OILS / doc / index.md View on Github | oilshell.org

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1---
2in_progress: yes
3all_docs_url: -
4---
5
6All Docs
7========
8
9This page links to all docs. A dagger † means a doc isn't finished.
10
11See [Published Docs](published.html) for those that are ready to read.
12
13
14<!--
15<div id="toc">
16</div>
17-->
18
19## Good Places to Start
20
21- [A Tour of YSH](ysh-tour.html)
22- [YSH vs. Shell Idioms](idioms.html)
23- [**Oils Reference**](ref/index.html) - underlies the [help][] builtin
24- [FAQ on Docs](faq-doc.html). **Look here if you can't find
25 something**.
26
27[help]: ref/chap-builtin-cmd.html#help
28
29## Preliminaries
30
31- [INSTALL](INSTALL.html). How do I install Oils? This text file is also in
32 the `oils-for-unix` tarball.
33 - [Portability](portability.html)
34- [Getting Started](getting-started.html). How do I use the shell?
35
36## Interactive Shell
37
38- [Headless Mode](headless.html). For alternative UIs on top of YSH.
39- [Completion](completion.html) &dagger;. We emulate bash completion.
40
41## OSH is a Compatible Shell
42
43- [Shell Language Idioms](shell-idioms.html) has some advice for using any
44 shell, not just Oils.
45- [OSH Standard Library](lib-osh.html) &dagger;. Small but useful enhancements.
46
47For sophisticated users:
48
49- [Known Differences Between OSH and Other Shells](known-differences.html)
50- [OSH Quirks](quirks.html) for compatibility.
51
52## YSH is a New, Powerful Shell
53
54- [A Tour of YSH](ysh-tour.html). Explains YSH from scratch, without referring
55 to shell's legacy.
56- [What Breaks When You Upgrade to YSH](upgrade-breakage.html). When you turn
57 on YSH, there are some shell constructs you can no longer use. We try to
58 minimize the length of this list.
59- [YSH Language FAQ](ysh-faq.html)
60- [YSH Style Guide](style-guide.html)
61
62### Comparisons
63
64- [YSH vs. Shell Idioms](idioms.html). A list of code snippets.
65- [YSH vs. Shell](ysh-vs-shell.html). High-level descriptions: how does YSH
66 differ from Bourne/POSIX shell?
67- [YSH Expressions vs. Python](ysh-vs-python.html). The expression language is
68 borrowed from Python, with a few tweaks.
69- [Novelties in OSH and YSH](novelties.html). May be helpful for experienced
70 programmers.
71
72### Design Concepts
73
74- [YSH Language Influences](language-influences.html) - Shell, Python,
75 JavaScript, Lisp, ...
76- Syntax
77 - [A Feel For YSH Syntax](syntax-feelings.html)
78 - [Syntactic Concepts](syntactic-concepts.html) may help you remember the
79 language.
80 - [Command vs. Expression Mode](command-vs-expression-mode.html).
81- [Warts](warts.html). Mostly for compatibility.
82
83YSH has 3 main sublanguages:
84
85- **Command** language, which now consistently uses `{ }` for blocks.
86 - [Hay - Custom Languages for Unix Systems](hay.html). Use Ruby-like
87 blocks to declare data and interleaved code.
88- **Word** language.
89 - [Simple Word Evaluation](simple-word-eval.html). Written for shell
90 experts.
91- **Expression** language on typed data.
92 - [Egg Expressions](eggex.html). A new regex syntax, abbreviated *eggex*.
93 - [YSH Regex API](ysh-regex-api.html). Convenient and powerful.
94
95Features:
96
97- [Guide to YSH Error Handling](ysh-error.html)
98- [Guide to Procs and Funcs](proc-func.html)
99 - [Block Literals](block-literals.html) &dagger;
100- [Streams, Tables, Processes - awk, R, xargs](stream-table-process.html) &dagger;
101
102Crosscutting design issues:
103
104- [Variable Declaration, Mutation, and Scope](variables.html)
105- [Strings: Quotes, Interpolation, Escaping, and Buffers](strings.html) &dagger;
106 - [Unicode](unicode.html) &dagger;. Oils supports and prefers UTF-8.
107- [YSH I/O Builtins](io-builtins.html) &dagger;
108
109## Data Languages Avoid Ad-Hoc Parsing
110
111YSH programs "talk about" these data languages, also called interchange formats
112or protocols. In-memory data structures are *in service* of data languages on
113the wire, **not** the other way around.
114
115- [J8 Notation](j8-notation.html). An upgrade of JSON to bytes, strings,
116 lines, and structured data.
117 - [JSON](json.html). Some usage details.
118 - [Framing](framing.html) &dagger;
119- [BYO Protocols](byo.html) - for testing and completion.
120
121## The Shared Oils Runtime
122
123- [YSH Fixes Shell's Error Handling (`errexit`)](error-handling.html)
124- [Oils Error Catalog, With Hints](error-catalog.html)
125- [Tracing Execution](xtrace.html). YSH enhances shell's `set -x`.
126- [Options](options.html) &dagger;. Parsing and runtime options turn OSH into YSH.
127
128Internal details:
129
130- [Interpreter State](interpreter-state.html) &dagger;. What's inside a shell
131 interpreter?
132- [Process Model](process-model.html) &dagger;. The shell language is a thin
133 layer over the Unix kernel.
134
135## For Contributors
136
137- [README.md](oils-repo/README.html). If you want to modify Oils, start here.
138 We welcome contributions!
139- [Doc Toolchain](doc-toolchain.html) and [Doc Plugins](doc-plugins.html).
140- [Github Wiki for oilshell/oil](https://github.com/oilshell/oil/wiki)
141- [Old Docs](old/index.html). Drafts that may be deleted.
142
143Internal Architecture:
144
145- [Notes on Oils Architecture](architecture-notes.html)
146 - [Parser Architecture](parser-architecture.html)
147- [Pretty Printing](pretty-printing.html) - March 2024 design notes.
148- [mycpp/README](oils-repo/mycpp/README.html) - How we translate typed Python to
149 C++.
150
151## More
152
153- [Github Wiki for oilshell/oil](https://github.com/oilshell/oil/wiki).
154- [The blog](https://www.oilshell.org/blog/) has useful background information,
155 although older posts are more likely to have incorrect information.
156- [The home page](https://www.oilshell.org/) has links to docs for new users.
157
158Old:
159
160- [INSTALL-old](INSTALL-old.html) for the slow `oil-$VERSION` tarball, based on
161 CPython.
162
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