ci: build man page on ARM cross-compile

This fixes a bug where ripgrep's man page wasn't generated in the ARM
cross-compile build. Mostly, this should just require installing
asciidoc and making sure we test that it actually works.

Fixes #791

.travis.yml

@@ -41,6 +41,12 @@ matrix:
           - binutils-arm-linux-gnueabihf
           - libc6-armhf-cross
           - libc6-dev-armhf-cross
+          # For generating man page.
+          - libxslt1-dev
+          - asciidoc
+          - docbook-xsl
+          - xsltproc
+          - libxml2-utils
     # Beta channel. We enable these to make sure there are no regressions in
     # Rust beta releases.
     - os: linux
@@ -67,6 +73,12 @@ matrix:
           - binutils-arm-linux-gnueabihf
           - libc6-armhf-cross
           - libc6-dev-armhf-cross
+          # For generating man page.
+          - libxslt1-dev
+          - asciidoc
+          - docbook-xsl
+          - xsltproc
+          - libxml2-utils
 install: ci/install.sh
 script: ci/script.sh
 before_deploy: ci/before_deploy.sh

ci/script.sh

@@ -23,6 +23,13 @@ main() {
     # sanity check the file type
     file target/"$TARGET"/debug/rg
 
+    # Check that we've generated man page and other shell completions.
+    outdir="$(cargo_out_dir "target/$TARGET/debug")"
+    file "$outdir/rg.bash"
+    file "$outdir/rg.fish"
+    file "$outdir/_rg.ps1"
+    file "$outdir/rg.1"
+
     # Apparently tests don't work on arm, so just bail now. I guess we provide
     # ARM releases on a best effort basis?
     if is_arm; then
@@ -32,15 +39,6 @@ main() {
     # Test that zsh completions are in sync with ripgrep's actual args.
     "$(dirname "${0}")/test_complete.sh"
 
-    # Check that we've generated man page and other shell completions.
-    outdir="$(cargo_out_dir "target/$TARGET/debug")"
-    file "$outdir/rg.bash"
-    file "$outdir/rg.fish"
-    file "$outdir/_rg.ps1"
-    # N.B. man page isn't generated on ARM cross-compile, but we gave up
-    # long before this anyway.
-    file "$outdir/rg.1"
-
     # Run tests for ripgrep and all sub-crates.
     cargo test --target "$TARGET" --verbose --all
 }