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* New primop `readFile' to get the contents of a file as a string.

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This commit is contained in:
Eelco Dolstra 2007-11-21 13:49:59 +00:00
parent c370755583
commit 06f95dd07c
4 changed files with 23 additions and 0 deletions
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9
doc/manual/builtins.xml
View file

@ -441,6 +441,15 @@ in config.someSetting</programlisting>
-->
<varlistentry><term><function>builtins.readFile</function>
<replaceable>path</replaceable></term>
<listitem><para>Return the contents of the file
<replaceable>path</replaceable> as a string.</para></listitem>
</varlistentry>
<varlistentry><term><function>removeAttrs</function>
<replaceable>attrs</replaceable> <replaceable>list</replaceable></term>

12
src/libexpr/primops.cc
View file

@ -622,6 +622,17 @@ static Expr prim_dirOf(EvalState & state, const ATermVector & args)
}
/* Return the contents of a file as a string. */
static Expr prim_readFile(EvalState & state, const ATermVector & args)
{
PathSet context;
Path path = coerceToPath(state, args[0], context);
if (!context.empty())
throw EvalError(format("string `%1%' cannot refer to other paths") % path);
return makeStr(readFile(path));
}
/*************************************************************
* Creating files
*************************************************************/
@ -968,6 +979,7 @@ void EvalState::addPrimOps()
addPrimOp("__pathExists", 1, prim_pathExists);
addPrimOp("baseNameOf", 1, prim_baseNameOf);
addPrimOp("dirOf", 1, prim_dirOf);
addPrimOp("__readFile", 1, prim_readFile);
// Creating files
addPrimOp("__toXML", 1, prim_toXML);

1
tests/lang/eval-okay-readfile.exp Normal file
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@ -0,0 +1 @@
Str("builtins.readFile ./eval-okay-readfile.nix\n",[])

1
tests/lang/eval-okay-readfile.nix Normal file
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@ -0,0 +1 @@
builtins.readFile ./eval-okay-readfile.nix