Adding artifacts for release automation.

Signed-off-by: Kevin Swiber <[email protected]>

Cargo.toml

@@ -2,6 +2,7 @@
 name = "postman2openapi"
 version = "0.1.0"
 authors = ["Kevin Swiber <[email protected]>"]
+build = "build.rs"
 edition = "2018"
 
 [lib]

build.rs

@@ -0,0 +1,44 @@
+use std::env;
+use std::fs::{self, File};
+use std::path::Path;
+use std::process;
+
+fn main() {
+    // OUT_DIR is set by Cargo and it's where any additional build artifacts
+    // are written.
+    let outdir = match env::var_os("OUT_DIR") {
+        Some(outdir) => outdir,
+        None => {
+            eprintln!(
+                "OUT_DIR environment variable not defined. \
+                 Please file a bug: \
+                 https://github.com/kevinswiber/postman2openapi/issues/new"
+            );
+            process::exit(1);
+        }
+    };
+    fs::create_dir_all(&outdir).unwrap();
+
+    let stamp_path = Path::new(&outdir).join("postman2openapi-stamp");
+    if let Err(err) = File::create(&stamp_path) {
+        panic!("failed to write {}: {}", stamp_path.display(), err);
+    }
+    // Make the current git hash available to the build.
+    if let Some(rev) = git_revision_hash() {
+        println!("cargo:rustc-env=POSTMAN2OPENAPI_BUILD_GIT_HASH={}", rev);
+    }
+}
+
+fn git_revision_hash() -> Option<String> {
+    let result = process::Command::new("git")
+        .args(&["rev-parse", "--short=10", "HEAD"])
+        .output();
+    result.ok().and_then(|output| {
+        let v = String::from_utf8_lossy(&output.stdout).trim().to_string();
+        if v.is_empty() {
+            None
+        } else {
+            Some(v)
+        }
+    })
+}

ci/cargo-out-dir

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# Finds Cargo's `OUT_DIR` directory from the most recent build.
+#
+# This requires one parameter corresponding to the target directory
+# to search for the build output.
+
+if [ $# != 1 ]; then
+  echo "Usage: $(basename "$0") <target-dir>" >&2
+  exit 2
+fi
+
+# This works by finding the most recent stamp file, which is produced by
+# every postman2openapi build.
+target_dir="$1"
+find "$target_dir" -name postman2openapi-stamp -print0 \
+  | xargs -0 ls -t \
+  | head -n1 \
+  | xargs dirname