Install and use driftctl on new dctlenv installation

libexec/dctlenv-use

@@ -3,8 +3,6 @@ set -uo pipefail
 
 [ "$#" -gt 1 ] && log_error "Need 1 version instead of $#" 'usage: dctlenv use [<version>]'
 
-[ -d "$DCTLENV_ROOT/versions" ] || log_error 'No versions of driftctl installed. Please install one with: dctlenv install [<version>]'
-
 version_requested="${1:-""}"
 [ -n "$version_requested" ] || log_error 'Version is not specified' 'usage: dctlenv use [<version>]'
 
@@ -13,7 +11,7 @@ if [[ $version_requested == "latest" ]]; then
 fi
 
 log_debug "Searching $DCTLENV_ROOT/versions for version matching $version_requested"
-version="$(\find "$DCTLENV_ROOT/versions" -type d -exec basename {} \; \
+version="$(\find "$DCTLENV_ROOT/versions" -type d -exec basename {} \; 2>/dev/null \
   | tail -n +2 \
   | sort -t'.' -k 1nr,1 -k 2nr,2 -k 3nr,3 \
   | grep -e "$version_requested" \

test/dctlenv-use.bats

@@ -27,13 +27,6 @@ setup() {
   assert_output 'usage: dctlenv use [<version>]'
 }
 
-@test "dctlenv use [<version>]: prints an error message if there is no version installed" {
-  run dctlenv use 0.3.1
-
-  assert_failure
-  assert_output 'No versions of driftctl installed. Please install one with: dctlenv install [<version>]'
-}
-
 @test "dctlenv use [<version>]: prints an error message if we don't specified a version to use" {
   mkdir -p "$DCTLENV_TMPDIR/versions/0.3.1"
 
@@ -134,6 +127,25 @@ Switching completed
 OUT
 }
 
+@test "dctlenv use [<version>]: can install and use driftctl for a new dctlenv utilisation" {
+  dctlenv-install() {
+    mkdir -p "$DCTLENV_TMPDIR/versions/0.3.1"
+    touch "$DCTLENV_TMPDIR/versions/0.3.1/driftctl"
+    chmod +x $DCTLENV_TMPDIR/versions/0.3.1/driftctl
+    exit 0
+  }; export -f dctlenv-install;
+  driftctl() { exit 0; }; export -f driftctl;
+
+  run dctlenv use latest
+
+  assert_success
+  assert_output <<OUT
+No installed versions of driftctl matched '0.3.1', let's install it
+Switching version to v0.3.1
+Switching completed
+OUT
+}
+
 teardown() {
   rm -rf "$DCTLENV_TMPDIR"
 }