initial commit

README.md

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+# Watcher
+
+This is a simple script with watch for file modification and execute a
+command when this occurs.
+
+Examples:
+
+    watch ./gen fic1 fic2 dir1
+    watch "echo 'This file changed:' " dir1 dir2

watch

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+#!/usr/bin/env zsh
+
+error(){print -- $* >&2; exit 1}
+
+(($#<2)) && error "usage: ${0:t} [once] cmd dirs..."
+
+ONCE=0
+[[ $1 = "once" ]] && { ONCE=1; shift }
+
+(($#<2)) && error "usage: ${0:t} [once] cmd dirs..."
+
+cmd="$1"
+shift
+
+typeset -a listDir
+listDir=( $@ )
+
+isRecentlyModified() {
+    local fic="$1"
+    local mtime=0
+    currenttime=$(date +"%s")
+    case $(uname) in
+        Darwin) mtime=$(stat -f %m $fic);;
+        Linux) mtime=$(stat --printf %Y $fic);;
+        *) mtime=$(stat --printf %Y $fic);;
+    esac
+    (( $currenttime - $mtime  < 2 ))
+}
+
+checkfile=".last_watched"
+((ONCE == 0)) && \
+    [[ -e $checkfile ]] && \
+    isRecentlyModified $checkfile && \
+    error "Wait at least 2 second if you killed the process"
+
+execIfChanged() {
+    isRecentlyModified $1 && { print -- "$cmd $1"; eval "$cmd $1"}
+}
+
+typeset -A listFic
+while true; do
+    listFic=()
+    for d in $listDir; do
+        if [[ -d $d ]]; then
+            for fic in $d/**/*(.); do
+                execIfChanged $fic
+            done
+        else
+            execIfChanged $d
+        fi
+    done
+    ((ONCE == 1)) && break
+    touch $checkfile
+    sleep 2
+done