Initial commit

1 files changed, 70 insertions, 0 deletions

diff --git a/fetch.nim b/fetch.nim
new file mode 100644
index 0000000..8e1e262
--- /dev/null
+++ b/fetch.nim
@@ -0,0 +1,70 @@
+import httpclient
+import os
+import osproc
+import strformat
+
+const
+    Version = "3.5.1"
+    BaseUrl = "https://github.com/google/protobuf/releases/download"
+    Systems = [
+        "linux-aarch_64",
+        "linux-x86_32",
+        "linux-x86_64",
+        "osx-x86_64",
+        "win32",
+    ]
+
+proc zipName(identifier: string): string =
+    &"protoc-{Version}-{identifier}.zip"
+
+proc exeSuffix(identifier: string): string =
+    result = ""
+    if identifier == "win32":
+        result = ".exe"
+
+proc compilerName(identifier: string): string =
+    &"protoc-{identifier}{exeSuffix(identifier)}"
+
+proc downloadFile(url, target: string) =
+    let
+        client = newHttpClient()
+    echo(&"downloading {url} -> {target}")
+    if not fileExists(target):
+        downloadFile(client, url, target)
+
+proc downloadRelease(identifier: string) =
+    let
+        url = &"{BaseUrl}/v{Version}/{zipName(identifier)}"
+        target = zipName(identifier)
+    downloadFile(url, target)
+
+proc downloadSources() =
+    let url = &"https://github.com/google/protobuf/archive/v{Version}.zip"
+    downloadFile(url, &"v{Version}.zip")
+
+proc extractCompiler(identifier: string) =
+    echo(&"extracting compiler: {identifier}")
+    createDir("src/nimpb_buildpkg/protobuf")
+    let args = @["-j", "-o", zipName(identifier), &"bin/protoc{exeSuffix(identifier)}"]
+    discard execProcess("unzip", args, nil, {poStdErrToStdout, poUsePath})
+    moveFile(&"protoc{exeSuffix(identifier)}", &"src/nimpb_buildpkg/protobuf/{compilerName(identifier)}")
+
+proc extractIncludes() =
+    echo("extracting includes")
+    createDir("src/nimpb_buildpkg/protobuf")
+    let args = @["-o", zipName("linux-x86_64"), "include/*", "-d", "src/nimpb_buildpkg/protobuf"]
+    discard execProcess("unzip", args, nil, {poStdErrToStdout, poUsePath})
+
+proc extractLicense() =
+    echo("extracting LICENSE")
+    let args = @["-o", "-j", &"v{Version}.zip", &"protobuf-{Version}/LICENSE", "-d", "src/nimpb_buildpkg/protobuf"]
+    discard execProcess("unzip", args, nil, {poStdErrToStdout, poUsePath})
+
+for system in Systems:
+    downloadRelease(system)
+    extractCompiler(system)
+
+downloadSources()
+
+extractIncludes()
+extractLicense()