fix: append trailing newline to .tool-versions files when missing (#1310

)

If a .tool-versions file did not end with a newline new tools and
versions would get appended to the same line rather than properly
added on a new line in the file

Fixes #1299

lib/functions/versions.bash

@@ -64,6 +64,10 @@ version_command() {
     sed -i.bak -e "s|^$plugin_name .*$|$plugin_name ${resolved_versions[*]}|" "$file"
     rm -f "$file".bak
   else
+    # Add a trailing newline at the end of the file if missing
+    [[ -n "$(tail -c1 "$file")" && -f "$file" ]] && printf '\n' >>"$file"
+
+    # Add a new version line to the end of the file
     printf "%s %s\\n" "$plugin_name" "${resolved_versions[*]}" >>"$file"
   fi
 }

test/version_commands.bats

@@ -126,6 +126,22 @@ teardown() {
   [ "$(cat $PROJECT_DIR/.tool-versions)" = "dummy 1.1.0" ]
 }
 
+@test "local should append trailing newline before appending new version when missing" {
+  echo -n 'foobar 1.0.0' >>$PROJECT_DIR/.tool-versions
+
+  run asdf local "dummy" "1.1.0"
+  [ "$status" -eq 0 ]
+  [ "$(cat $PROJECT_DIR/.tool-versions)" = $'foobar 1.0.0\ndummy 1.1.0' ]
+}
+
+@test "local should not append trailing newline before appending new version when one present" {
+  echo 'foobar 1.0.0' >>$PROJECT_DIR/.tool-versions
+
+  run asdf local "dummy" "1.1.0"
+  [ "$status" -eq 0 ]
+  [ "$(cat $PROJECT_DIR/.tool-versions)" = $'foobar 1.0.0\ndummy 1.1.0' ]
+}
+
 @test "local should fail to set a path:dir if dir does not exists " {
   run asdf local "dummy" "path:$PROJECT_DIR/local"
   [ "$output" = "version path:$PROJECT_DIR/local is not installed for dummy" ]
@@ -236,6 +252,22 @@ teardown() {
   [ "$(cat $HOME/.tool-versions)" = "dummy 1.1.0" ]
 }
 
+@test "global should append trailing newline before appending new version when missing" {
+  echo -n 'foobar 1.0.0' >>$HOME/.tool-versions
+
+  run asdf global "dummy" "1.1.0"
+  [ "$status" -eq 0 ]
+  [ "$(cat $HOME/.tool-versions)" = $'foobar 1.0.0\ndummy 1.1.0' ]
+}
+
+@test "global should not append trailing newline before appending new version when one present" {
+  echo 'foobar 1.0.0' >>$HOME/.tool-versions
+
+  run asdf global "dummy" "1.1.0"
+  [ "$status" -eq 0 ]
+  [ "$(cat $HOME/.tool-versions)" = $'foobar 1.0.0\ndummy 1.1.0' ]
+}
+
 @test "global should fail to set a path:dir if dir does not exists " {
   run asdf global "dummy" "path:$PROJECT_DIR/local"
   [ "$output" = "version path:$PROJECT_DIR/local is not installed for dummy" ]