[#221] Do not format undefined zstyles

modules/git/functions/git-info

@@ -206,132 +206,146 @@ function git-info {
   # Used to abort and turn git-info off on SIGINT.
   _git_info_executing=true
 
-  # Use porcelain status for easy parsing.
-  status_cmd='git status --porcelain'
-
-  # Gets the remote name.
-  remote_cmd='git rev-parse --symbolic-full-name --verify HEAD@{upstream}'
-
-  # Gets the commit difference counts between local and remote.
-  ahead_and_behind_cmd='git rev-list --count --left-right HEAD...@{upstream}'
-
   # Ignore submodule status.
   zstyle -s ':prezto:module:git:status:ignore' submodules 'ignore_submodules'
-  if [[ -n "$ignore_submodules" ]]; then
-    status_cmd+=" --ignore-submodules=${ignore_submodules}"
-  fi
 
   # Format commit.
+  zstyle -s ':prezto:module:git:info:commit' format 'commit_format'
+  if [[ -n "$commit_format" ]]; then
     commit="$(git rev-parse HEAD 2> /dev/null)"
     if [[ -n "$commit" ]]; then
-    zstyle -s ':prezto:module:git:info:commit' format 'commit_format'
       zformat -f commit_formatted "$commit_format" "c:$commit"
     fi
+  fi
 
   # Format stashed.
-  if [[ -f "$(git-dir)/refs/stash" ]]; then
-    stashed="$(git stash list 2> /dev/null | wc -l | awk '{print $1}')"
   zstyle -s ':prezto:module:git:info:stashed' format 'stashed_format'
+  if [[ -n "$stashed_format" && -f "$(git-dir)/refs/stash" ]]; then
+    stashed="$(git stash list 2> /dev/null | wc -l | awk '{print $1}')"
+    if [[ -n "$stashed" ]]; then
       zformat -f stashed_formatted "$stashed_format" "S:$stashed"
     fi
+  fi
 
   # Format action.
+  zstyle -s ':prezto:module:git:info:action' format 'action_format'
+  if [[ -n "$action_format" ]]; then
     action="$(_git-action)"
     if [[ -n "$action" ]]; then
-    zstyle -s ':prezto:module:git:info:action' format 'action_format'
       zformat -f action_formatted "$action_format" "s:$action"
     fi
+  fi
 
-  # Get current status.
+  # Get the branch.
-  while IFS=$'\n' read line; do
+  branch="${$(git symbolic-ref HEAD 2> /dev/null)#refs/heads/}"
-    # Count added, deleted, modified, renamed, unmerged, untracked, dirty.
-    # T (type change) is undocumented, see http://git.io/FnpMGw.
-    # For a table of scenarii, see http://i.imgur.com/2YLu1.png.
-    [[ "$line" == ([ACDMT][\ MT]|[ACMT]D)\ * ]] && (( added++ ))
-    [[ "$line" == [\ ACMRT]D\ * ]] && (( deleted++ ))
-    [[ "$line" == ?[MT]\ * ]] && (( modified++ ))
-    [[ "$line" == R?\ * ]] && (( renamed++ ))
-    [[ "$line" == (AA|DD|U?|?U)\ * ]] && (( unmerged++ ))
-    [[ "$line" == \?\?\ * ]] && (( untracked++ ))
-    (( dirty++ ))
-  done < <(${(z)status_cmd} 2> /dev/null)
 
   # Format branch.
-  branch="${$(git symbolic-ref -q HEAD)##refs/heads/}"
-  if [[ -n "$branch" ]]; then
   zstyle -s ':prezto:module:git:info:branch' format 'branch_format'
+  if [[ -n "$branch" && -n "$branch_format" ]]; then
     zformat -f branch_formatted "$branch_format" "b:$branch"
+  fi
+
+  # Format position.
+  zstyle -s ':prezto:module:git:info:position' format 'position_format'
+  if [[ -z "$branch" && -n "$position_format" ]]; then
+    position="$(git describe --contains --all HEAD 2> /dev/null)"
+    if [[ -n "$position" ]]; then
+      zformat -f position_formatted "$position_format" "p:$position"
+    fi
+  fi
 
   # Format remote.
+  zstyle -s ':prezto:module:git:info:remote' format 'remote_format'
+  if [[ -n "$branch" && -n "$remote_format" ]]; then
+    # Gets the remote name.
+    remote_cmd='git rev-parse --symbolic-full-name --verify HEAD@{upstream}'
     remote="${$(${(z)remote_cmd} 2> /dev/null)##refs/remotes/}"
     if [[ -n "$remote" ]]; then
-      zstyle -s ':prezto:module:git:info:remote' format 'remote_format'
       zformat -f remote_formatted "$remote_format" "R:$remote"
+    fi
+  fi
+
+  zstyle -s ':prezto:module:git:info:ahead' format 'ahead_format'
+  zstyle -s ':prezto:module:git:info:behind' format 'behind_format'
+  if [[ -n "$branch" && ( -n "$ahead_format" || -n "$behind_format" ) ]]; then
+    # Gets the commit difference counts between local and remote.
+    ahead_and_behind_cmd='git rev-list --count --left-right HEAD...@{upstream}'
 
     # Get ahead and behind counts.
     ahead_and_behind="$(${(z)ahead_and_behind_cmd} 2> /dev/null)"
 
     # Format ahead.
+    if [[ -n "$ahead_format" ]]; then
       ahead="$ahead_and_behind[(w)1]"
-      if (( $ahead > 0 )); then
+      if (( ahead > 0 )); then
-        zstyle -s ':prezto:module:git:info:ahead' format 'ahead_format'
         zformat -f ahead_formatted "$ahead_format" "A:$ahead"
       fi
+    fi
 
     # Format behind.
+    if [[ -n "$behind_format" ]]; then
       behind="$ahead_and_behind[(w)2]"
-      if (( $behind > 0 )); then
+      if (( behind > 0 )); then
-        zstyle -s ':prezto:module:git:info:behind' format 'behind_format'
         zformat -f behind_formatted "$behind_format" "B:$behind"
       fi
     fi
-  else
-    # Format position.
-    position="$(git describe --contains --all HEAD 2> /dev/null)"
-    if [[ -n "$position" ]]; then
-      zstyle -s ':prezto:module:git:info:position' format 'position_format'
-      zformat -f position_formatted "$position_format" "p:$position"
-    fi
   fi
 
+  # Use porcelain status for easy parsing.
+  status_cmd="git status --porcelain --ignore-submodules=${ignore_submodules:-none}"
+
+  # Get current status.
+  while IFS=$'\n' read line; do
+    # Count added, deleted, modified, renamed, unmerged, untracked, dirty.
+    # T (type change) is undocumented, see http://git.io/FnpMGw.
+    # For a table of scenarii, see http://i.imgur.com/2YLu1.png.
+    [[ "$line" == ([ACDMT][\ MT]|[ACMT]D)\ * ]] && (( added++ ))
+    [[ "$line" == [\ ACMRT]D\ * ]] && (( deleted++ ))
+    [[ "$line" == ?[MT]\ * ]] && (( modified++ ))
+    [[ "$line" == R?\ * ]] && (( renamed++ ))
+    [[ "$line" == (AA|DD|U?|?U)\ * ]] && (( unmerged++ ))
+    [[ "$line" == \?\?\ * ]] && (( untracked++ ))
+    (( dirty++ ))
+  done < <(${(z)status_cmd} 2> /dev/null)
+
   # Format added.
-  if (( $added > 0 )); then
+  if (( added > 0 )); then
     zstyle -s ':prezto:module:git:info:added' format 'added_format'
     zformat -f added_formatted "$added_format" "a:$added_format"
   fi
 
   # Format deleted.
-  if (( $deleted > 0 )); then
+  if (( deleted > 0 )); then
     zstyle -s ':prezto:module:git:info:deleted' format 'deleted_format'
     zformat -f deleted_formatted "$deleted_format" "d:$deleted_format"
   fi
 
   # Format modified.
-  if (( $modified > 0 )); then
+  if (( modified > 0 )); then
     zstyle -s ':prezto:module:git:info:modified' format 'modified_format'
     zformat -f modified_formatted "$modified_format" "m:$modified"
   fi
 
   # Format renamed.
-  if (( $renamed > 0 )); then
+  if (( renamed > 0 )); then
     zstyle -s ':prezto:module:git:info:renamed' format 'renamed_format'
     zformat -f renamed_formatted "$renamed_format" "r:$renamed"
   fi
 
   # Format unmerged.
-  if (( $unmerged > 0 )); then
+  if (( unmerged > 0 )); then
     zstyle -s ':prezto:module:git:info:unmerged' format 'unmerged_format'
     zformat -f unmerged_formatted "$unmerged_format" "U:$unmerged"
   fi
 
   # Format untracked.
-  if (( $untracked > 0 )); then
+  if (( untracked > 0 )); then
     zstyle -s ':prezto:module:git:info:untracked' format 'untracked_format'
     zformat -f untracked_formatted "$untracked_format" "u:$untracked"
   fi
 
   # Format dirty and clean.
-  if (( $dirty > 0 )); then
+  if (( dirty > 0 )); then
     zstyle -s ':prezto:module:git:info:dirty' format 'dirty_format'
     zformat -f dirty_formatted "$dirty_format" "D:$dirty"
   else
@@ -342,21 +356,21 @@ function git-info {
   zstyle -a ':prezto:module:git:info:keys' format 'info_formats'
   for info_format in ${(k)info_formats}; do
     zformat -f REPLY "$info_formats[$info_format]" \
+      "a:$added_formatted" \
       "A:$ahead_formatted" \
       "B:$behind_formatted" \
-      "D:$dirty_formatted" \
-      "R:$remote_formatted" \
-      "S:$stashed_formatted" \
-      "U:$unmerged_formatted" \
-      "a:$added_formatted" \
       "b:$branch_formatted" \
       "C:$clean_formatted" \
       "c:$commit_formatted" \
       "d:$deleted_formatted" \
+      "D:$dirty_formatted" \
       "m:$modified_formatted" \
       "p:$position_formatted" \
+      "R:$remote_formatted" \
       "r:$renamed_formatted" \
       "s:$action_formatted" \
+      "S:$stashed_formatted" \
+      "U:$unmerged_formatted" \
       "u:$untracked_formatted"
     git_info[$info_format]="$REPLY"
   done