fix dry-run crash when parent directory does not exist yet, add rake and rcm fallback to examples

4 files changed, 17 insertions, 4 deletions

diff --git a/examples/gem/Gemfile b/examples/gem/Gemfile
index b1f79ad..7e62d34 100644
--- a/examples/gem/Gemfile
+++ b/examples/gem/Gemfile
@@ -2,3 +2,4 @@ source 'https://rubygems.org'
 
 # Point at the local rcm checkout; change to gem 'rcm' once published.
 gem 'rcm', path: '../../'
+gem 'rake'
diff --git a/examples/plain_ruby/config.rb b/examples/plain_ruby/config.rb
index f49bd01..c730c05 100755
--- a/examples/plain_ruby/config.rb
+++ b/examples/plain_ruby/config.rb
@@ -8,7 +8,11 @@
 #
 # Requires rcm to be installed as a gem, or adjust the path below:
 #   require_relative '../../lib/dsl'
-require 'rcm'
+begin
+  require 'rcm'
+rescue LoadError
+  require_relative '../../lib/dsl'
+end
 
 configure do
   # Write a simple text file with static content.
diff --git a/examples/rake/Gemfile b/examples/rake/Gemfile
index b1f79ad..7e62d34 100644
--- a/examples/rake/Gemfile
+++ b/examples/rake/Gemfile
@@ -2,3 +2,4 @@ source 'https://rubygems.org'
 
 # Point at the local rcm checkout; change to gem 'rcm' once published.
 gem 'rcm', path: '../../'
+gem 'rake'
diff --git a/lib/dslkeywords/file.rb b/lib/dslkeywords/file.rb
index 9a44f72..927054a 100644
--- a/lib/dslkeywords/file.rb
+++ b/lib/dslkeywords/file.rb
@@ -211,6 +211,14 @@ module RCM
     end
 
     def write!(text)
+      # In dry-run mode skip all filesystem access and just report what would
+      # happen — the parent directory may not exist yet so we cannot write the
+      # temporary file at all.
+      if option :dry
+        info "Writing file #{@file_path} - dry run!"
+        return
+      end
+
       tmp_path = "#{@file_path}.rcmtmp"
       ::File.write(tmp_path, text)
 
@@ -223,9 +231,8 @@ module RCM
         backup!(@file_path, checksum) # File changed, backup!
       end
 
-      do? "Writing file #{@file_path}" do
-        ::File.rename(tmp_path, @file_path)
-      end
+      info "Writing file #{@file_path}"
+      ::File.rename(tmp_path, @file_path)
       ::File.delete(tmp_path) if ::File.file?(tmp_path)
     end
   end