docs: More samples.

Change-Id: Ibcab3b04ae1650cd213a5a0915b7c6056a6a6964

examples/ninja/labwc-with-libinput.scm

@@ -0,0 +1,7 @@
+(environment: "pkgs.labwc"
+ depfile-path: "labwc-deps.scm"
+ rewrite:
+ ("libinput-1.29.1"
+  environment: "pkgs.libinput"
+  ; override-source: "libinput-src"
+  depfile-path: "libinput-deps.scm"))

examples/ninja/lix-eval-jobs-lix-pegtl.scm

@@ -0,0 +1,28 @@
+(environment: "pkgs.lixPackageSets.lix_2_93.nix-eval-jobs"
+ depfile-path: "lix-eval-jobs-dep.scm"
+ rewrite:
+ ("lix-2.93.3"
+  environment: "(pkgs.lixPackageSets.lix_2_93.lix.override { enableDocumentation = false; }).overrideAttrs (a: { doCheck = false; doInstallCheck = false; separateDebugInfo = false; __structuredAttrs = false; })"
+  disallow-elide: (lambda (path) (string=? path "config.h"))
+  patch:
+  (begin
+   (import
+    (zilch lang ninja)
+    (srfi 152))
+   (lambda (target)
+    (cond
+     ; Fix python codegen code
+     ((and
+       (not (null? (build-edge-implicit-dependencies target)))
+       (string-contains (car (build-edge-implicit-dependencies target)) "python"))
+      (string-append
+       "rm -rf src/lix/code-generation; "
+       "cp -rf -L --no-preserve=ownership \"$_ZILCH_ROOT\"/src/lix/code-generation src/lix/code-generation; "
+       "chmod ugo+rw -R src/lix/code-generation"))
+     (else #f))))
+  depfile-path: "lix-dep.scm"
+  rewrite:
+  ("pegtl-3.2.8"
+   environment: "pkgs.pegtl"
+   depfile-path: "pegtl-dep.scm")))
+   ;override-source: "pegtl-src")))