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Allow includes from nix.conf

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This commit is contained in:
Shea Levy 2018-02-13 08:16:32 -05:00
parent f471aacff2
commit 6eb1040e90
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GPG key ID: 5C0BD6957D86FE27
3 changed files with 36 additions and 2 deletions
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7
doc/manual/command-ref/conf-file.xml
View file

@ -40,7 +40,12 @@
<para>The configuration files consist of
<literal><replaceable>name</replaceable> =
<replaceable>value</replaceable></literal> pairs, one per line.
<replaceable>value</replaceable></literal> pairs, one per line. Other
files can be included with a line like <literal>include
<replaceable>path</replaceable></literal>, where
<replaceable>path</replaceable> is interpreted relative to the current
conf file and a missing file is an error unless
<literal>!include</literal> is used instead.
Comments start with a <literal>#</literal> character. Here is an
example configuration file:</para>

26
src/libutil/config.cc
View file

@ -80,7 +80,31 @@ void Config::applyConfigFile(const Path & path, bool fatal)
vector<string> tokens = tokenizeString<vector<string> >(line);
if (tokens.empty()) continue;
if (tokens.size() < 2 || tokens[1] != "=")
if (tokens.size() < 2)
throw UsageError("illegal configuration line '%1%' in '%2%'", line, path);
auto include = false;
auto ignoreMissing = false;
if (tokens[0] == "include")
include = true;
else if (tokens[0] == "!include") {
include = true;
ignoreMissing = true;
}
if (include) {
if (tokens.size() != 2)
throw UsageError("illegal configuration line '%1%' in '%2%'", line, path);
auto p = absPath(tokens[1], dirOf(path));
if (pathExists(p)) {
applyConfigFile(p, fatal);
} else if (!ignoreMissing) {
throw Error("file '%1%' included from '%2%' not found", p, path);
}
continue;
}
if (tokens[1] != "=")
throw UsageError("illegal configuration line '%1%' in '%2%'", line, path);
string name = tokens[0];

5
tests/init.sh
View file

@ -16,7 +16,12 @@ mkdir "$NIX_CONF_DIR"
cat > "$NIX_CONF_DIR"/nix.conf <<EOF
build-users-group =
keep-derivations = false
include nix.conf.extra
EOF
cat > "$NIX_CONF_DIR"/nix.conf.extra <<EOF
fsync-metadata = false
!include nix.conf.extra.not-there
EOF
# Initialise the database.