new modules to `~/.zimrc`? Run `zimfw install`.
 
-    zimfw install
+Removed modules from `~/.zimrc`? Run `zimfw uninstall`.
 
-Removed modules from `~/.zimrc`? Run:
+Want to update your modules to their latest revisions? Run `zimfw update`.
 
-    zimfw uninstall
+Want to upgrade `zimfw` to its latest version? Run `zimfw upgrade`.
 
-Want to update your modules to their latest revisions? Run:
-
-    zimfw update
+For more information about the `zimfw` tool, run `zimfw help`.
 
-Want to upgrade `~/.zim/zimfw.zsh` to the latest version? Run:
+Settings
+--------
 
-    zimfw upgrade
+By default, every 30 days `zimfw` will check if it has a new version available.
+This can be disabled with:
 
-For more information about the `zimfw` tool, run `zimfw help`.
+    zstyle ':zim' disable-version-check yes
 
 Uninstalling
 ------------

src/stage2/40_zimfw_version_check.zsh.erb

@@ -0,0 +1,16 @@
+_zimfw_version_check() {
+  if (( _zprintlevel > 0 )); then
+    setopt LOCAL_OPTIONS EXTENDED_GLOB
+    local -r ztarget=${ZIM_HOME}/.latest_version
+    # If .latest_version does not exist or was not modified in the last 30 days
+    if [[ ! -f ${ztarget}(#qNm-30) ]]; then
+      command git ls-remote --tags --refs https://github.com/zimfw/zimfw.git 'v*' | \
+          command sed 's?^.*/v??' | command sort -n -t. -k1,1 -k2,2 -k3,3 | \
+          command tail -n1 >! ${ztarget} &!
+    fi
+    local -r zlatest_version=$(<${ztarget})
+    if [[ -n ${zlatest_version} && ${_zversion} != ${zlatest_version} ]]; then
+      print -PR "%F{yellow}Latest zimfw version is %B${zlatest_version}%b. You're using version %B${_zversion}%b. Run %Bzimfw upgrade%b to upgrade.%f"$'\n'
+    fi
+  fi
+}

src/stage2/50_zimfw_info.zsh.erb

@@ -1,6 +1,6 @@
 _zimfw_info() {
-  print -R 'Zim version:  '${_zversion}' (previous commit is <%= `git rev-parse --short HEAD | tr -d '\r\n'` %>)'
-  print -R 'ZIM_HOME:     '${ZIM_HOME}
-  print -R 'Zsh version:  '${ZSH_VERSION}
-  print -R 'System info:  '$(command uname -a)
+  print -R 'zimfw version: '${_zversion}' (previous commit is <%= `git rev-parse --short HEAD | tr -d '\r\n'` %>)'
+  print -R 'ZIM_HOME:      '${ZIM_HOME}
+  print -R 'Zsh version:   '${ZSH_VERSION}
+  print -R 'System info:   '$(command uname -a)
 }

src/stage2/80_zimfw.zsh.erb

@@ -37,11 +37,8 @@ Options:
     esac
   fi
 
-  if (( _zprintlevel > 0 )); then
-    local -r zlatestversion=$(command git ls-remote --tags --refs https://github.com/zimfw/zimfw.git 'v*' | sed 's?^.*/v??' | sort -n -t. -k1,1 -k2,2 -k3,3 | tail -n1)
-    if [[ ${_zversion} != ${zlatestversion} ]]; then
-      print -PR "%F{yellow}Latest zimfw version is %B${zlatestversion}%b. You're using version %B${_zversion}%b. Run %Bzimfw upgrade%b to upgrade.%f"$'\n'
-    fi
+  if ! zstyle -t ':zim' disable-version-check; then
+    _zimfw_version_check
   fi
 
   case ${1} in

zimfw.zsh

@@ -236,6 +236,23 @@ _zimfw_source_zimrc() {
   fi
 }
 
+_zimfw_version_check() {
+  if (( _zprintlevel > 0 )); then
+    setopt LOCAL_OPTIONS EXTENDED_GLOB
+    local -r ztarget=${ZIM_HOME}/.latest_version
+    # If .latest_version does not exist or was not modified in the last 30 days
+    if [[ ! -f ${ztarget}(#qNm-30) ]]; then
+      command git ls-remote --tags --refs https://github.com/zimfw/zimfw.git 'v*' | \
+          command sed 's?^.*/v??' | command sort -n -t. -k1,1 -k2,2 -k3,3 | \
+          command tail -n1 >! ${ztarget} &!
+    fi
+    local -r zlatest_version=$(<${ztarget})
+    if [[ -n ${zlatest_version} && ${_zversion} != ${zlatest_version} ]]; then
+      print -PR "%F{yellow}Latest zimfw version is %B${zlatest_version}%b. You're using version %B${_zversion}%b. Run %Bzimfw upgrade%b to upgrade.%f"$'\n'
+    fi
+  fi
+}
+
 _zimfw_clean_compiled() {
   local zopt
   (( _zprintlevel > 0 )) && zopt='-v'
@@ -259,10 +276,10 @@ _zimfw_compile() {
 }
 
 _zimfw_info() {
-  print -R 'Zim version:  '${_zversion}' (previous commit is be2be83)'
-  print -R 'ZIM_HOME:     '${ZIM_HOME}
-  print -R 'Zsh version:  '${ZSH_VERSION}
-  print -R 'System info:  '$(command uname -a)
+  print -R 'zimfw version: '${_zversion}' (previous commit is 7fdf65c)'
+  print -R 'ZIM_HOME:      '${ZIM_HOME}
+  print -R 'Zsh version:   '${ZSH_VERSION}
+  print -R 'System info:   '$(command uname -a)
 }
 
 _zimfw_uninstall() {
@@ -338,11 +355,8 @@ Options:
     esac
   fi
 
-  if (( _zprintlevel > 0 )); then
-    local -r zlatestversion=$(command git ls-remote --tags --refs https://github.com/zimfw/zimfw.git 'v*' | sed 's?^.*/v??' | sort -n -t. -k1,1 -k2,2 -k3,3 | tail -n1)
-    if [[ ${_zversion} != ${zlatestversion} ]]; then
-      print -PR "%F{yellow}Latest zimfw version is %B${zlatestversion}%b. You're using version %B${_zversion}%b. Run %Bzimfw upgrade%b to upgrade.%f"$'\n'
-    fi
+  if ! zstyle -t ':zim' disable-version-check; then
+    _zimfw_version_check
   fi
 
   case ${1} in