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So the example you showed with XML uses XPath, what do you think that does? I am sure something similar can be created in python for editing lisp code as easily

So the example you showed with XML uses XPath, what do you think that does? I am sure something similar can be created in python for editing lisp code as easily as this.

_wmd 9y ago
> My first thought is how I'd parse, modify and write it back without losing user's comments, formatting, changes and suchlike. Is this some well understood format with libraries for common programming languages? If not, it is just likely to proliferate more crappy config management with chunks of regexes and suchlike > Elsewhere people are saying it's just Scheme. I'm sure I could find a parser for that in Python, and maybe if I'm really lucky that parser will record whitespace and comment nodes, and have a reverse transformation, but do I really want to be writing error prone 20-line AST visitors just to tweak an integer setting? (No, I most certainly do not, and I consider design decisions like this a massive code smell that'd ward me off any further investigation of a system) XML satisfies all the above: no AST visitors, no custom parsing routines, no attempting to solve the halting problem in order to introspect a simple scalar value. What you're saying is that the same is "possible" with Scheme. At least one followup comment (finally) described an algorithm that would actually allow machine-driven file changes, but we're still left with rather than a working out of the box solution, a description of an algorithm that "might someday work" and that's not the sort of thing I want to be dealing with while building business solutions on somebody else's dime, which drives my conclusion above: this config file syntax is not for me, and my original comment explained precisely why.
- openasocket 9y ago
  You're complaining that there isn't good tooling around the config file format for a project that is described as "in its early development stages" and provides "alpha releases". If you're talking about using this "while building business solutions on somebody else's dime" your getting way ahead of yourself. I'm sure they will expose a library for parsing and editing the config format before a general release.
  - _wmd 9y ago
    I know reading is difficult, but I suggest you review the original question I initially replied to waaay back when. Besides that, this isn't a new config format, if a good solution for modifying it existed, it most certainly would have been written sometime by someone else in the now 47 year history of Scheme. Despite all the hate and presumed expertise on this tragic little subthread, nobody has been able to link to such a thing, or indeed offer any practical solution beyond "you should rewrite everything in Scheme" or "link against the compiler's parser", or "implement this algorithm I just came up with 10 minutes ago"
    - openasocket 9y ago
      You're right, I can't find a python library with the exact functionality you want. But a solution does exist, you would just have to write it yourself. It takes about 200 lines of python, less if you use a parser generator. But if you don't want to do that (nothing wrong with that! Why do work when you don't have to, after all), well then you'll have to either ask someone else to do it for you or just not use this project, assuming this functionality is critical for you. Or you could use sed or a templating system, up to you.
      - _wmd 9y ago
        I have little doubt it could be written, but at risk of going blue in the face, this was irrelevant to the original question ("what do you dislike about this syntax?"). Never mind, 'truth' has won out in the end regardless, and I note for future that the presence of Lisp on a CV is fair reason to pause and reconsider.
        openasocket 9y ago
        "My first thought is how I'd parse, modify and write it back without losing user's comments, formatting, changes and suchlike. Is this some well understood format with libraries for common programming languages?" Sorry for trying to answer your question then...

So the example you showed with XML uses XPath, what do you think that does? I am sure something similar can be created in python for editing lisp code as easily as this.

_wmd 9y ago

> My first thought is how I'd parse, modify and write it back without losing user's comments, formatting, changes and suchlike. Is this some well understood format with libraries for common programming languages? If not, it is just likely to proliferate more crappy config management with chunks of regexes and suchlike > Elsewhere people are saying it's just Scheme. I'm sure I could find a parser for that in Python, and maybe if I'm really lucky that parser will record whitespace and comment nodes, and have a reverse transformation, but do I really want to be writing error prone 20-line AST visitors just to tweak an integer setting? (No, I most certainly do not, and I consider design decisions like this a massive code smell that'd ward me off any further investigation of a system) XML satisfies all the above: no AST visitors, no custom parsing routines, no attempting to solve the halting problem in order to introspect a simple scalar value. What you're saying is that the same is "possible" with Scheme. At least one followup comment (finally) described an algorithm that would actually allow machine-driven file changes, but we're still left with rather than a working out of the box solution, a description of an algorithm that "might someday work" and that's not the sort of thing I want to be dealing with while building business solutions on somebody else's dime, which drives my conclusion above: this config file syntax is not for me, and my original comment explained precisely why.

openasocket 9y ago
You're complaining that there isn't good tooling around the config file format for a project that is described as "in its early development stages" and provides "alpha releases". If you're talking about using this "while building business solutions on somebody else's dime" your getting way ahead of yourself. I'm sure they will expose a library for parsing and editing the config format before a general release.
- _wmd 9y ago
  I know reading is difficult, but I suggest you review the original question I initially replied to waaay back when. Besides that, this isn't a new config format, if a good solution for modifying it existed, it most certainly would have been written sometime by someone else in the now 47 year history of Scheme. Despite all the hate and presumed expertise on this tragic little subthread, nobody has been able to link to such a thing, or indeed offer any practical solution beyond "you should rewrite everything in Scheme" or "link against the compiler's parser", or "implement this algorithm I just came up with 10 minutes ago"
  - openasocket 9y ago
    You're right, I can't find a python library with the exact functionality you want. But a solution does exist, you would just have to write it yourself. It takes about 200 lines of python, less if you use a parser generator. But if you don't want to do that (nothing wrong with that! Why do work when you don't have to, after all), well then you'll have to either ask someone else to do it for you or just not use this project, assuming this functionality is critical for you. Or you could use sed or a templating system, up to you.
    - _wmd 9y ago
      I have little doubt it could be written, but at risk of going blue in the face, this was irrelevant to the original question ("what do you dislike about this syntax?"). Never mind, 'truth' has won out in the end regardless, and I note for future that the presence of Lisp on a CV is fair reason to pause and reconsider.
      - openasocket 9y ago
        "My first thought is how I'd parse, modify and write it back without losing user's comments, formatting, changes and suchlike. Is this some well understood format with libraries for common programming languages?" Sorry for trying to answer your question then...