EXAMPLES: add README file

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Qinghao Shi 2019-10-17 23:06:11 +01:00
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# Examples testing script
The scripts in this folder are used for testing mbed-os official examples. it contains following files:
- `examples.py` the main script which serves as command line interface
- `examples.json` the default configuration file for the script, which contains the information to the examples. if required, a customised configuration file can be pass as argument to the script
- `examples_lib.py` the library file, which contains the main function of the testing scripts
## The Scripts
`examples.py` provide command line interface and sub commands that makes easier to test examples. included sub commands are:
* **import** - Imports each of the repos and its dependencies (.lib files) associated with the specific examples name from the json configuration file. Note if there is already a clone of the repo then it will first be removed to ensure a clean, up to date cloning.
* **clone** - clones each of the repos associated with the specific examples name from the json configuration file. Note if there is already a clone of the repo then it will first be removed to ensure a clean, up to date cloning.
* **deploy** - If the example directory exists as provided by the json configuration file, pull in the examples dependencies by using `mbed-cli deploy`.
* **update** - For each example repo identified in the config json object, update the version of mbed-os to that specified by the supplied GitHub tag. This function assumes that each example repo has already been cloned.
* **compile** - Compiles combinations of example programs, targets and compile chains.
* **export** - Exports and builds combinations of example programs, targets and IDEs.
* **list** - display examples in configuration file in a table
* **symlink** - create symbolic link to given mbed-os PATH
for more detailed options, please use `-h` or `--help`
## The Configuration file
here is the section of default configuration file:
```json
{
"examples": [
{
"name": "mbed-os-example-blinky",
"github": "https://github.com/ARMmbed/mbed-os-example-blinky",
"sub-repo-example": false,
"subs": [],
"features" : [],
"targets" : [],
"toolchains" : [],
"exporters": [],
"compile" : true,
"export": true,
"test" : true,
"baud_rate": 9600,
"compare_log": ["mbed-os-example-blinky/tests/blinky.log"],
"auto-update" : true
},
...
{
"name": "mbed-os-example-tls",
"github": "https://github.com/ARMmbed/mbed-os-example-tls",
"sub-repo-example": true,
"subs": [
"benchmark",
"tls-client",
"hashing",
"authcrypt"
],
"features" : [],
"targets" : ["K66F", "NUCLEO_F429ZI"],
"toolchains" : ["GCC_ARM", "ARM"],
"exporters": [],
"compile" : false,
"export": false,
"test" : false,
"baud_rate": 9600,
"compare_log": [
"mbed-os-example-tls/tests/benchmark.log",
"mbed-os-example-tls/tests/tls-client.log",
"mbed-os-example-tls/tests/hashing.log",
"mbed-os-example-tls/tests/authcrypt.log"
],
"auto-update" : true
}
]
}
```
### Fields
* **name** - name of the example, should be the base name of the example repository address, will throw if not match
* **github** - example github repository address
* **sub-repo-example** specify if the example repository have sub folder for each examples
* **subs** - array of sub examples names
* **features** The features that must be in the features array of a target in targets.json
* **baud_rate** example default baud rate
* **compare_log** array of log which is compared to command line output when testing, if example has many sub examples, the order of log should match with the order of sub examples.
* **targets** - list of mbed-os dev boards that runs this example.
* **targets** list of targeted development boards
* **toolchains** toolchain to use for compile
* **exporters** allowed exporters
* **compile** enable compiling
* **export** enable exporting
* **test** enable testing
### Values
`[ ]` means all possible alternatives
## Typical usage
In mbed-OS CI, we usually following the bellow steps to compile and test mbed-os-examples.
1. Clone mbed-os repository to current folder
```
git clone https://github.com/ARMmbed/mbed-os.git
```
2. Clone the examples repo to current folder , users can pass a `-e` option to the script to filter out rest of the exmpale and let the scripts only run on particular one
```
python mbed-os/tools/test/examples/examples.py clone
```
3. Create symbolic link to mbed-os for every examples. this is step is to let the all the examples share a single mbed-os folder, rather that checkout the mbed-os folder many times . In bellow command pass an absolute path as the argument is highly recommended
```
python mbed-os/tools/test/examples/examples.py symlink $PWD/mbedos
```
4. deploy mbed-os other dependency libraries
```
python mbed-os/tools/test/examples/examples.py deploy
```
5. compile test for the examples on a specific target
```
python mbed-os/tools/test/examples/examples.py compile -m <target>
```
once the compile test finished, the scripts will prints the result table as follows:
```
Passed Example Compilation:
+---------------------------------+--------+-----------+----------+--------------+
| EXAMPLE NAME | TARGET | TOOLCHAIN | TEST GEN | BUILD RESULT |
+---------------------------------+--------+-----------+----------+--------------+
| mbed-os-example-kvstore | K64F | GCC_ARM | TEST_ON | PASSED |
| mbed-os-example-tls-socket | K64F | GCC_ARM | TEST_ON | PASSED |
| mbed-os-example-blockdevice | K64F | GCC_ARM | TEST_ON | PASSED |
| mbed-os-example-wifi | K64F | GCC_ARM | TEST_OFF | PASSED |
| mbed-os-example-error-handling | K64F | GCC_ARM | TEST_ON | PASSED |
| mbed-os-example-sd-driver | K64F | GCC_ARM | TEST_ON | PASSED |
| mbed-os-example-crash-reporting | K64F | GCC_ARM | TEST_ON | PASSED |
| mbed-os-example-filesystem | K64F | GCC_ARM | TEST_ON | PASSED |
| mbed-os-example-blinky | K64F | GCC_ARM | TEST_ON | PASSED |
| mbed-os-example-bootloader | K64F | GCC_ARM | TEST_OFF | PASSED |
| mbed-os-example-cpu-stats | K64F | GCC_ARM | TEST_ON | PASSED |
| mbed-os-example-sys-info | K64F | GCC_ARM | TEST_ON | PASSED |
| mbed-os-example-attestation | K64F | GCC_ARM | TEST_ON | PASSED |
+---------------------------------+--------+-----------+----------+--------------+
Number of failures = 0
```
after the compilation stage, a `test_spec.json` file will be generated, later this file will be consumed by GreenTea tests, which is going to test the compiled example on hardware platform.