initial commit

LICENSE.txt

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+The MIT License (MIT)
+
+Copyright (c) 2015 Michael Contento
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+[circleci-matrix][]
+===================
+
+Small utility to mirror [TravisCI][]'s [build matrix][] on [CircleCI][].
+
+## Installation
+
+**TBD**
+
+## Usage
+
+First you need to define your build matrix in a new file called
+`.circleci-matrix.yml` like this:
+
+    env:
+        - VERSION=5.0
+        - VERSION=4.2
+        - VERSION=4.1
+        - VERSION=4.0
+
+    command:
+        - echo 'hi!'
+        - echo "Version is $VERSION"
+
+Now you're ready to execute it with:
+
+    $ circleci-matrix
+    INFO: circleci-matrix version: 0.1.0
+    INFO: circleci node total: 1
+    INFO: circleci node index: 0
+
+    INFO: Running env: VERSION=5.0
+    INFO: Running command: echo 'hi!'
+    hi!
+    INFO: Running command: echo "Version is $VERSION"
+    Version is 5.0
+
+    INFO: Running env: VERSION=4.2
+    INFO: Running command: echo 'hi!'
+    hi!
+    INFO: Running command: echo "Version is $VERSION"
+    Version is 4.2
+
+    INFO: Running env: VERSION=4.1
+    INFO: Running command: echo 'hi!'
+    hi!
+    INFO: Running command: echo "Version is $VERSION"
+    Version is 4.1
+
+    INFO: Running env: VERSION=4.0
+    INFO: Running command: echo 'hi!'
+    hi!
+    INFO: Running command: echo "Version is $VERSION"
+    Version is 4.0
+
+    INFO: Done
+
+All commands has been executed with the right value in `$VERSION`.
+
+## Parallelism
+
+[CircleCI][]'s [parallelism][] is supported out of the box! Have a look at the following
+example where I set the `CIRCLE_NODE_TOTAL` manually:
+
+    $ CIRCLE_NODE_TOTAL=4 circleci-matrix.sh
+    INFO: circleci-matrix version: 0.1.0
+    INFO: circleci node total: 4
+    INFO: circleci node index: 0
+
+    INFO: Running env: VERSION=5.0
+    INFO: Running command: echo 'hi!'
+    hi!
+    INFO: Running command: echo "Version is $VERSION"
+    Version is 5.0
+
+    INFO: Skipping env: VERSION=4.2
+
+    INFO: Skipping env: VERSION=4.1
+
+    INFO: Skipping env: VERSION=4.0
+
+    INFO: Done
+
+  [circleci-matrix]: https://github.com/michaelcontento/circleci-matrix
+  [CircleCI]: https://circleci.com/
+  [TravisCI]: https://travis-ci.org/
+  [build matrix]: http://docs.travis-ci.com/user/customizing-the-build/#Build-Matrix
+  [parallelism]: https://circleci.com/docs/setting-up-parallelism

example/.circleci-matrix.yml

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+env:
+    - VERSION=5.0
+    - VERSION=4.2
+    - VERSION=4.1
+    - VERSION=4.0
+
+command:
+    - echo 'hi!'
+    - echo "Version is $VERSION"

src/circleci-matrix.sh

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+#!/usr/bin/env bash
+set -e
+
+VERSION="0.1.0"
+CONFIG_FILE=".circleci-matrix.yml"
+
+# Ensure sane defaults
+CIRCLE_NODE_TOTAL=${CIRCLE_NODE_TOTAL:-1}
+CIRCLE_NODE_INDEX=${CIRCLE_NODE_INDEX:-0}
+
+error() {
+    local message=$1
+    echo >&2 "ERROR: $message"
+    exit 1
+}
+
+info() {
+    local message=$1
+    if [ "$message" == "" ]; then
+        echo ""
+    else
+        echo "INFO: $message"
+    fi
+}
+
+ensure_file() {
+    if [ ! -f $CONFIG_FILE ]; then
+        error "No $CONFIG_FILE file found!"
+    fi
+}
+
+read_file() {
+    # 1) Remove leading spaces
+    # 2) Remove leading dashes
+    # 3) Remove comment lines
+    # 4) Remove empty lines
+    sed \
+        -e 's/^ *//' \
+        -e 's/^- //' \
+        -e '/^#.*/d' \
+        -e '/^$/d' \
+        $CONFIG_FILE
+}
+
+process_commands() {
+    local line=""
+    local mode=""
+
+    read_file | while read line; do
+        # Detect mode
+        if [ "env:" == "$line" ]; then
+            mode="env"
+            continue
+        elif [ "command:" == "$line" ]; then
+            mode="command"
+            continue
+        fi
+
+        # Process commands
+        if [ "command" == "$mode" ]; then
+            info "Running command: $line"
+            eval $line
+            continue
+        fi
+    done
+}
+
+process_envs() {
+    local line=""
+    local mode=""
+    local i=0
+
+    read_file | while read line; do
+        # Detect mode
+        if [ "env:" == "$line" ]; then
+            mode="env"
+            continue
+        elif [ "command:" == "$line" ]; then
+            mode="command"
+            continue
+        fi
+
+        # Process envs
+        if [ "env" == "$mode" ]; then
+            if [ $(($i % $CIRCLE_NODE_TOTAL)) -eq $CIRCLE_NODE_INDEX ]; then
+                info "Running env: $line"
+                export $line
+                process_commands
+            else
+                info "Skipping env: $line"
+            fi
+            ((i=i+1))
+            info ""
+            continue
+        fi
+    done
+}
+
+main() {
+    info "circleci-matrix version: $VERSION"
+    info "circleci node total: $CIRCLE_NODE_TOTAL"
+    info "circleci node index: $CIRCLE_NODE_INDEX"
+    info ""
+
+    ensure_file
+    process_envs
+
+    info "Done"
+}
+
+main