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authorMark Allen <[email protected]>2017-02-02 18:08:09 -0600
committerMark Allen <[email protected]>2017-02-02 18:08:09 -0600
commit3647703c4fd9079475c5ac5661c5b98f43ac2a27 (patch)
tree98d841a7b86b21eb993053dd97824807d66ac1a1 /kerl
parent0484b5cfaf72e44be5d058e623f28b70d3cac311 (diff)
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Assert perl exists before builds (#170)gh170
Perl 5 is required to compile Erlang from source. It's used (among other things) to assemble BEAM opcodes, NIF jump tables and more. We now assert perl exists on the PATH before we proceed to build Erlang or test for Perl's version string. We also now test for Java before we try to find its version. Java is not required to compile Erlang though, so we don't output any warnings or errors if its not found.
Diffstat (limited to 'kerl')
-rwxr-xr-xkerl28
1 files changed, 25 insertions, 3 deletions
diff --git a/kerl b/kerl
index a494256..11d6fe2 100755
--- a/kerl
+++ b/kerl
@@ -382,13 +382,35 @@ get_otp_version()
get_perl_version()
{
- perl -v | grep version | sed $SED_OPT -e 's/.*v5\.([0-9]+)\.[0-9].*/\1/'
+ if assert_perl; then
+ perl -v | grep version | sed $SED_OPT -e 's/.*v5\.([0-9]+)\.[0-9].*/\1/'
+ else
+ echo "FATAL: I couldn't find perl which is required to compile Erlang."
+ exit 1
+ fi
+}
+
+assert_perl()
+{
+ perl_loc=$(which perl)
+ if [ -z "$perl_loc" ]; then
+ return 1
+ else
+ # 0 to bash is "true" because of Unix exit code conventions
+ return 0
+ fi
}
get_javac_version()
{
- javaout=$(javac -version 2>&1)
- echo "$javaout" | cut -d' ' -f2 | cut -d'.' -f2
+ java_loc=$(which javac)
+ if [ -z "$java_loc" ]; then
+ # Java's not installed, so just return 0
+ 0
+ else
+ javaout=$(javac -version 2>&1)
+ echo "$javaout" | cut -d' ' -f2 | cut -d'.' -f2
+ fi
}
show_configuration_warnings()