[2.0] Add docsrs-builder

.gitignore

@@ -1,5 +1,2 @@
 target
-*.css
-*.css.map
-.sass-cache
-.vagrant
+.cache

Cargo.toml

@@ -0,0 +1,5 @@
+[workspace]
+members = [
+    "builder",
+    "package",
+]

azure-pipelines.yml

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+# Ref: https://aka.ms/yaml
+
+jobs:
+- job: test
+  pool:
+    vmImage: 'Ubuntu 16.04'
+  steps:
+    - script: docker-compose build docsrs-development
+      displayName: 'Build development docker image'
+    - script: docker-compose up docsrs-development
+      displayName: 'Start development docker container'
+    - script: docker-compose run docsrs-development cargo build --verbose 
+      displayName: 'Build docs.rs'
+    - script: docker-compose run docsrs-development cargo test -- --test-threads=1
+      displayName: 'Test docs.rs'
+    - script: docker-compose run docsrs-development cargo fmt --all -- --check
+      displayName: 'rustfmt check'
+    - script: docker-compose run docsrs-development cargo check
+      displayName: 'cargo check'
+    - script: docker-compose run docsrs-development cargo clippy
+      displayName: 'clippy check'

builder/Cargo.toml

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+[package]
+name = "docsrs-builder"
+version = "0.0.0"
+authors = ["The Rust Project Developers"]
+edition = "2018"
+
+[dependencies]
+docsrs-package = { path = "../package" }
+cargo = { git = "https://github.com/rust-lang/cargo.git" }
+failure = "0.1"
+toml = "0.4"
+regex = "1.1"
+serde_json = "1"
+reqwest = "0.9"
+semver = "0.9"
+zip = { version = "0.5", default-features = false, features = ["deflate"] }
+walkdir = "2.2"
+clap = "2"
+log = "0.4"
+env_logger = "0.6"
+
+[dev-dependencies]
+tempfile = "3"

builder/build.rs

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+fn main() {
+    println!(
+        "cargo:rustc-env=TARGET={}",
+        std::env::var("TARGET").unwrap()
+    );
+}