From b3b64a3fbdd6545610da51a36179dae164fae2a3 Mon Sep 17 00:00:00 2001
From: michaeldfallen <michaeldfallen@gmail.com>
Date: Thu, 5 Feb 2015 23:30:32 +0000
Subject: orchestrate async fetching

---
 git-base.sh | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 test.sh     | 38 ++++++++++++++++++++++++++++++++++++
 2 files changed, 103 insertions(+)
 create mode 100755 git-base.sh
 create mode 100755 test.sh

diff --git a/git-base.sh b/git-base.sh
new file mode 100755
index 0000000..d0f349d
--- /dev/null
+++ b/git-base.sh
@@ -0,0 +1,65 @@
+set -e
+
+debug_print() {
+  debug=$1
+  message=$2
+  if [[ $debug == "debug" ]]; then
+    echo $message
+  fi
+}
+
+dot_git() {
+  if [ -d .git ]; then
+    echo ".git"
+  else
+    echo "$(git rev-parse --git-dir)"
+  fi
+}
+
+git_root() {
+  if [ -d .git ]; then
+    echo "."
+  else
+    echo "$(git rev-parse --show-toplevel)"
+  fi
+}
+
+record_timestamp() {
+  touch "$(dot_git)/lastupdatetime"
+}
+
+timestamp() {
+  echo "$(stat -f%m "$(dot_git)/lastupdatetime")"
+}
+
+time_now() {
+  echo "$(date +%s)"
+}
+
+time_to_update() {
+  timesincelastupdate="$(($(time_now) - $(timestamp)))"
+  fiveminutes="$((5 * 60))"
+  if (( "$timesincelastupdate" > "$5minutes" )); then
+    # time to update return 0 (which is false)
+    return 0
+  else
+    # not time to update return 1 (which is true)
+    return 1
+  fi
+}
+
+fetch_async() {
+  debug="$1"
+  if time_to_update; then
+    debug_print $debug "Starting fetch"
+    fetch $debug &
+  else
+    debug_print $debug "Didn't fetch"
+  fi
+}
+
+fetch() {
+  debug="$1"
+  git fetch
+  debug_print $debug "Finished fetch"
+}
diff --git a/test.sh b/test.sh
new file mode 100755
index 0000000..bb8170d
--- /dev/null
+++ b/test.sh
@@ -0,0 +1,38 @@
+set -e
+
+scriptDir="$( dirname "$0" )"
+
+source "$scriptDir/git-base.sh"
+
+echo "\nTest: Root of this git repo"
+echo "$(git_root)"
+
+echo "\nTest: Location of .git"
+echo "$(dot_git)"
+
+echo "\nTest: Record the timestamp"
+record_timestamp
+echo "Timestamp = $(timestamp)"
+echo "Time now = $(time_now)"
+
+echo "\nTest: Time to update when just recorded"
+if time_to_update; then
+  echo "time to update"
+else
+  echo "not time yet"
+fi
+
+echo "\nTest: Don't fetch if it's not time to update"
+fetch_async "debug"
+
+echo "\nTest: Time to update when timestamp 5 mins ago"
+touch -A "-010000" "$(dot_git)/lastupdatetime"
+if time_to_update; then
+  echo "time to update"
+else
+  echo "not time yet"
+fi
+
+echo "\nTest: Do a non-blocking git fetch"
+fetch_async "debug"
+echo "Did I block?"
-- 
cgit v1.2.3