From 97036aeae73cc2a63219c7b792ab5f18c7d98cd1 Mon Sep 17 00:00:00 2001
From: Trygve Laugstøl <trygvis@inamo.no>
Date: Fri, 1 Feb 2013 09:28:18 +0100
Subject: libexec/app-resolver-maven: Better argument checking. lib/common:
 Starting a way to have a common usage/help semantics.

---
 NOTES.tmp                  | 11 +++++++++++
 bin/app-init               | 19 +++++++++----------
 lib/common                 | 15 +++++++++++++++
 libexec/app-resolver-maven | 31 +++++++++++++------------------
 4 files changed, 48 insertions(+), 28 deletions(-)

diff --git a/NOTES.tmp b/NOTES.tmp
index 5798e61..7ecab9c 100644
--- a/NOTES.tmp
+++ b/NOTES.tmp
@@ -19,3 +19,14 @@ app list - lists all applications available under the specified directory
 TODO:
 * tab => spaces
 * camelCase => snake_case
+* Figure out the versions of bash that's available in the different
+  major operating systems:
+  * Debian
+  * Ubuntu
+  * RedHat
+  * SLES/OpenSuse
+  * Cygwin
+* Document patterns for parsing command line arguments
+* Support sending in config to an app when running init. Has to be
+  installed before running the hooks, useful to controlling
+  environment through config.
diff --git a/bin/app-init b/bin/app-init
index 018b210..ba97ebd 100755
--- a/bin/app-init
+++ b/bin/app-init
@@ -8,14 +8,8 @@ APPSH_HOME=$(cd $(dirname "$0")/.. && pwd)
 . $APPSH_HOME/lib/common
 # HEADER END
 
-usage() {
-  echo "usage: $0 -d dir <resolver> <resolver args>"
-  exit 1
-}
-
-fatal() {
-  echo "$0: $@"
-  exit 1
+usage_inner() {
+  echo "usage: $usage_app -d dir <resolver> <resolver args>"
 }
 
 while getopts "d:" opt
@@ -46,8 +40,6 @@ then
   fatal "Already initialized: $dir" 2>&1
 fi
 
-# TODO: install a trap handler and rm -rf "$dir"
-
 resolver=`grep_path "/app-resolver-$resolver_name$" "$PATH" | head -n 1`
 
 if [ -z "$resolver" ]
@@ -57,6 +49,11 @@ then
 fi
 
 mkdir -p -- "$dir" "$dir/.app"
+
+ok=no
+clean_dir=`cd "$dir">/dev/null; pwd`
+trap '[[ $ok == yes ]] || rm -rf "$clean_dir"' EXIT
+
 cd "$dir"
 
 app-conf set app.resolver "$resolver_name"
@@ -77,3 +74,5 @@ echo "Resolved version to $version"
 "$resolver" download-version -v "$version" -f .app/latest.zip
 
 app-install-file -v "$version" -f .app/latest.zip
+
+ok=yes
diff --git a/lib/common b/lib/common
index e90f77b..63f712a 100755
--- a/lib/common
+++ b/lib/common
@@ -40,6 +40,21 @@ assert_is_app() {
   fi
 }
 
+usage() {
+  message=${1-}
+
+  if [[ $message != "" ]]
+  then
+    echo $message
+  fi
+
+  if [ "`declare -f usage_inner >/dev/null; echo $?`" = 0 ]
+  then
+    usage_inner >&2
+  fi
+  exit 1
+}
+
 debug() {
   [[ $echo_debug == no ]] || echo "D: $usage_app: $@" 2>&1
 }
diff --git a/libexec/app-resolver-maven b/libexec/app-resolver-maven
index a3b367c..81e85ab 100755
--- a/libexec/app-resolver-maven
+++ b/libexec/app-resolver-maven
@@ -8,18 +8,10 @@ APPSH_HOME=$(cd $(dirname "$0")/.. && pwd)
 . $APPSH_HOME/lib/common
 # HEADER END
 
-usage() {
-  message=${1-}
-
-  if [ ! -z "$message" ]
-  then
-    echo $message
-  fi
-
-  echo "usage: $subapp init -r <repo> <maven url>"
-  echo "usage: $subapp resolve-version"
-  echo "usage: $subapp download-version -v <version> -f <download target>"
-  exit 1
+usage_inner() {
+  echo "usage: $usage_app init -r <repo> <maven url>"
+  echo "usage: $usage_app resolve-version"
+  echo "usage: $usage_app download-version -v <version> -f <download target>"
 }
 
 slash() {
@@ -201,22 +193,25 @@ init() {
     esac
   done
 
-  x=`echo $1 | tr ":" " "`; set -- $x
-  group_id=$1
-  artifact_id=$2
-  version=$3
+  local coordinates=${1-}
+  x=${coordinates}
+  x=${x//:/ }
+  set -- $x
 
-  if [ -z "$group_id" -o -z "$artifact_id" -o -z "$version" ]
+  if [[ $# != 3 || $1 == "" || $2 == "" || $3 == "" ]]
   then
     usage "Invalid Maven coordinates: $coordinates"
   fi
 
+  group_id=$1
+  artifact_id=$2
+  version=$3
+
   app-conf set maven.group_id "$group_id"
   app-conf set maven.artifact_id "$artifact_id"
   app-conf set maven.version "$version"
 }
 
-subapp="$0";
 command="$1"; shift
 
 case "$command" in
-- 
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