val / crun Goto Github PK

Description

I want to process some text stream with my program (the same program) as in :

echo "hello\nworld\n" | ./myprog.cr  process-lines | ./myprog.cr  process-columns

When using the crystal compiler like in #! usr/bin/env crystal I got an error so following a issue
I found crun. From the description I think it should handle my case but when using it
I found the following error :

Unhandled exception: Error deleting file '/home/ nieto/.cache/crun/writter.crystal.lock': No such file or directory (Errno)
Failed to raise an exception: END_OF_STACK
[0x55c92d246da6] ???
[0x55c92d201afb] __crystal_raise +43
[0x55c92d202af5] ???
[0x55c92d20b131] ???
[0x55c92d2067ac] ???
[0x55c92d205bff] ???
[0x55c92d21f46d] ???
[0x55c92d21d9a5] ???
[0x55c92d20429a] main +74
[0x7f8f791e309b] __libc_start_main +235
[0x55c92d20087a] _start +42
[0x0] ???

minimal program

#!/usr/bin/env crun

while line = gets 
  puts line
end 

or

#!/usr/bin/env crun 
sleep 1

Example – Simple usage:

crun eval 'puts ARGV' -- 1 2 3

Example – Run crun with Kakoune:

$ crun eval %{
  # ---
  # kakoune:
  #   github: alexherbo2/kakoune.cr
  # ---
  require "kakoune"

  ...
} -- %val{session} %val{client}

Example – Run crun with Kakoune:

evaluate-commands %sh{
  crun <<-'EOF'
    # ---
    # kakoune:
    #   github: alexherbo2/kakoune.cr
    # ---
    require "kakoune"

    ...
EOF
}

Thanks for this project.

In current master build_path is set to

@@build_path ||= "#{build_dir}/#{SOURCE_FILENAME}"

This means that build_path is likely to end with a .cr extension. In case binfmt support for .cr file has been enabled, crun will be called again when the cached compiled file is run

Process.exec(build_path, ARGS)

Adding an extra extension to ensure that cached compiled file does not end with a .cr extension should fix the problem

@@build_path ||= "#{build_dir}/#{SOURCE_FILENAME}.crystal"

I think it should be safe to not call shards install if there's already a lockfile. This saves a lot of time, especially if the network is slow.

diff --git a/src/build.cr b/src/build.cr
index 146acd3..448650b 100644
--- a/src/build.cr
+++ b/src/build.cr
@@ -20,7 +20,8 @@ module Crun
     hash = Dir.cd(build_dir) do
       if shards_yaml
         build_shards_config
-        hash = build_subprocess("shards", %w[install])
+        hash =
+          build_subprocess("shards", %w[install]) unless File.exists? "#{build_dir}/shards.lock"
       end
 
       hash || build_subprocess("crystal", ["build", "-o", build_path, SOURCE])

CI build fails because you use require "tempfile" which has been removed

Is there a way to install crun via a package manager or shards?

I don't like git cloning and running make manually; Is sth like cargo install --git https://github.com/sigmaSd/arabic-reshaper-rs available?

PS: Does crun work with Crystal v1?