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add eval bash statement doc

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Levin Du
2019-11-27 15:26:26 +08:00
committed by djw
parent 5f50699c8a
commit 3e8dc18000
1 changed files with 17 additions and 0 deletions
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docs/Developer-Guide_Build-Preparation.md
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@@ -106,3 +106,20 @@ for image with latest upstream development kernel.
# Using alternate armbian builder repos and branches
By default, armbian-builder assumes working from `master` of `https://github.com/armbian/build.git`. If you are working from your own repo / branch, `touch .ignore_changes` will cause armbian-builder to not attempt a repo checkout.
# Executing any bash statement
Currently, invoking compile.sh will run a monotonous task of building all the components into a final image.
In some situation, especially when developing with Kernel or U-Boot, it is handy to run a portion of that great task like:
# using default profile
./compile.sh 'fetch_from_repo "$BOOTSOURCE" "$BOOTDIR" "$BOOTBRANCH" "yes"'
./compile.sh 'compile_uboot'
You can also dump the variable:
# using profile of `userpatches/config-my.conf`
./compile.sh my 'echo $SRC/cache/sources/$BOOTSOURCEDIR'
NOTE: please use single quotes to keep the `$VAR` from early expansion in the command line shell.