Checking availability of commands

2 files changed, 15 insertions, 0 deletions

diff --git a/lib/hydra/misc b/lib/hydra/misc
index 5b34214..98d16ac 100644
--- a/lib/hydra/misc
+++ b/lib/hydra/misc
@@ -45,3 +45,15 @@ function hydra_truncate_database {
     mysql $1 -e "drop database $1; create database $1;"
   fi
 }
+
+# Check for a command
+function hydra_check_command {
+  if [ -z "$1" ]; then
+    return
+  fi
+
+  if ! which $1 &> /dev/null; then
+    echo "Please install a package for $1 to run this action"
+    exit 1
+  fi
+}
diff --git a/share/hydra/mass b/share/hydra/mass
index 3aebd22..9bd83f9 100755
--- a/share/hydra/mass
+++ b/share/hydra/mass
@@ -5,6 +5,7 @@
 
 # Issue commands with pssh
 function mass_pssh {
+  hydra_check_command parallel-ssh
   parallel-ssh -t 120 -P -p 4 -h $TMPWORK sudo $COMMAND
 }
 
@@ -18,11 +19,13 @@ function mass_loop {
 
 # Issue commands with dish
 function mass_dish {
+  hydra_check_command dish
   dish -f -p /dev/null -e "sudo $COMMAND" -g $TMPWORK
 }
 
 # Issue commands with mussh
 function mass_mussh {
+  hydra_check_command mussh
   mussh -H $TMPWORK -c "sudo $COMMAND"
 }