Remove stat dependency

[Shushe] / README.markdown

diff --git a/README.markdown b/README.markdown
index bf353e0f0266f768cac8d2c48b8de8b0426e451c..952f4ee07fe25899ae0fa3aa4a3b358b85709462 100644 (file)
--- a/README.markdown
+++ b/README.markdown
@@ -57,13 +57,6 @@ Details on particular programs are given below; if a program is not
   listed, it is assumed that any Posix‐compliant implementation will
   work.
 
-### `date`
-
-This is a Posix utility, but ⛩️📰 书社 currently depends on
-  unspecified behaviour.
-When the G·N·U version of `stat` is being used, then the G·N·U version
-  of `date` is also expected.
-
 ### `file`
 
 This is a Posix utility, but ⛩️📰 书社 currently depends on
@@ -108,13 +101,6 @@ This is a Posix utility, but not included in the Linux Standard Base or
   installed by default in many distributions.
 Only `ustar` format support is required.
 
-### `stat`
-
-This is not a Posix utility, and nor is it particularly portable.
-To get around incompatibilities, ⛩️📰 书社 attempts to recognize G·N·U
-  `stat` by searching for the string `GNU` when invoked with the
-  `--version` option, and falls back to B·S·D behaviour otherwise.
-
 ### `uudecode` and `uuencode`
 
 These are Posix utilities, but not included in the Linux Standard Base
@@ -122,14 +108,6 @@ These are Posix utilities, but not included in the Linux Standard Base
 The G·N·U [Sharutils](https://www.gnu.org/software/sharutils/) package
   can be installed to access them.
 
-### `xargs`
-
-This is a Posix utility, but ⛩️📰 书社 currently depends on
-  unspecified behaviour.
-It requires support for the `-0` flag, which must disable the special
-  quote and whitespace handling of `xargs` in favour of null‐terminated
-  strings.
-
 ### `xmlcatalog` and `xmllint`
 
 These are not a Posix utilities.
@@ -206,7 +184,6 @@ In every case, you may supply your own implementation by overriding the
 - `cksum`
 - `cp`
 - `date`
-- `echo`
 - `file`
 - `find`
 - `git` (optional; set `GIT=` to disable)
@@ -221,13 +198,12 @@ In every case, you may supply your own implementation by overriding the
 - `rm`
 - `sed`
 - `sleep`
-- `stat` (BSD *or* GNU)
 - `test`
 - `touch`
 - `tr`
 - `uuencode`
 - `uudecode`
-- `xargs` (requires support for `-0`)
+- `xargs`
 - `xmlcatalog` (provided by `libxml2`)
 - `xmllint` (provided by `libxml2`)
 - `xsltproc` (provided by `libxslt`)
@@ -588,6 +564,10 @@ The following params are made available globally in parsers and
 
 - **`SRCTIME`:**
   The time at which the source file was last modified.
+  Due to limitations in Posix, this time will only have minute
+    precision if the file was modified in the last six months, and will
+    only have day precision if the file is older.
+  Users should not expect this value to be particularly stable.
 
 - **`THISREV`:**
   The value of the `THISREV` variable (if present).
@@ -693,6 +673,13 @@ They are :⁠—
     non X·M·L output types, ⁊·c).
   Other child elements will be ignored.
 
+  If the `<书社:archive>` element is given an `@书社:expanded`
+    attribute, rather than producing a tarball ⛩️📰 书社 will output
+    the directory which expanding the tarball would produce.
+  This mechanism can be used to generate multiple files from a single
+    source, provided all of the files are contained with·in the same
+    directory.
+
 - **`<书社:base64-binary>`:**
   The text nodes in the transformation result will, after removing all
     Ascii whitespace, be treated as a Base·64 string, which is then