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47 lines
1.5 KiB
Org Mode
47 lines
1.5 KiB
Org Mode
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#+title: Oil shell
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#+date: "2021-05-09 16:40:50 +08:00"
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#+date_modified: "2021-05-09 17:15:03 +08:00"
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#+language: en
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For future references:
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#+begin_src sh :results output
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oil --version
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#+end_src
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#+RESULTS:
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: Oil version 0.8.7
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: Release Date: 2021-01-23 07:35:11+00:00
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: Arch: x86_64
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: OS: Linux
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: Platform: #13~1617215757~20.10~97a8d1a-Ubuntu SMP Thu Apr 1 21:09:17 UTC 2
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: Compiler: GCC 10.2.0
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: Interpreter: OVM
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: Interpreter version: 2.7.13
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: Bytecode: bytecode-opy.zip
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This version contains incomplete implementation and documentation which is why I'm noting it here.
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- You can make an array so far with ~var x = %()~.
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- To push for an array, use ~push :ARRAY_VAR $ITEMS...~.
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- Oil has two main syntactic modes: command and expression mode.
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Command mode is more like Bash while expression mode is more like Python.
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This is how Oil can make a rich and expressive scripting that is closer to the shell.
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- Oil will go into expression mode in few places:
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+ In RHS of an assignment expression.
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+ In ~if~ statements (e.g., ~if ($EXPR) { echo "WHOA" }~).
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+ Interpolated Oil expressions with ~$[]~ (e.g., ~$[true]~, ~$[len(ARGV)~).
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- Oil can parse different modes, making it possible to create DSLs and to deal with the complex syntax of the shell.
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- You can also create an array with ~[]~.
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The ~%()~ is more like for an array of objects.
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- You can enter into expression mode with ~_~.
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Although, this simply ignores the expression and will not be printed.
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Still pretty useful.
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