a2a83be982bad4568c8311474f02de551d0c9aaa

 1diff --git a/themes/smt.zsh-theme b/themes/smt.zsh-theme
 2index f2b0526b761ac35a727c71e36bababe90c66c4cc..7f54472c6b55407bde66ac1ff38ce02d9860e322 100644
 3--- a/themes/smt.zsh-theme
 4+++ b/themes/smt.zsh-theme
 5@@ -21,9 +21,9 @@ ZSH_THEME_GIT_PROMPT_SHA_BEFORE="➤ %{$fg_bold[yellow]%}"
 6 ZSH_THEME_GIT_PROMPT_SHA_AFTER="%{$reset_color%}"
 7 
 8 function prompt_char() {
 9-  git branch >/dev/null 2>/dev/null && echo "%{$fg[green]%}±%{$reset_color%}" && return
10-  hg root >/dev/null 2>/dev/null && echo "%{$fg_bold[red]%}☿%{$reset_color%}" && return
11-  darcs show repo >/dev/null 2>/dev/null && echo "%{$fg_bold[green]%}❉%{$reset_color%}" && return
12+  command git branch &>/dev/null && echo "%{$fg[green]%}±%{$reset_color%}" && return
13+  command hg root &>/dev/null && echo "%{$fg_bold[red]%}☿%{$reset_color%}" && return
14+  command darcs show repo &>/dev/null && echo "%{$fg_bold[green]%}❉%{$reset_color%}" && return
15   echo "%{$fg[cyan]%}◯%{$reset_color%}"
16 }
17 
18@@ -36,47 +36,44 @@ ZSH_THEME_GIT_TIME_SINCE_COMMIT_NEUTRAL="%{$fg[cyan]%}"
19 # Determine the time since last commit. If branch is clean,
20 # use a neutral color, otherwise colors will vary according to time.
21 function git_time_since_commit() {
22-    if git rev-parse --git-dir > /dev/null 2>&1; then
23-        # Only proceed if there is actually a commit.
24-        if [[ $(git log 2>&1 > /dev/null | grep -c "^fatal: bad default revision") == 0 ]]; then
25-            # Get the last commit.
26-            last_commit=`git log --pretty=format:'%at' -1 2> /dev/null`
27-            now=`date +%s`
28-            seconds_since_last_commit=$((now-last_commit))
29+    local COLOR MINUTES HOURS DAYS SUB_HOURS SUB_MINUTES
30+    local last_commit seconds_since_last_commit
31 
32-            # Totals
33-            MINUTES=$((seconds_since_last_commit / 60))
34-            HOURS=$((seconds_since_last_commit/3600))
35+    # Only proceed if there is actually a commit
36+    if ! last_commit=$(command git log --pretty=format:'%at' -1 2>/dev/null); then
37+        echo "[$ZSH_THEME_GIT_TIME_SINCE_COMMIT_NEUTRAL~%{$reset_color%}]"
38+        return
39+    fi
40 
41-            # Sub-hours and sub-minutes
42-            DAYS=$((seconds_since_last_commit / 86400))
43-            SUB_HOURS=$((HOURS % 24))
44-            SUB_MINUTES=$((MINUTES % 60))
45+    # Totals
46+    seconds_since_last_commit=$(( EPOCHSECONDS - last_commit ))
47+    MINUTES=$(( seconds_since_last_commit / 60 ))
48+    HOURS=$(( MINUTES / 60 ))
49 
50-            if [[ -n $(git status -s 2> /dev/null) ]]; then
51-                if [ "$MINUTES" -gt 30 ]; then
52-                    COLOR="$ZSH_THEME_GIT_TIME_SINCE_COMMIT_LONG"
53-                elif [ "$MINUTES" -gt 10 ]; then
54-                    COLOR="$ZSH_THEME_GIT_TIME_SHORT_COMMIT_MEDIUM"
55-                else
56-                    COLOR="$ZSH_THEME_GIT_TIME_SINCE_COMMIT_SHORT"
57-                fi
58-            else
59-                COLOR="$ZSH_THEME_GIT_TIME_SINCE_COMMIT_NEUTRAL"
60-            fi
61+    # Sub-hours and sub-minutes
62+    DAYS=$(( HOURS / 24 ))
63+    SUB_HOURS=$(( HOURS % 24 ))
64+    SUB_MINUTES=$(( MINUTES % 60 ))
65 
66-            if [ "$HOURS" -gt 24 ]; then
67-                echo "[$COLOR${DAYS}d${SUB_HOURS}h${SUB_MINUTES}m%{$reset_color%}]"
68-            elif [ "$MINUTES" -gt 60 ]; then
69-                echo "[$COLOR${HOURS}h${SUB_MINUTES}m%{$reset_color%}]"
70-            else
71-                echo "[$COLOR${MINUTES}m%{$reset_color%}]"
72-            fi
73+    if [[ -z "$(command git status -s 2>/dev/null)" ]]; then
74+        COLOR="$ZSH_THEME_GIT_TIME_SINCE_COMMIT_NEUTRAL"
75+    else
76+        if [[ "$MINUTES" -gt 30 ]]; then
77+            COLOR="$ZSH_THEME_GIT_TIME_SINCE_COMMIT_LONG"
78+        elif [[ "$MINUTES" -gt 10 ]]; then
79+            COLOR="$ZSH_THEME_GIT_TIME_SHORT_COMMIT_MEDIUM"
80         else
81-            COLOR="$ZSH_THEME_GIT_TIME_SINCE_COMMIT_NEUTRAL"
82-            echo "[$COLOR~]"
83+            COLOR="$ZSH_THEME_GIT_TIME_SINCE_COMMIT_SHORT"
84         fi
85     fi
86+
87+    if [[ "$HOURS" -gt 24 ]]; then
88+        echo "[${COLOR}${DAYS}d${SUB_HOURS}h${SUB_MINUTES}m%{$reset_color%}]"
89+    elif [[ "$MINUTES" -gt 60 ]]; then
90+        echo "[${COLOR}${HOURS}h${SUB_MINUTES}m%{$reset_color%}]"
91+    else
92+        echo "[${COLOR}${MINUTES}m%{$reset_color%}]"
93+    fi
94 }
95 
96 PROMPT='