Add rpm spec %config support

README.md

@@ -245,6 +245,24 @@ If you have scripts that need to be executable when they're installed on your ta
 }
 ```
 
+### Config files
+
+If you have files that need to be preserved after every `yum update`, you can add them to the `config` array.
+On update you can achieve following two behaviors:
+1. `"noreplace": false` (default): Local edited file will be renamed with `.rpmsave`
+2. `"noreplace": true`: Local edited file will be preserved and new file from update will be renamed with `.rpmnew`
+
+```json
+{
+  "spec": {
+    "config": [
+      {"file": "./my-config.js", "noreplace": true},
+      {"file": "./my-other-config.js"}
+    ]
+  }
+}
+```
+
 ### Post Install Actions
 
 If you need to perform any actions after installing your package (such as moving files on the target server) you can specify these inline using the `post` property:

lib/spec.js

@@ -43,6 +43,17 @@ function getExecutableFiles(pkg) {
   };
 }
 
+function getConfigFiles(pkg) {
+  const name = pkg.name;
+
+  return _.get(pkg, 'spec.config', []).map((o) => {
+    return {
+      file: path.join('/usr/lib/', name, o.file),
+      noreplace: o.noreplace || false
+    };
+  });
+}
+
 function getPostInstallCommands(pkg) {
   return _.get(pkg, 'spec.post', []);
 }
@@ -60,7 +71,8 @@ module.exports = function (pkg, release) {
     nodeVersion: getNodeVersion(pkg),
     version: pkg.version,
     license: pkg.license,
-    prune: shouldPrune(pkg)
+    prune: shouldPrune(pkg),
+    configFiles: getConfigFiles(pkg)
   },
   getExecutableFiles(pkg),
   getServiceProperties(pkg)

templates/spec.mustache

@@ -61,3 +61,6 @@ rm -rf %{buildroot}
 %attr(755, {{username}}, {{username}}) {{.}}
 {{/executableFiles}}
 {{/hasExecutableFiles}}
+{{#configFiles}}
+%config{{#noreplace}}(noreplace){{/noreplace}} {{file}}
+{{/configFiles}}

test/fixtures/my-cool-api-with-config-files.json

@@ -0,0 +1,17 @@
+{
+  "name": "my-cool-api",
+  "version": "1.1.1",
+  "scripts": {
+    "start": "node index.js"
+  },
+  "description": "My Cool API",
+  "main": "index.js",
+  "author": "[email protected]",
+  "license": "MIT",
+  "spec": {
+    "config": [
+      {"file": "./no-replace.js", "noreplace": true},
+      {"file": "./config.js"}
+    ]
+  }
+}

test/fixtures/my-cool-api-with-config-files.spec

@@ -0,0 +1,49 @@
+%define name my-cool-api
+%define version 1.1.1
+%define release 1
+%define buildroot %(mktemp -ud %{_tmppath}/%{name}-%{version}-%{release}-XXXXXX)
+
+Name: %{name}
+Version: %{version}
+Release: %{release}
+Summary: my-cool-api
+
+Group: Installation Script
+License: MIT
+Source: %{name}.tar.gz
+BuildRoot: %{buildroot}
+Requires: nodejs
+BuildRequires: nodejs
+AutoReqProv: no
+
+%description
+My Cool API
+
+%prep
+%setup -q -c -n %{name}
+
+%build
+npm prune --production
+npm rebuild
+
+%pre
+getent group my-cool-api >/dev/null || groupadd -r my-cool-api
+getent passwd my-cool-api >/dev/null || useradd -r -g my-cool-api -G my-cool-api -d / -s /sbin/nologin -c "my-cool-api" my-cool-api
+
+%install
+mkdir -p %{buildroot}/usr/lib/my-cool-api
+cp -r ./ %{buildroot}/usr/lib/my-cool-api
+mkdir -p %{buildroot}/var/log/my-cool-api
+
+%post
+systemctl enable /usr/lib/my-cool-api/my-cool-api.service
+
+%clean
+rm -rf %{buildroot}
+
+%files
+%defattr(644, my-cool-api, my-cool-api, 755)
+/usr/lib/my-cool-api
+/var/log/my-cool-api
+%config(noreplace) /usr/lib/my-cool-api/no-replace.js
+%config /usr/lib/my-cool-api/config.js

test/spec.js

@@ -70,6 +70,14 @@ describe('spec', () => {
     assert.equal(spec, expected);
   });
 
+  it('adds all of the config files from the spec.config property in package.json', () => {
+    const pkg = require('./fixtures/my-cool-api-with-config-files');
+    const expected = loadFixture('my-cool-api-with-config-files.spec');
+    const spec = createSpecFile(pkg);
+
+    assert.equal(spec, expected);
+  });
+
   it('includes post-install actions from the spec.post property in package.json', () => {
     const pkg = require('./fixtures/my-cool-api-with-post');
     const expected = loadFixture('my-cool-api-with-post.spec');