diff options
| -rw-r--r-- | doc/manual/expressions/advanced-attributes.xml | 16 | ||||
| -rw-r--r-- | src/libstore/build.cc | 2 | ||||
| -rw-r--r-- | tests/pass-as-file.sh | 2 |
3 files changed, 13 insertions, 7 deletions
diff --git a/doc/manual/expressions/advanced-attributes.xml b/doc/manual/expressions/advanced-attributes.xml index fee35f0be..83ad6eefc 100644 --- a/doc/manual/expressions/advanced-attributes.xml +++ b/doc/manual/expressions/advanced-attributes.xml @@ -254,11 +254,17 @@ big = "a very long string"; </programlisting> then when the builder runs, the environment variable - <envar>big</envar> will contain the absolute path to a temporary - file containing <literal>a very long string</literal>. This is - useful when you need to pass large strings to a builder, since - most operating systems impose a limit on the size of the - environment (typically, a few hundred kilobyte).</para></listitem> + <envar>bigPath</envar> will contain the absolute path to a + temporary file containing <literal>a very long + string</literal>. That is, for any attribute + <replaceable>x</replaceable> listed in + <varname>passAsFile</varname>, Nix will pass an environment + variable <envar><replaceable>x</replaceable>Path</envar> holding + the path of the file containing the value of attribute + <replaceable>x</replaceable>. This is useful when you need to pass + large strings to a builder, since most operating systems impose a + limit on the size of the environment (typically, a few hundred + kilobyte).</para></listitem> </varlistentry> diff --git a/src/libstore/build.cc b/src/libstore/build.cc index 0b1985828..e64bd3fef 100644 --- a/src/libstore/build.cc +++ b/src/libstore/build.cc @@ -1662,7 +1662,7 @@ void DerivationGoal::startBuilder() } else { Path p = tmpDir + "/.attr-" + int2String(fileNr++); writeFile(p, i.second); - env[i.first] = p; + env[i.first + "Path"] = p; } } diff --git a/tests/pass-as-file.sh b/tests/pass-as-file.sh index b61576e05..3dfe10baa 100644 --- a/tests/pass-as-file.sh +++ b/tests/pass-as-file.sh @@ -10,7 +10,7 @@ mkDerivation { passAsFile = [ \"foo\" ]; foo = [ \"xyzzy\" ]; builder = builtins.toFile \"builder.sh\" '' - [ \"\$(cat \$foo)\" = xyzzy ] + [ \"\$(cat \$fooPath)\" = xyzzy ] touch \$out ''; } |