X-Git-Url: https://git.ladys.computer/Shushe/blobdiff_plain/2d4cbd1e2235a49728ca6ccb5a73c15fb34736d6..a2a37ad84293ab4880a23a816f7eeba60083806a:/README.markdown?ds=inline diff --git a/README.markdown b/README.markdown index 28b8b46..400679f 100644 --- a/README.markdown +++ b/README.markdown @@ -91,14 +91,17 @@ In every case, you may supply your own implementation by overriding the corresponding (allcaps) variable (e·g, set `MKDIR` to supply your own `mkdir` implementation). +- `awk` - `cat` - `cp` - `date` - `echo` - `file` - `find` +- `git` (optional; set `GIT=` to disable) - `mkdir` (requires support for `-p`) - `mv` +- `od` (requires support for `-t x1`) - `printf` - `rm` - `sed` @@ -108,6 +111,7 @@ In every case, you may supply your own implementation by overriding the - `touch` - `tr` (requires support for `-d`) - `uuencode` (requires support for `-m` and `-r`) +- `xargs` (requires support for `-0`) - `xmlcatalog` (provided by `libxml2`) - `xmllint` (provided by `libxml2`) - `xsltproc` (provided by `libxslt`) @@ -117,10 +121,14 @@ The following additional variables can be used to control the behaviour - **`SRCDIR`:** The location of the source files (default: `sources`). + Multiple source directories can be provided, so long as the same + file subpath doesn’t exist in more than one of them. - **`INCLUDEDIR`:** - The location of the source files (default: `sources/includes`). + The location of source includes (default: `sources/includes`). This can be inside of `SRCDIR`, but needn’t be. + Multiple include directories can be provided, so long as the same + file subpath doesn’t exist in more than one of them. - **`BUILDDIR`:** The location of the (temporary) build directory (default: `build`). @@ -150,13 +158,15 @@ The following additional variables can be used to control the behaviour - **`MAGICDIR`:** The location of the magic files to use (default: `$(THISDIR)/magic`). -- **`FINDOPTS`:** - Options to pass to `find` when searching for source files (default: - `-LE`). - - **`FINDRULES`:** - Rules to use with `find` when searching for source files (default: - `-flags -nohidden -and -not -name '.*'`). + Rules to use with `find` when searching for source files. + The default ignores hidden files, those that start with a period or + hyphen‐minus, and those which contain a pipe, buck, percent, or + colon. + +- **`FINDINCLUDERULES`:** + Rules to use with `find` when searching for includes (default: + `$(FINDRULES)`). - **`PARSERS`:** A white·space‐separated list of parsers to use (default: @@ -198,11 +208,12 @@ Text formats with associated X·S·L·T parsers are wrapped in a H·T·M·L Source files whose media type does not have an associated X·S·L·T parser are considered “assets” and will not be transformed. -For compatibility with this program, source filenames should not - contain Ascii whitespace or any of the following Ascii characters: - ``!"#$%&()-:<>?\^`{|}``. -These characters are either invalid in u·r·i’s or conflict with aspects - of the Make or commandline syntax. +**☡ For compatibility with this program, source filenames must not + contain Ascii whitespace, colons (`:`), pipes (`|`), bucks (`$`), + percents (`%`) or control characters, and must not begin with a + hyphen‐minus (`-`).** +The former characters have the potential to conflict with make syntax, + and a leading hyphen‐minus is confusable for a command‐line argument. ## Parsers @@ -245,8 +256,10 @@ For example, the trivial `text/plain` parser is defined as follows :⁠— + <书社:id>example:text/plain @@ -261,8 +274,21 @@ Alternatively, you can set the `@书社:supported-media-types` attribute on the root element of the parser to override media type support detection. -Parsers can also target specific dialects of X·M·L, in which case they - operate on the same basic principles as transforms (described below). +Even when `@书社:supported-media-types` is set, it is a requirement + that each parser transform any `` elements with a + `@type` which matches their registered types into something else. +Otherwise the parser will be stuck in an endless loop. +The result tree of applying the transform to the `` + element will be reparsed (in case any new `` elements + were added in its subtree), and a `@书社:parsed-by` attribute will be + added to each toplevel element in the result. +The value of this attribute will be the value of the `<书社:id>` + toplevel element in the parser. + +It is possible for parsers to support zero plaintext types. +This is useful when targeting specific dialects of X·M·L; parsers in + this sense operate on the same basic principles as transforms + (described below). The major distinction between X·M·L parsers and transforms is where in the process the transformation happens: Parsers are applied *prior* to embedding (and can be used to generate @@ -295,6 +321,15 @@ Embedding takes place after parsing but before transformation, so and update them accordingly; it will signal an error if the dependencies are recursive. +## Output Redirection + +By default, ⛩️📰 书社 installs files to the same location in `DESTDIR` + as they were placed in their `SRCDIR`. +This behaviour can be customized by setting the `@书社:destination` + attribute on the root element, whose value can give a different path. +This attribute is read after parsing, but before transformation (where + it is silently dropped). + ## Transforms Transforms are used to convert X·M·L files into their final output, @@ -340,10 +375,32 @@ The following are recommendations on effective creation of - Set `@exclude-result-prefixes` on the root `xslt:transform` element to reduce the number of declared namespaces in the final result. -The params `$buildtime`, `$srctime`, and `$path` are available within - transforms and are initialized to the current time, the time that the - source file was last modified, and the path of the output file within - $(DESTDIR). +## Global Params + +The following params are made available globally in parsers and + transforms :⁠— + +- **`BUILDTIME`:** + The current time. + +- **`SRCREV`:** + The tag or hash of the current commit in the working directory (if + `GIT` is defined and `./.git` exists). + +- **`SRCTIME`:** + The time at which the source file was last modified. + +- **`VERSION`:** + The tag or hash of the current commit in `THISDIR` (if `GIT` is + defined and `$(THISDIR)/.git` exists). + +The following params are only available in transforms :⁠— + +- **`CATALOG`:** + The path of the catalog file (within `BUILDDIR`). + +- **`PATH`:** + The path of the output file (within `DESTDIR`). ## Output Wrapping @@ -370,7 +427,7 @@ In addition to being called with the transform result, each of these modes will additionally be called with a `` element corresponding to each transform. If a transform has a `<书社:id>` top‐level element whose value is an - i·r·i, its `` element will have a corresponding + i·r·i, its `` element will have a corresponding `@书社:id` attribute. This mechanism can be used to allow transforms to insert content without matching any elements in the result; for example, the