diff --git a/lib/completely/commands/base.rb b/lib/completely/commands/base.rb
index a17fd45..69f1139 100644
--- a/lib/completely/commands/base.rb
+++ b/lib/completely/commands/base.rb
@@ -5,15 +5,19 @@ module Commands
     class Base < MisterBin::Command
 
       class << self
-        def config_path_usage
-          param "CONFIG_PATH", "Path to the YAML configuration file [default: completely.yaml]"
+        def param_config_path
+          param "CONFIG_PATH", "Path to the YAML configuration file [default: completely.yaml]\nCan also be set by an environment variable"
         end
 
-        def function_usage
+        def option_function
           option "-f --function NAME", "Modify the name of the function in the generated script"
         end
 
-        def debug_usage
+        def environment_config_path
+          environment "COMPLETELY_CONFIG_PATH", "Path to a completely configuration file [default: completely.yaml]"
+        end
+
+        def environment_debug
           environment "COMPLETELY_DEBUG", "It not empty, the generated script will include an additional debugging snippet that outputs the compline and current word to a text file when a completion is requested"
         end
       end
@@ -29,7 +33,15 @@ def completions
       end
 
       def config_path
-        args['CONFIG_PATH'] || 'completely.yaml'
+        @config_path ||= args['CONFIG_PATH'] || ENV['COMPLETELY_CONFIG_PATH'] || 'completely.yaml'
+      end
+
+      def script_path
+        @script_path ||= args['SCRIPT_PATH'] || ENV['COMPLETELY_SCRIPT_PATH'] || "#{config_basename}.bash"
+      end
+
+      def config_basename
+        File.basename config_path, File.extname(config_path)
       end
 
       def syntax_warning
diff --git a/lib/completely/commands/generate.rb b/lib/completely/commands/generate.rb
index 5bb49ac..088f9cd 100644
--- a/lib/completely/commands/generate.rb
+++ b/lib/completely/commands/generate.rb
@@ -5,21 +5,24 @@ module Commands
     class Generate < Base
       help "Generate the bash completion script to a file"
 
-      usage "completely generate [CONFIG_PATH OUTPUT_PATH --function NAME --wrap NAME]"
+      usage "completely generate [CONFIG_PATH SCRIPT_PATH --function NAME --wrap NAME]"
       usage "completely generate (-h|--help)"
 
-      function_usage
+      option_function
       option "-w --wrap NAME", "Wrap the completion script inside a function that echos the script. This is useful if you wish to embed it directly in your script"
 
-      config_path_usage
-      param "OUTPUT_PATH", "Path to the output bash script [default: completely.bash]"
-      debug_usage
+      param_config_path
+      param "SCRIPT_PATH", "Path to the output bash script. When not provided, the name of the input file will be used with a .bash extension\nCan also be set by an environment variable"
+
+      environment_config_path
+      environment "COMPLETELY_SCRIPT_PATH", "Path to the output bash script"
+      environment_debug
 
       def run
         wrap = args['--wrap']
         output = wrap ? wrapper_function(wrap) : script
-        File.write output_path, output
-        say "Saved !txtpur!#{output_path}"
+        File.write script_path, output
+        say "Saved !txtpur!#{script_path}"
         syntax_warning unless completions.valid?
       end
 
@@ -29,10 +32,6 @@ def wrapper_function(wrapper_name)
         completions.wrapper_function wrapper_name
       end
 
-      def output_path
-        @output_path ||= args['OUTPUT_PATH'] || "completely.bash"
-      end
-
     end
   end
 end
diff --git a/lib/completely/commands/init.rb b/lib/completely/commands/init.rb
index 277dde5..4116ab2 100644
--- a/lib/completely/commands/init.rb
+++ b/lib/completely/commands/init.rb
@@ -8,7 +8,8 @@ class Init < Base
       usage "completely init [CONFIG_PATH]"
       usage "completely init (-h|--help)"
 
-      config_path_usage
+      param_config_path
+      environment_config_path
 
       def run
         if File.exist? config_path
diff --git a/lib/completely/commands/preview.rb b/lib/completely/commands/preview.rb
index 127f453..f4b0123 100644
--- a/lib/completely/commands/preview.rb
+++ b/lib/completely/commands/preview.rb
@@ -8,9 +8,10 @@ class Preview < Base
       usage "completely preview [CONFIG_PATH --function NAME]"
       usage "completely preview (-h|--help)"
 
-      function_usage
-      config_path_usage
-      debug_usage
+      option_function
+      param_config_path
+      environment_config_path
+      environment_debug
 
       def run
         puts script
diff --git a/lib/completely/commands/test.rb b/lib/completely/commands/test.rb
index 98c8fbc..26ed8f6 100644
--- a/lib/completely/commands/test.rb
+++ b/lib/completely/commands/test.rb
@@ -18,10 +18,10 @@ class Test < Base
 
       param "COMPLINE", "The command to test completions for. This will be handled as if a TAB was pressed immediately at the end of it, so the last word is considered the active cursor. If you wish to complete for the next word instead, end your command with a space."
 
-      environment "COMPLETELY_CONFIG_PATH", "Path to a completely configuration file [default: completely.yaml]"
+      environment_config_path
       environment "COMPLETELY_SCRIPT_PATH", "Path to a completions script. When set, this script will be tested instead of the completely configuration file"
       environment "COMPLETELY_SCRIPT_FUNCTION", "The main completion function to call when using a custom script. If not set, the basename of the script path will be used, prefixed by an underscore"
-      debug_usage
+      environment_debug
 
       example %q[completely test "mygit pu"]
       example %q[completely test "mygit pull "]
diff --git a/lib/completely/templates/template.erb b/lib/completely/templates/template.erb
index 4e0accf..f8c6ec2 100644
--- a/lib/completely/templates/template.erb
+++ b/lib/completely/templates/template.erb
@@ -7,6 +7,7 @@
 <%= function_name %>() {
   local cur compline
   _init_completion -s || return
+
   cur=${COMP_WORDS[COMP_CWORD]}
   compline="${COMP_WORDS[@]:1:$COMP_CWORD-1}"
 
@@ -20,7 +21,10 @@
   case "$compline" in
 % patterns.each do |pattern|
 % next if pattern.empty?
-    <%= pattern.case_string %>) COMPREPLY=($(compgen <%= pattern.compgen %> -- "$cur")) ;;
+    <%= pattern.case_string %>)
+      COMPREPLY=($(compgen <%= pattern.compgen %> -- "$cur"))
+      ;;
+
 % end
   esac
 } &&
diff --git a/spec/approvals/cli/generate/custom-path-env b/spec/approvals/cli/generate/custom-path-env
new file mode 100644
index 0000000..050d17b
--- /dev/null
+++ b/spec/approvals/cli/generate/custom-path-env
@@ -0,0 +1 @@
+Saved hello.bash
diff --git a/spec/approvals/cli/generate/custom-path-env2 b/spec/approvals/cli/generate/custom-path-env2
new file mode 100644
index 0000000..2acdbda
--- /dev/null
+++ b/spec/approvals/cli/generate/custom-path-env2
@@ -0,0 +1 @@
+Saved spec/tmp/tada.bash
diff --git a/spec/approvals/cli/generate/help b/spec/approvals/cli/generate/help
index 472b766..ccd8ac2 100644
--- a/spec/approvals/cli/generate/help
+++ b/spec/approvals/cli/generate/help
@@ -1,7 +1,7 @@
 Generate the bash completion script to a file
 
 Usage:
-  completely generate [CONFIG_PATH OUTPUT_PATH --function NAME --wrap NAME]
+  completely generate [CONFIG_PATH SCRIPT_PATH --function NAME --wrap NAME]
   completely generate (-h|--help)
 
 Options:
@@ -18,11 +18,20 @@ Options:
 Parameters:
   CONFIG_PATH
     Path to the YAML configuration file [default: completely.yaml]
+    Can also be set by an environment variable
 
-  OUTPUT_PATH
-    Path to the output bash script [default: completely.bash]
+  SCRIPT_PATH
+    Path to the output bash script. When not provided, the name of the input
+    file will be used with a .bash extension
+    Can also be set by an environment variable
 
 Environment Variables:
+  COMPLETELY_CONFIG_PATH
+    Path to a completely configuration file [default: completely.yaml]
+
+  COMPLETELY_SCRIPT_PATH
+    Path to the output bash script
+
   COMPLETELY_DEBUG
     It not empty, the generated script will include an additional debugging
     snippet that outputs the compline and current word to a text file when a
diff --git a/spec/approvals/cli/generated-script b/spec/approvals/cli/generated-script
index 9949d20..5b880e0 100644
--- a/spec/approvals/cli/generated-script
+++ b/spec/approvals/cli/generated-script
@@ -7,14 +7,27 @@
 _mygit_completions() {
   local cur compline
   _init_completion -s || return
+
   cur=${COMP_WORDS[COMP_CWORD]}
   compline="${COMP_WORDS[@]:1:$COMP_CWORD-1}"
 
   case "$compline" in
-    'status'*) COMPREPLY=($(compgen -W "--help --verbose --branch $(git branch 2> /dev/null)" -- "$cur")) ;;
-    'commit'*) COMPREPLY=($(compgen -A file -W "--help --message --all -a --quiet -q" -- "$cur")) ;;
-    'init'*) COMPREPLY=($(compgen -A directory -W "--bare" -- "$cur")) ;;
-    *) COMPREPLY=($(compgen -W "--help --version status init commit" -- "$cur")) ;;
+    'status'*)
+      COMPREPLY=($(compgen -W "--help --verbose --branch $(git branch 2> /dev/null)" -- "$cur"))
+      ;;
+
+    'commit'*)
+      COMPREPLY=($(compgen -A file -W "--help --message --all -a --quiet -q" -- "$cur"))
+      ;;
+
+    'init'*)
+      COMPREPLY=($(compgen -A directory -W "--bare" -- "$cur"))
+      ;;
+
+    *)
+      COMPREPLY=($(compgen -W "--help --version status init commit" -- "$cur"))
+      ;;
+
   esac
 } &&
 complete -F _mygit_completions mygit
diff --git a/spec/approvals/cli/generated-script-alt b/spec/approvals/cli/generated-script-alt
index 8f83859..1a4866b 100644
--- a/spec/approvals/cli/generated-script-alt
+++ b/spec/approvals/cli/generated-script-alt
@@ -7,14 +7,27 @@
 _mycomps() {
   local cur compline
   _init_completion -s || return
+
   cur=${COMP_WORDS[COMP_CWORD]}
   compline="${COMP_WORDS[@]:1:$COMP_CWORD-1}"
 
   case "$compline" in
-    'status'*) COMPREPLY=($(compgen -W "--help --verbose --branch $(git branch 2> /dev/null)" -- "$cur")) ;;
-    'commit'*) COMPREPLY=($(compgen -A file -W "--help --message --all -a --quiet -q" -- "$cur")) ;;
-    'init'*) COMPREPLY=($(compgen -A directory -W "--bare" -- "$cur")) ;;
-    *) COMPREPLY=($(compgen -W "--help --version status init commit" -- "$cur")) ;;
+    'status'*)
+      COMPREPLY=($(compgen -W "--help --verbose --branch $(git branch 2> /dev/null)" -- "$cur"))
+      ;;
+
+    'commit'*)
+      COMPREPLY=($(compgen -A file -W "--help --message --all -a --quiet -q" -- "$cur"))
+      ;;
+
+    'init'*)
+      COMPREPLY=($(compgen -A directory -W "--bare" -- "$cur"))
+      ;;
+
+    *)
+      COMPREPLY=($(compgen -W "--help --version status init commit" -- "$cur"))
+      ;;
+
   esac
 } &&
 complete -F _mycomps mygit
diff --git a/spec/approvals/cli/generated-wrapped-script b/spec/approvals/cli/generated-wrapped-script
index 87db078..ffd1c2a 100644
--- a/spec/approvals/cli/generated-wrapped-script
+++ b/spec/approvals/cli/generated-wrapped-script
@@ -8,14 +8,27 @@ give_comps() {
   echo $'_mygit_completions() {'
   echo $'  local cur compline'
   echo $'  _init_completion -s || return'
+  echo $''
   echo $'  cur=${COMP_WORDS[COMP_CWORD]}'
   echo $'  compline="${COMP_WORDS[@]:1:$COMP_CWORD-1}"'
   echo $''
   echo $'  case "$compline" in'
-  echo $'    \'status\'*) COMPREPLY=($(compgen -W "--help --verbose --branch $(git branch 2> /dev/null)" -- "$cur")) ;;'
-  echo $'    \'commit\'*) COMPREPLY=($(compgen -A file -W "--help --message --all -a --quiet -q" -- "$cur")) ;;'
-  echo $'    \'init\'*) COMPREPLY=($(compgen -A directory -W "--bare" -- "$cur")) ;;'
-  echo $'    *) COMPREPLY=($(compgen -W "--help --version status init commit" -- "$cur")) ;;'
+  echo $'    \'status\'*)'
+  echo $'      COMPREPLY=($(compgen -W "--help --verbose --branch $(git branch 2> /dev/null)" -- "$cur"))'
+  echo $'      ;;'
+  echo $''
+  echo $'    \'commit\'*)'
+  echo $'      COMPREPLY=($(compgen -A file -W "--help --message --all -a --quiet -q" -- "$cur"))'
+  echo $'      ;;'
+  echo $''
+  echo $'    \'init\'*)'
+  echo $'      COMPREPLY=($(compgen -A directory -W "--bare" -- "$cur"))'
+  echo $'      ;;'
+  echo $''
+  echo $'    *)'
+  echo $'      COMPREPLY=($(compgen -W "--help --version status init commit" -- "$cur"))'
+  echo $'      ;;'
+  echo $''
   echo $'  esac'
   echo $'} &&'
   echo $'complete -F _mygit_completions mygit'
diff --git a/spec/approvals/cli/init/custom-path-env b/spec/approvals/cli/init/custom-path-env
new file mode 100644
index 0000000..a0bec5d
--- /dev/null
+++ b/spec/approvals/cli/init/custom-path-env
@@ -0,0 +1 @@
+Saved spec/tmp/hello.yml
diff --git a/spec/approvals/cli/init/help b/spec/approvals/cli/init/help
index 06c0db8..5665f0a 100644
--- a/spec/approvals/cli/init/help
+++ b/spec/approvals/cli/init/help
@@ -11,3 +11,8 @@ Options:
 Parameters:
   CONFIG_PATH
     Path to the YAML configuration file [default: completely.yaml]
+    Can also be set by an environment variable
+
+Environment Variables:
+  COMPLETELY_CONFIG_PATH
+    Path to a completely configuration file [default: completely.yaml]
diff --git a/spec/approvals/cli/preview/help b/spec/approvals/cli/preview/help
index 0f226ea..b7f3024 100644
--- a/spec/approvals/cli/preview/help
+++ b/spec/approvals/cli/preview/help
@@ -14,8 +14,12 @@ Options:
 Parameters:
   CONFIG_PATH
     Path to the YAML configuration file [default: completely.yaml]
+    Can also be set by an environment variable
 
 Environment Variables:
+  COMPLETELY_CONFIG_PATH
+    Path to a completely configuration file [default: completely.yaml]
+
   COMPLETELY_DEBUG
     It not empty, the generated script will include an additional debugging
     snippet that outputs the compline and current word to a text file when a
diff --git a/spec/approvals/completions/function b/spec/approvals/completions/function
index 8880eff..9bad5f3 100644
--- a/spec/approvals/completions/function
+++ b/spec/approvals/completions/function
@@ -8,13 +8,23 @@ send_completions() {
   echo $'_completely_completions() {'
   echo $'  local cur compline'
   echo $'  _init_completion -s || return'
+  echo $''
   echo $'  cur=${COMP_WORDS[COMP_CWORD]}'
   echo $'  compline="${COMP_WORDS[@]:1:$COMP_CWORD-1}"'
   echo $''
   echo $'  case "$compline" in'
-  echo $'    \'generate\'*) COMPREPLY=($(compgen -A directory -W "--help --force" -- "$cur")) ;;'
-  echo $'    \'init\'*) COMPREPLY=($(compgen -W "--help" -- "$cur")) ;;'
-  echo $'    *) COMPREPLY=($(compgen -W "--help --version init generate" -- "$cur")) ;;'
+  echo $'    \'generate\'*)'
+  echo $'      COMPREPLY=($(compgen -A directory -W "--help --force" -- "$cur"))'
+  echo $'      ;;'
+  echo $''
+  echo $'    \'init\'*)'
+  echo $'      COMPREPLY=($(compgen -W "--help" -- "$cur"))'
+  echo $'      ;;'
+  echo $''
+  echo $'    *)'
+  echo $'      COMPREPLY=($(compgen -W "--help --version init generate" -- "$cur"))'
+  echo $'      ;;'
+  echo $''
   echo $'  esac'
   echo $'} &&'
   echo $'complete -F _completely_completions completely'
diff --git a/spec/approvals/completions/script b/spec/approvals/completions/script
index 841c744..ec156c2 100644
--- a/spec/approvals/completions/script
+++ b/spec/approvals/completions/script
@@ -7,13 +7,23 @@
 _completely_completions() {
   local cur compline
   _init_completion -s || return
+
   cur=${COMP_WORDS[COMP_CWORD]}
   compline="${COMP_WORDS[@]:1:$COMP_CWORD-1}"
 
   case "$compline" in
-    'generate'*) COMPREPLY=($(compgen -A directory -W "--help --force" -- "$cur")) ;;
-    'init'*) COMPREPLY=($(compgen -W "--help" -- "$cur")) ;;
-    *) COMPREPLY=($(compgen -W "--help --version init generate" -- "$cur")) ;;
+    'generate'*)
+      COMPREPLY=($(compgen -A directory -W "--help --force" -- "$cur"))
+      ;;
+
+    'init'*)
+      COMPREPLY=($(compgen -W "--help" -- "$cur"))
+      ;;
+
+    *)
+      COMPREPLY=($(compgen -W "--help --version init generate" -- "$cur"))
+      ;;
+
   esac
 } &&
 complete -F _completely_completions completely
diff --git a/spec/approvals/completions/script-only-spaces b/spec/approvals/completions/script-only-spaces
index ecdf919..a7b1dfb 100644
--- a/spec/approvals/completions/script-only-spaces
+++ b/spec/approvals/completions/script-only-spaces
@@ -7,12 +7,19 @@
 _completely_completions() {
   local cur compline
   _init_completion -s || return
+
   cur=${COMP_WORDS[COMP_CWORD]}
   compline="${COMP_WORDS[@]:1:$COMP_CWORD-1}"
 
   case "$compline" in
-    'generate'*) COMPREPLY=($(compgen -A directory -W "--help --force" -- "$cur")) ;;
-    'init'*) COMPREPLY=($(compgen -W "--help" -- "$cur")) ;;
+    'generate'*)
+      COMPREPLY=($(compgen -A directory -W "--help --force" -- "$cur"))
+      ;;
+
+    'init'*)
+      COMPREPLY=($(compgen -W "--help" -- "$cur"))
+      ;;
+
   esac
 } &&
 complete -F _completely_completions completely
diff --git a/spec/approvals/completions/script-with-debug b/spec/approvals/completions/script-with-debug
index e5741a9..045ab32 100644
--- a/spec/approvals/completions/script-with-debug
+++ b/spec/approvals/completions/script-with-debug
@@ -7,6 +7,7 @@
 _completely_completions() {
   local cur compline
   _init_completion -s || return
+
   cur=${COMP_WORDS[COMP_CWORD]}
   compline="${COMP_WORDS[@]:1:$COMP_CWORD-1}"
 
diff --git a/spec/completely/commands/generate_spec.rb b/spec/completely/commands/generate_spec.rb
index ef7ceab..dfa4bc3 100644
--- a/spec/completely/commands/generate_spec.rb
+++ b/spec/completely/commands/generate_spec.rb
@@ -25,7 +25,44 @@
     end
   end
 
-  context "with CONFIG_PATH OUTPUT_PATH" do
+  context "with COMPLETELY_CONFIG_PATH env var" do
+    before do
+      reset_tmp_dir
+      system "cp lib/completely/templates/sample.yaml spec/tmp/hello.yml"
+      system "rm -f completely.yaml"
+      ENV['COMPLETELY_CONFIG_PATH'] = 'spec/tmp/hello.yml'
+    end
+
+    after do
+      ENV['COMPLETELY_CONFIG_PATH'] = nil
+      system "rm -f hello.bash"
+    end
+
+    it "generates the bash script to hello.bash" do
+      expect { subject.run %w[generate] }.to output_approval('cli/generate/custom-path-env')
+      expect(File.read "hello.bash").to match_approval('cli/generated-script')
+    end
+  end
+
+  context "with COMPLETELY_SCRIPT_PATH env var" do
+    let(:outfile) { 'spec/tmp/tada.bash' }
+
+    before do
+      reset_tmp_dir
+      ENV['COMPLETELY_SCRIPT_PATH'] = outfile
+    end
+
+    after do
+      ENV['COMPLETELY_SCRIPT_PATH'] = nil
+    end
+
+    it "generates the bash script to the requested path" do
+      expect { subject.run %w[generate] }.to output_approval('cli/generate/custom-path-env2')
+      expect(File.read outfile).to match_approval('cli/generated-script')
+    end
+  end
+
+  context "with CONFIG_PATH SCRIPT_PATH" do
     before { reset_tmp_dir }
 
     it "generates the bash script to the specified path" do
diff --git a/spec/completely/commands/init_spec.rb b/spec/completely/commands/init_spec.rb
index b3b24d6..983082c 100644
--- a/spec/completely/commands/init_spec.rb
+++ b/spec/completely/commands/init_spec.rb
@@ -29,6 +29,21 @@
     end
   end
 
+  context "with COMPLETELY_CONFIG_PATH env var" do
+    before do
+      reset_tmp_dir
+      ENV['COMPLETELY_CONFIG_PATH'] = 'spec/tmp/hello.yml'
+    end
+
+    after { ENV['COMPLETELY_CONFIG_PATH'] = nil }
+
+    it "creates a new sample file with the requested name" do
+      expect { subject.run %w[init] }
+        .to output_approval('cli/init/custom-path-env')
+      expect(File.read 'spec/tmp/hello.yml').to eq sample
+    end
+  end
+
   context "when the config file already exists" do
     before { system "cp lib/completely/templates/sample.yaml completely.yaml" }
     after  { system "rm -f completely.yaml" }
diff --git a/spec/completely/commands/preview_spec.rb b/spec/completely/commands/preview_spec.rb
index 771cd21..60bc8f5 100644
--- a/spec/completely/commands/preview_spec.rb
+++ b/spec/completely/commands/preview_spec.rb
@@ -25,6 +25,22 @@
     end
   end
 
+  context "with COMPLETELY_CONFIG_PATH env var" do
+    before do
+      reset_tmp_dir
+      system "cp lib/completely/templates/sample.yaml spec/tmp/hello.yml"
+      system "rm -f completely.yaml"
+      ENV['COMPLETELY_CONFIG_PATH'] = 'spec/tmp/hello.yml'
+    end
+
+    after { ENV['COMPLETELY_CONFIG_PATH'] = nil }
+
+    it "outputs the generated script to STDOUT" do
+      expect { subject.run %w[preview] }
+        .to output_approval('cli/generated-script')
+    end
+  end
+
   context "with an invalid configuration" do
     it "outputs a warning to STDERR" do
       expect { subject.run %w[preview spec/fixtures/broken.yaml] }
diff --git a/spec/completely/completions_spec.rb b/spec/completely/completions_spec.rb
index 0f9673f..0044cb6 100644
--- a/spec/completely/completions_spec.rb
+++ b/spec/completely/completions_spec.rb
@@ -41,7 +41,7 @@
       end
     end
 
-    context "when COMPLETELY_DEBUG is set", :focus do
+    context "when COMPLETELY_DEBUG is set" do
       before { ENV['COMPLETELY_DEBUG'] = '1' }
       after  { ENV['COMPLETELY_DEBUG'] = nil }
 
@@ -59,7 +59,7 @@
     end
   end
 
-  describe '#tester', :focus do
+  describe '#tester' do
     it "returns a Tester object" do
       expect(subject.tester).to be_a Tester
     end