diff options
| -rw-r--r-- | doc/manual/builtins.xml | 9 | ||||
| -rw-r--r-- | src/libexpr/primops.cc | 12 | ||||
| -rw-r--r-- | tests/lang/eval-okay-readfile.exp | 1 | ||||
| -rw-r--r-- | tests/lang/eval-okay-readfile.nix | 1 |
4 files changed, 23 insertions, 0 deletions
diff --git a/doc/manual/builtins.xml b/doc/manual/builtins.xml index b6c886199b5c..4c8e3163b1a8 100644 --- a/doc/manual/builtins.xml +++ b/doc/manual/builtins.xml @@ -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> diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc index 2a96e25a8484..bb9190579af2 100644 --- a/src/libexpr/primops.cc +++ b/src/libexpr/primops.cc @@ -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); diff --git a/tests/lang/eval-okay-readfile.exp b/tests/lang/eval-okay-readfile.exp new file mode 100644 index 000000000000..979771c7a320 --- /dev/null +++ b/tests/lang/eval-okay-readfile.exp @@ -0,0 +1 @@ +Str("builtins.readFile ./eval-okay-readfile.nix\n",[]) diff --git a/tests/lang/eval-okay-readfile.nix b/tests/lang/eval-okay-readfile.nix new file mode 100644 index 000000000000..82f7cb17435a --- /dev/null +++ b/tests/lang/eval-okay-readfile.nix @@ -0,0 +1 @@ +builtins.readFile ./eval-okay-readfile.nix |