Merge pull request #2865 from lzutao/ci

Reduce CI build time

Author: pietroalbini

.travis.yml

@@ -3,8 +3,17 @@ branches:
   only:
     - master
 
+cache:
+  directories:
+  - ~/.cargo
+  - target
+before_cache:
+  - cargo install cargo-cache --no-default-features --features ci-autoclean cargo-cache
+  - cargo cache
+install:
+  - export CARGO_TARGET_DIR=$TRAVIS_BUILD_DIR/target
+  - cargo install mdbook
 script:
-  - (cargo install mdbook --vers '^0.2.0' --force || true)
   - ./generate-book.sh
 
 env:

generate-book.sh

@@ -1,19 +1,22 @@
-#!/bin/sh
+#!/usr/bin/env bash
 
 set -e
 
 if [ ! -d src ]; then
     mkdir src
 fi
 
-echo "[Introduction](introduction.md)\n" > src/SUMMARY.md
+printf '[Introduction](introduction.md)\n\n' > src/SUMMARY.md
 
-for f in $(ls text/* | sort)
+find ./text ! -type d -print0 | xargs -0 -I {} ln -frs {} -t src/
+
+find ./text ! -type d -name '*.md' -print0 \
+  | sort -z \
+  | while read -r -d '' file;
 do
-    echo "- [$(basename $f ".md")]($(basename $f))" >> src/SUMMARY.md
-    cp $f src
-done
+    printf -- '- [%s](%s)\n' "$(basename "$file" ".md")" "$(basename "$file")" 
+done >> src/SUMMARY.md
 
-cp README.md src/introduction.md
+ln -frs README.md src/introduction.md
 
 mdbook build