This fixes at least an issue where irb will incorrectly assume
code opens a heredoc when it does not, such as this code:
```ruby
s1 = 'testing'
s2 = 'this'
s2 <<s1
p s1
s1
```
Ruby parses the `s2 <<s1` as `s2.<<(s1)`, not as a heredoc, because
`s2` is a local variable in scope. irb was using ripper without
letting ripper know that `s2` was a local variable, so ripper would
lex it as a heredoc instead of a method call.
Fix the situation by prepending a line at line 0 with all local
variable definitions in scope whenever lexing. This fixes the
heredoc issue, and potentially other issues that depend on whether
an identifier is a local variable or not.
Fixes [Bug #17530]
4ed2187f76
Follow https://github.com/ruby/irb/pull/237.
This PR fixes the following `Encoding::ConverterNotFoundError`.
```console
% bin/spring stop && bin/rails c
Spring stopped.
Running via Spring preloader in process 58395
Loading development environment (Rails 6.0.3.7)
irb(main):001:0> "こんにちは".do_something
Traceback (most recent call last):
(snip)
12: from /Users/koic/src/github.com/ruby/irb/lib/irb.rb:547:in `eval_input'
11: from /Users/koic/src/github.com/ruby/irb/lib/irb/ruby-lex.rb:232:in `each_top_level_statement'
10: from /Users/koic/src/github.com/ruby/irb/lib/irb/ruby-lex.rb:232:in `catch'
9: from /Users/koic/src/github.com/ruby/irb/lib/irb/ruby-lex.rb:233:in `block in each_top_level_statement'
8: from /Users/koic/src/github.com/ruby/irb/lib/irb/ruby-lex.rb:233:in `loop'
7: from /Users/koic/src/github.com/ruby/irb/lib/irb/ruby-lex.rb:251:in `block (2 levels) in each_top_level_statement'
6: from /Users/koic/src/github.com/ruby/irb/lib/irb.rb:548:in `block in eval_input'
5: from /Users/koic/src/github.com/ruby/irb/lib/irb.rb:758:in `signal_status'
4: from /Users/koic/src/github.com/ruby/irb/lib/irb.rb:586:in `block (2 levels) in eval_input'
3: from /Users/koic/src/github.com/ruby/irb/lib/irb.rb:650:in `handle_exception'
2: from /Users/koic/src/github.com/ruby/irb/lib/irb.rb:601:in `encode_with_invalid_byte_sequence'
1: from /Users/koic/src/github.com/ruby/irb/lib/irb.rb:601:in `new'
/Users/koic/src/github.com/ruby/irb/lib/irb.rb:601:in `initialize': code
converter not found (UTF-8 to UTF-8) (Encoding::ConverterNotFoundError)
```
First, this patch skips `Encoding::Converter.new` for the same encoding.
170531df19/lib/irb.rb (L601)
Next, this is a talk about the condition for skipping. `IRB.conf[:LC_MESSAGES].encoding`
becomes `"UTF-8"` string when `Reline.encoding_system_needs.name` is set in the below.
170531df19/lib/irb/input-method.rb (L269)
OTOH, `message.encoding` is `Encoding::UTF_8`, so these are compared as a string by this patch.
6df6e76cfc
* using the appropriciate exception instead of `break` so that the session
can be continue after the `irb_source` and `irb_load` commands
* suppress extra new line due to one more `#prompt` call
bdefaa7cfd
You can use "measure" command to check performance in IRB like below:
irb(main):001:0> 3
=> 3
irb(main):002:0> measure
TIME is added.
=> nil
irb(main):003:0> 3
processing time: 0.000058s
=> 3
irb(main):004:0> measure :off
=> nil
irb(main):005:0> 3
=> 3
You can set "measure :on" by "IRB.conf[:MEASURE] = true" in .irbrc, and, also,
set custom performance check method:
IRB.conf[:MEASURE_PROC][:CUSTOM] = proc { |context, code, line_no, &block|
time = Time.now
result = block.()
now = Time.now
puts 'custom processing time: %fs' % (Time.now - time) if IRB.conf[:MEASURE]
result
}
3899eaf2e2
Omit the results evaluated at assignment if they are too long.
The behavior of ECHO_ON_ASSIGNMENT being on by default is hard to understand,
so I change it to off by default. Instead, we turn OMIT_ON_ASSIGNMENT on by
default. The result is displayed on assignment, but it will always be short
and within one line of the screen.
c5ea79d5ce
e9e17cbc05 (enabling the warning by
default) caused a warning in test-spec:
```
/data/chkbuild/tmp/build/20190802T213005Z/ruby/spec/ruby/core/binding/irb_spec.rb
Binding#irb
- creates an IRB session with the binding in scope/data/chkbuild/tmp/build/20190802T213005Z/ruby/spec/ruby/core/binding/fixtures/irb.rb:3: warning: __FILE__ in eval may not return location in binding; use Binding#source_location instead
```
20190802T213005Z.log.html.gz
ref: [Bug #4352]
