test: include full coverage for windows (#122)

Instead of launching os specific commands we now launch the os-agnostic
wee dummy `test/wd.clj` script via babashka. It is designed to satisfy
the needs of tests.

Examples of types of changes to launched processes:
- echo hello -> bb script/wd.clj :out hello
- ls -> bb script/wd.clj :ls .
- grep somestring -> bb script/wd.clj :grep somestring
- clojure -e some-expr -> bb script/wd.clj :out boo :err bah :exit 1

Replaced most uses of `cat` with `bb script/wd.clj :upper`, I felt
that transforming the input offered more proof that the process was run
successfully.

Because our wee dummy script allows us to define explicit output and
behaviour, tests assertions are now also often more explicit.

Took care to keep the args syntax the same as the original test.
(i.e. args as string vs vector of strings vs vector of symbols).

CI downloads babashka deps prior to test run. This avoids deps download
messages to stderr interfering with the test. A `bb --version` is sufficient.

Removed Windows specific tests, tests are now OS agnostic:
- windows-invoke-git-with-space-test -> process-space-in-cmd-test
- windows-executable-resolver-test -> tested throughout
- windows-pprint-test -> pprint-test
- windows-pre-start-fn-test -> pre-start-fn-test

Understood that tests can be launched from babashka or babashka/process.
When tests are run from babashka for the jvm, and bb does not exist, we
skip and pass tests that require bb with a warning. These same tests
will be run with natively with bb in a subsequent pass, so we are not
reducing babashka test coverage.

Updated process-dir-option-test:
- No longer skipping a test assertion when run under babashka.
- Deleted a redundant assertion.

Observations when requesting an empty :env noted in README:
- Windows always includes `SystemRoot`
- macOS always includes `__CF_USER_TEXT_ENCODING`

GitHub Actions changes (could be considered out of scope):
- I set fail-fast to false for the matrix, I found it helpful to all
  jobs run even after one job had failed.
- I adjusted deps caching to include ~/.deps.clj, I found this helpful
  in validating my explorations in what deps I needed to pre-download.
- Noticed bb.edn was missing from deps cache key so added it in.

Made some other very minor changes to code/comments for clarity.

Closes #116

.circleci/config.yml

@@ -29,6 +29,7 @@ jobs:
           name: Install Babashka
           command: |
             sudo bash < <(curl -s https://raw.githubusercontent.com/babashka/babashka/master/install)
+            bb --version
       - run:
           name: Run JVM tests
           command: |
@@ -58,6 +59,7 @@ jobs:
           name: Install Babashka
           command: |
             sudo bash < <(curl -s https://raw.githubusercontent.com/babashka/babashka/master/install)
+            bb --version
       - run:
           name: Run JVM tests
           command: |

.github/workflows/ci.yml

@@ -5,6 +5,7 @@ on: [push, pull_request]
 jobs:
   test:
     strategy:
+      fail-fast: false
       matrix:
         java-version: ["8", "11", "17"]
         os: [ubuntu-latest, macOS-latest, windows-latest]
@@ -24,28 +25,24 @@ jobs:
     - name: "Restore Cache"
       uses: "actions/cache@v3"
       with:
-        path: "~/.m2/repository"
-        key: "${{ runner.os }}-deps-${{ hashFiles('deps.edn') }}"
-        restore-keys: "${{ runner.os }}-deps-"
+        path: |
+          ~/.m2/repository
+          ~/.gitlibs
+          ~/.deps.clj
+        key: "${{ runner.os }}-deps-${{ hashFiles('deps.edn','bb.edn') }}"
 
     - name: Setup Clojure
       uses: DeLaGuardo/[email protected]
       with:
         cli: 1.10.3.1040
         bb: 'latest'
 
-    - name: Run tests not Windows
-      if: ${{ matrix.os != 'windows-latest' }}
-      run: |
-        clojure -M:clj-1.9:test -e windows
-        clojure -M:clj-1.10:test -e windows
-        clojure -M:clj-1.11:test -e windows
-      shell: bash
+    - name: Download bb deps
+      run:
+        bb --version
 
-    - name: Run tests on Windows
-      if: ${{ matrix.os == 'windows-latest' }}
+    - name: Run tests
       run: |
-        clojure -M:clj-1.9:test -i windows
-        clojure -M:clj-1.10:test -i windows
-        clojure -M:clj-1.11:test -i windows
-      shell: powershell
+        clojure -M:clj-1.9:test
+        clojure -M:clj-1.10:test
+        clojure -M:clj-1.11:test

README.md

@@ -390,6 +390,9 @@ The `:env` option replaces your entire environment with the provided map. To add
 For example, `"PATH"` will not update the value of `"Path"` on Windows.
 Here's an [example of a babashka task](https://github.com/babashka/fs/blob/3b8010d1a0db166771ac7f47573ea09ed45abe33/bb.edn#L10-L11) that understands this nuance.
 
+> **:env TIP**: An OS might have default environment variables it always includes.
+For example, as of this writing, Windows always includes `SystemRoot` and macOS always includes `__CF_USER_TEXT_ENCODING`.
+
 ## Pipelines
 
 The `pipeline` function returns a

script/test

@@ -1,3 +1,3 @@
 #!/usr/bin/env bash
 
-clojure -M:test -e windows @$
+clojure -M:test @$

script/wd.clj

@@ -0,0 +1,27 @@
+;; wd - wee dummy - an os-agnostic bb script launched by our unit tests
+(require '[clojure.java.io :as io]
+         '[clojure.string :as str])
+
+;; usage
+;; :out <somestring> - dump <somestring> to stdout
+;; :err <somestring> - dump <somestring> to stderr
+;; :ls <somefile> - dir of <somefile> to stdout
+;; :env - dump env to stdout
+;; :grep <somestring> - returns all lines from stdin matching <somestring>
+;; :upper - read and emit lines from stdin, but converted to uppercase
+;; :exit <someval> - exits with <someval>
+
+;; the naivest of cmd line parsing
+(doseq [[cmd val] (partition-all 2 1 *command-line-args*)]
+  (case cmd
+    ":out" (println val)
+    ":err" (binding [*out* *err*] (println val))
+    ":ls" (pr (->> val io/file (.listFiles) (map str) sort))
+    ":env" (pr (->> (System/getenv) (into {})))
+    ":grep" (doseq [l (->> *in* io/reader line-seq (filter #(str/includes? % val)))]
+              (println l))
+    ":upper" (doseq [l (->> *in* io/reader line-seq)]
+               (println (str/upper-case l)))
+    ":sleep" (Thread/sleep (parse-long val))
+    ":exit" (System/exit (parse-long val))
+    nil))